T800, TB7100, TB8100 base stations - Tait Support site · T800, TB7100, TB8100 base stations TA703 Change Over Module Service Manual M703-01-0004 · Issue 4 · June 2014. 2 TA703-xx-xxxx

T800, TB7100, TB8100 base stationsTA703 Change Over Module Service Manual

M703-01-0004 · Issue 4 · June 2014

2 TA703-xx-xxxx Change Over Module Service Manual © Tait Limited June 2014

Contact InformationTait Communications Corporate Head OfficeTait Limited P.O. Box 1645 Christchurch New ZealandFor the address and telephone number of regional offices, refer to our website: www.taitradio.com

Copyright and TrademarksAll information contained in this document is the property of Tait Limited. All rights reserved. This document may not, in whole or in part, be copied, photocopied, reproduced, translated, stored, or reduced to any electronic medium or machine-readable form, without prior written permission from Tait Limited.The word TAIT and the TAIT logo are trademarks of Tait Limited.All trade names referenced are the service mark, trademark or registered trademark of the respective manufacturers.

DisclaimerThere are no warranties extended or granted by this document. Tait Limited accepts no responsibility for damage arising from use of the information contained in the document or of the equipment and software it describes. It is the responsibility of the user to ensure that use of such information, equipment and software complies with the laws, rules and regulations of the applicable jurisdictions.

Enquiries and CommentsIf you have any enquiries regarding this document, or any comments, suggestions and notifications of errors, please contact your regional Tait office.

Updates of Manual and EquipmentIn the interests of improving the performance, reliability or servicing of the equipment, Tait Limited reserves the right to update the equipment or this document or both without prior notice.

Intellectual Property RightsThis product may also be made under license under one or more of the following U.S. Patents: 5,146,497, 5,148,482, 5,164,986, 5,185,795, 5,185,796, 5,271,017, 5,377,229 and 5,502,767. The AMBE+2™ voice coding Technology embodied in this product is protected by intellectual property rights including patent rights, copyrights and trade secrets of Digital Voice Systems, Inc. This voice coding Technology is licensed solely for use within this Communications Equipment. The user of this Technology is explicitly prohibited from attempting to decompile, reverse engineer, or disassemble the Object Code, or in any other way convert the Object Code into a human-readable form. Protected by U.S. Patents 5,870,405, 5,826,222, 5,754,974, 5,701,390, 5,715,365, 5,649,050, 5,630,011, 5,581,656, 5,517,511, 5,491,772, 5,247,579, 5,226,084 and 5,195,166.

Environmental ResponsibilitiesTait Limited is an environmentally responsible company which supports waste minimization, material recovery and restrictions in the use of hazardous materials.

The European Union’s Waste Electrical and Electronic Equipment (WEEE) Directive requires that this product be disposed of separately from the general waste stream when its service life is over. For more information about how to dispose of your unwanted Tait product, visit the Tait WEEE website at www.taitradio.com/weee. Please be environmentally responsible and dispose through the original supplier, or contact Tait Limited.Tait Limited also complies with the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment (RoHS) Directive in the European Union.In China, we comply with the Measures for Administration of the Pollution Control of Electronic Information Products. We will comply with environmental requirements in other markets as they are introduced.

http://www.taitradio.com

http://www.taitradio.com/weee/

TA703-xx-xxxx Change Over Module Service Manual Preface 3© Tait Limited June 2014

Preface

Scope of ManualThis document contains information about the operation and functions of the TA703-xx-xxxx Change Over Module. This is a T800-based product but can be used with TB7100 and TB8100 equipment. Differences are described within the manual.

Document Conventions“File > Open” means “click File on the menu bar, then click Open on the list of commands that pops up”. “Monitor > Module Details > Reciter” means “click the Monitor icon on the toolbar, then in the navigation pane find the Module Details group, and select Reciter from it”.

Within this manual, four types of alerts are given to the reader. The following paragraphs illustrate each type of alert and its associated symbol.

Warning This alert is used when there is a hazardous situation which, if not avoided, could result in death or serious injury.

Caution This alert is used when there is a hazardous situation which, if not avoided, could result in minor or moderate injury.

Notice This alert is used to highlight information that is required to ensure procedures are performed correctly. Incorrectly performed pro-cedures could result in equipment damage or malfunction.

This icon is used to draw your attention to information that may improve your understanding of the equipment or procedure.

Associated DocumentationThis manual should be read in conjunction with the following documents. Updates are made available on the Tait support web. Print copies of the documentation are available on request.■ TB8100 base station Service Manual (MBA-00016-xx)■ TB7100 base station Service Manual (MBB-00005-xx)■ T800 series II Service Manual (M800-00-xxx)

Technical notes are published from time to time to describe applications for Tait products, to provide technical details not included in manuals, and to offer solutions for any problems that arise. Look for new or updated

4 Preface TA703-xx-xxxx Change Over Module Service Manual © Tait Limited June 2014

technical notes on Tait’s technical support web site. Updates may also be published on the Tait support web site.

Publication Record

Abbreviations

Issue Publication Date Description

00 January 2001 First release

01 July 2003 Update

02 June 2005 Update

03 September 2005 Update

04 June 2014 Generalise to T800, TB7100 and TB8100 base stations.

Abbreviation Description

RR Remote Reset. In earlier versions this signal was named Remote Alarm Clear

RS Remote Select. This signal was known as Remote Tx or Tx Select

RAC Remote Alarm Clear: superseded by RR

RTS Remote Transmit Select: superseded by RS

FWD PWR Forward Power meters signal from external monitor module or from the base station transmitter. Typical T858 delivers 5V for output power of 50Watt

REV PWR Reverse Power meter signal from external monitor module or from the base station transmitter

RSSI Receiver Signal Strength Indicator, an analog signal from receiver that indicates how strong the incoming RF signal is at the receiver antenna port. In a UHF receiver this is about 10dB per Volt, relative to 2V at -110dBm.

TA703-xx-xxxx Change Over Module Service Manual 5© Tait Limited June 2014

Contents

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91.2 Minimum system requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1.2.1 Receiver with RSSI fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101.2.2 Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101.2.3 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1.3 System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111.4 Variants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.4.1 Change Over Module Variants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121.4.2 System Variants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.5 Specifications 14

1.6 Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151.7 Hardware Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

1.7.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171.7.2 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181.7.3 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181.7.4 Mechanical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2 Setup and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212.1 Internal Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2.1.1 Mode Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212.1.2 Repeater Mode Versus Base Station Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 212.1.3 Forward and Reverse Power Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . 212.1.4 Single External Power Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222.1.5 Alarm Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222.1.6 Internal Link Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222.1.7 Dip Switch and Test Point Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

2.2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262.2.1 Power Monitor Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

2.3 Rack Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272.4 Connection to Typical Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

2.4.1 Installation Kits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282.4.2 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

2.5 Power Monitor Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322.5.1 Power Monitor Kits - all variants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322.5.2 Cable Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332.5.3 Installation - Two Power Monitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35


3 Calibration and Testing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 373.1 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

3.1.1 RSSI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 373.1.2 Verifying RSSI operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 373.1.3 Mute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 383.1.4 Mute Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 383.1.5 Reverse Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 393.1.6 Forward Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 393.1.7 Power Supply and Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 393.1.8 Repeater Audio: Receiver to Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3.2 External Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 403.2.1 Front Panel Adjustments - Base A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 403.2.2 Front Panel Adjustments - Base B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

3.3 Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 454.1 Front Panel Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

4.1.1 Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 454.1.2 LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 464.1.3 Preset Resistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

4.2 Standard Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 464.2.1 Power Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 464.2.2 Transmitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 464.2.3 Receiving. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 474.2.4 Change Over . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 474.2.5 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 474.2.6 Base Selection - Mode A, C and D Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

4.3 Change Over . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 474.3.1 Manual Change Over - Mode A,C and D . . . . . . . . . . . . . . . . . . . . . . . . . . . . 474.3.2 Mode A Test Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 484.3.3 Manual Change Over - Mode B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 484.3.4 Automatic Change Over - Mode A, C and D . . . . . . . . . . . . . . . . . . . . . . . . . 484.3.5 Automatic Change Over - Mode B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

4.4 Fault Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 494.4.1 PSU Monitor (PSU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 504.4.2 Forward Power Monitor (FWD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 504.4.3 Reverse Power Monitor (REV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 504.4.4 Error Detection () . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 504.4.5 Rx-Gate Monitor (MUTE) - Modes A and C only . . . . . . . . . . . . . . . . . . . . . 514.4.6 Rx-Gate Monitor (MUTE) - Modes D only . . . . . . . . . . . . . . . . . . . . . . . . . . 514.4.7 Combined Rx-Gate - Mode B only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 524.4.8 Combined and Mute Alarm - Mode B only . . . . . . . . . . . . . . . . . . . . . . . . . . 52

4.5 Base Station Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

TA703-xx-xxxx Change Over Module Service Manual 7© Tait Limited June 2014

4.5.1 Selection Following Error Condition - Mode A, C and D . . . . . . . . . . . . . . . 524.5.2 Selection Following Error Condition - Mode B . . . . . . . . . . . . . . . . . . . . . . . 52

5 Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 535.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 535.2 Monitor Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

5.2.1 PSU and Battery Input Comparators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 545.2.2 Forward Power Input Comparators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 545.2.3 Reverse Power Input Comparators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 555.2.4 Input Comparators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 565.2.5 RX-Gate Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 575.2.6 TX-Key Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 575.2.7 Direct Logic Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 575.2.8 Direct Logic Outputs (Alarm). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 585.2.9 Alarm Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 585.2.10 Battery Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 595.2.11 Signal Polarity

605.3 Change Over . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

5.3.1 Change-Over Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 605.3.2 Change Over Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

5.4 External Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 625.4.1 PL1 and PL2 15-way D-ranges (Base A and Base B

625.4.2 PL3 15-way D-range (4 Wire E&M) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 625.4.3 PL4 15-way D-range (Alarm Outputs)

635.4.4 SK1 25-way D-range (Modem Interface) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 635.4.5 XLR Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

6 PCB information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 656.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

6.1.1 Parts Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 656.1.2 Grid Reference Indexes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 656.1.3 Using CAD Circuit Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

6.2 SMD Parts List (227-70301-07) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 676.3 Non-SMD Parts List (227-70301-07) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 756.4 PCB Layout (227-70301-07) - top side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 776.5 PCB Layout (227-70301-07) - bottom side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 786.6 Circuit Diagram (227-70301-07) - page 1 of 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 796.7 Circuit Diagram (227-70301-07) - page 2 of 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 806.8 Circuit Diagram (227-70301-07) - page 3 of 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 816.9 Circuit Diagram (227-70301-07) - page 4 of 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82


7 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 837.1 Internal Wiring Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 837.2 External Cable Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

7.2.1 Installation Kit/Power Monitor Cable IPN 219-02701-00 . . . . . . . . . . . . . . . 857.2.2 Installation Kit Cable (TA703-11-0010) IPN 219-02702-01 . . . . . . . . . . . . . 867.2.3 Installation Kit Cable (TA703-11-0011) IPN 219-02703-01 . . . . . . . . . . . . . 897.2.4 Installation Kit Cable (TA703-11-0012) IPN 219-02700-01 . . . . . . . . . . . . . 917.2.5 Installation Kit Cable (TA703-11-7010) IPN 219-03115-00 . . . . . . . . . . . . . 937.2.6 Installation Kit Cable (TA703-11-8010) IPN 219-03460-00 . . . . . . . . . . . . . 947.2.7 Power Monitor Kit Cable IPN 219-00025-82 . . . . . . . . . . . . . . . . . . . . . . . . . 95

TA703-xx-xxxx Change Over Module Service Manual Introduction 9 June 2014 © Tait Limited

1 Introduction

This part introduces the TA703-xx-xxxx Change Over Module and contains the following sections:■ Overview■ Minimum system requirements■ System Configuration■ Variants■ Specifications■ Operating Modes■ Hardware Description

1.1 OverviewThe TA703-xx-xxxx Change Over Module system provides automated failure protection for a Tait conventional base station which has a standby transmitter, receiver and power supply. If a fault is detected in the operating base station, the unit can automatically switch operation to the standby base station and indicate the fault on the front panel.

The module either identifies a fault condition in the active repeater, or compares a measure on the active repeater and a measure on the standby repeater. It gives flexibility in alarm monitoring and switching and can be operated locally or remotely.

The TA703-xx-xxxx Change Over Module replaces the TA703-01 and has many added features, including:■ Simultaneous monitoring active and standby base stations■ Intelligent switchover on failure.■ Enhanced alarm connection options■ Removal of internal RF plumbing■ Optional +5v regulator for use by other modules.■ A DB25 connector for flexible connection configurations.■ RSSI switching■ Future modem option allows technicians in the field to easily detect the error condition after

change over.■ Mode B provides continuous alarm monitoring and switching, and independent TX and RX

switching

The TA703-xx-xxxx Change Over Module system has a wide range of options and functions. For more information on power monitoring options and the installation kits, see Variants on page 12.

Notice Throughout this manual, the upper base station is called Base A, the lower base sta-tion is Base B. Base A is the normally active base station and Base B is the standby, unless stated otherwise.

10 Introduction TA703-xx-xxxx Change Over Module Service Manual June 2014 © Tait Limited

1.2 Minimum system requirements

1.2.1 Receiver with RSSI fitted

The receivers inputs need to be derived from a single antenna to ensure that they receive the same signal strength. Systems with a split receiver antenna setup will give invalid readings in the RSSI comparator module.

The RSSI of each receiver is connected to the Change Over Module for comparison. The RSSI characteristics are different for different receivers. The RSSI of a TB7100 mobile-based base station maxes out at 3.3V, while the RSSI of the TB8100 can be as high as 8V. Careful tuning is required for the setup of the 6dB difference allowed between two receivers before the RSSI alarm is triggered.

1.2.2 Transmitter

To establish proper operation of the transmitter, at least one power monitor signal must be provided to the TA703. This signal may be derived from an external power monitor module or from the PA itself. Refer to the system variants in section 1.4.2, System Variants.

The power monitor signal level is based on the typical level a 50 W PA produces. Under certain circumstances like when an external monitor is used or when operating with low power settings, you may have to adjust the gain of the input amplifiers for the forward and reverse voltage levels. Refer to IC201 in the circuit diagrams and PCB layout in section 6, PCB information.

The Transmitter antenna and receiver antenna may or may not be in different locations, based on design decisions.

1.2.3 Limitations

Due to the variations in proximity of the terminals, the incoming RF signals to the base station tends to vary dramatically. This feature of voice systems was instrumental in the implementation of the mute alarm algorithms.

For Modes A and C, the receive gate opening difference between Base A and Base B must be greater than one second, on three consecutive occasions before the Mute alarm is raised. Consequently, short data messages of less than one second duration will not activate the mute alarm. Similarly a system with continuous carrier can not generate a mute alarm.

For Mode D, the receive gate opening difference between Base A and Base B must be greater than three seconds, on five consecutive occasions before the Mute alarm is raised. Consequently, short data messages of less than three seconds duration will not activate the mute alarm. Similarly a system with continuous carrier can not generate a mute alarm.

Refer to section 4.4.5, Rx-Gate Monitor (MUTE) - Modes A and C only. If these limitations affect your system, please contact TCI for a customised solution.


1.3 System ConfigurationA TA703-xx-xxxx Change Over Module system can be configured in a number of ways, according to customer requirements.

The system can be setup with either a single, dual or no power monitors. Where no power monitor is fitted, power is monitored by the transmitter power monitor signals. The system may have a duplexer, RX/TX Coaxial Relay or dual antennae.

The three block diagrams that follow show some typical configuration options:

Figure 1.1 Typical Two Power Monitor System Configuration

Figure 1.2 Typical One Power Monitor System Configuration

SystemDuplexer or Rx/Tx Coaxial Relay

or dual antennae

Antenna

PowerMonitor

PowerMonitor

ReceiverCombiner

Base SelectRelayTA703-xx-0000

RX TX

RX TX

Active Base

Standby Base

System Interface

System Interface


or dual antennae

Antenna

PowerMonitor

ReceiverCombiner


RX TX

RX TX

Active Base

Standby Base

System Interface

System Interface


Figure 1.3 Internal Power Monitoring Configuration

1.4 Variants

1.4.1 Change Over Module VariantsThe TA703-xx-xxxx Change Over Module is available in six frequency variants, with further op-tions provided for each frequency.

The difference between the variants is the receiver combiner and transmitter power monitor modules, which are specific for a particular frequency range. Models TA703-xx-0001 to -0004 require a single power monitor to monitor power from both base stations.

The Change Over Module is also able to monitor each base station separately. In this case, the module requires a receiver splitter and an additional power monitor module which require installation with the Change Over Module.

Models -0001 to -0004 include a coaxial relay for transmitter output chantage over.

TA703-5x-xxxx indicates that the front panel is black.

Module variant Frequency

T800 TB8100 TB7100

TA703-xx-0000 TA703-51-8000 TA703-51-7000 Standard change over module

TA703-xx-0001 Not available TA703-51-7001 072-088MHz

TA703-xx-0002 TA703-51-8002 TA703-51-7002 132-174MHz

TA703-xx-0003 Not available TA703-51-7003 320-390 MHz

TA703-xx-0004 TA703-51-8004 TA703-51-7004 400-512 MHz


or dual antennae

Antenna

ReceiverCombiner


RX TX

RX TX

Active Base

Standby Base

System Interface

System Interface


1.4.2 System Variants

The Change-Over Module is part of a TA703-xx-xxxx system. Each system contains:■ TA703-xx-xxxx Change-Over Unit with a coaxial Relay and a Receiver Splitter in the ordered

frequency band■ installation kit (see section2.2, Installation for details to interface with the specified backplane

or System Interface)■ power monitor kit/s (see section2.2, Installation for details) according to the required power

monitoring options.

The diagram below shows how the system variant numbering system operates:

TA703-y1-0xxxFrequency Band01234

= no splitter or relay= 72-88MHZ= 132-174MHz= 320-390MHz= 400-512MHz

Power Monitors012

= none= one= two

Front Panel

0

5

= beige

= black

System Interface012378

= not specified= T800-50-0000= T800-50-0001= T800-52-0000= TB7100= TB8100

For example, TA703-51-0824 system monitors T8100 base stations which:■ require two separate power monitors■ operate in the 400-512MHz band.


1.5 Specifications

Supply Voltage 10.8 - 16V DC

Current Consumption 100mA

Change Over by transparent latching relays

2 wire Rx Audio

2 wire Tx Audio

Rx-Gate + RSSI

Tx-Key

Coaxial Relay for Transmitter Output

Switch time 3ms after fault detection

Notice Receiver signals are derived from a single antenna and split to the respective receiv-ers by a low insertion loss power splitter.

Change Over Criteria Supply

Forward Power

Reverse Power

RSSI

Rx-Gate

External Alarms All Alarm - Base A

Supply - Base A

Forward Power - Base A

Reverse Power - Base A

RSSI - Base A

Rx-Gate - Base A

All Alarm - Base B

Supply - Base B

Forward Power - Base B

Reverse Power - Base B

RSSI - Base B

Rx-Gate - Base B

Low Battery Alarm combined with All Alarm A and B

Alarm Polling Mode A 20mSec

Mode B 10mSec

Mode C 20mSec

Mode D 20mSec

Additional Features Output for Rx/Tx Relay for operation in simplex mode

Optional DC-DC converter to power third-party equipment


1.6 Operating ModesThe TA703-01-0000 Change Over Module currently operates in four standard modes.■ Mode A is the standard operating mode, enhanced but backward-compatible with the TA703-

01■ Mode B is an additional mode with specific customised features■ Mode C is identical to Mode A except that in Mode C Remote Select automatically resets all

alarms■ Mode D is a mode specifically designed for marine and rural environments because the Rx gate

mute alarm algorithm is modified. Otherwise all other features are like mode C.

This table highlights the differences and similarities between Mode A, B, C and D.

Feature Mode A Mode B Mode C Mode D

Power reset sequence

✔ ✔ ✔ ✔

Remote Select ✔ ✔ ✔ ✔

Remote Reset ✔ ✔ ✔ ✔

Front panel base station selection

✔ ✖ ✔ ✔

Front panel reset ✔ ✔ ✔ ✔

PSU monitor ✔ ✔ ✔ ✔

FWD monitor ✔ ✔ ✔ ✔

REV monitor ✔ ✔ ✔ ✔

RSSI monitor ✔ ✔ ✔ ✔

Mute monitor ✔ ✔ ✔ ✔

Independent TX and Rx switching

✖ ✔ ✖ ✖

Operation following error condition

One shot Continuous One shot One shot

Combined Rx gate ✖ ✔ ✖ ✖

Combined RSSI and mute alarm

✖ ✔ ✖ ✖

Alarm polling interval

20mSec 10mSec 20mSec 20mSec

Consecutive error samples before alarm activates (except Rx Gate mute alarm)

✘ ✔ ✘ ✘

Tx-Key change over

✔ ✖ ✔ ✔

Tx change over Automatic or Manual (local or remote)

Manual (remote only)

Automatic or Manual (local or remote)



Rx change over Automatic or Manual (local or remote)

Automatic Automatic or Manual (local or remote)


Default Base Selected Base A (Rx) Selected (Tx)

Selected Selected

Remote Select automatically resets all alarms

✖ Tx only switches without reset

✔ ✔

No of Rx gate opening before change over

3x in 1 sec 3x in 1 sec 5x in 3 sec

Gates combined ✔

Remote forced change-over

Remote change over (Tx select) level change +Pulse low on rem Alm Clear

Remote change over (Tx select) level change only

As A

Combined RSSI and Rx Gate alarm

✔

Feature Mode A Mode B Mode C Mode D


1.7 Hardware Description

1.7.1 General

The TA703-xx-xxxx Change Over Module consists of a 1U 19” rack mount unit with switches and LED indicators on the front panel, and connectors on the rear. Inside the unit a single Control PCB, flush-mounted against the front panel, interfaces to the base stations and customer’s equipment via D-range connectors on the back panel. Power monitor cables connect via RCA sockets on the back panel. A 4-way terminal block connects to two coaxial relays, one for base selection and one for RX/TX change over.

DCInput 13.8V

Coaxial Relay Driver Outputs

FWD

(B)FW

D(A)

ModemInterface

Alarms Out

4 Wire E&M

Radio Interface (B)

Radio Interface (A)

Front Panel

Rear PanelEarthing Tag (optional)

TA703 PCB

Power

Coaxial RelayTerminals

RCASockets

Customer EquipmentConnectors

Battery Indicator

Base B Indicators

Base A Indicators

Reset

Base select

T800 Connectors


1.7.2 Front Panel

The Change Over Module front panel has a series of LED indicators, switches, and preset resistors.

T800 Change Over Module

Reset Base

A B

Active Stdby TX RX FWD REV PSU RSSI MUTE Active Stdby TX RX FWD REV PSU RSSI MUTE BATT LOW

Base A Base B

■ 1 x momentary push button switch to clear and reset after an error condition■ 1 x double throw, double pole toggle switch for local, manual base station selection■ 2 x yellow LEDs indicating active or standby status for Base A■ 2 x green LEDs indicating TX and RX activity for Base A■ 5 x red LEDs indicating error conditions on Base A■ 3 x preset resistors for adjusting fault condition trigger levels for Base A faults■ 2 x yellow LEDs indicating active or standby status for Base B■ 2 x green LEDs indicating TX and RX activity for Base B■ 5 x red LEDs indicating error conditions on Base B■ 3 x preset resistors for adjusting fault condition trigger levels for Base B faults■ 1 x red LED indicating battery power status■ 1 x preset resistor for adjusting battery fault trigger level

Notice A more detailed description of these components is included in section 4, Operation.

1.7.3 Rear Panel

The Change Over Module rear panel has a series connectors as shown below.

Modem InterfaceRelay Driver Outputs Alarms Out 4 Wire E&M Radio Interface (B) Radio Interface (A)

REV (B)

FWD (B) FWD (A)

REV (A)+13.8V

RX/TX+13.8V

SelectBase

■ Connection to the Change Over Module is as follows:■ 4 pin XLR plug Power Input (+13.8v, 1.2A max)■ Tag-strip for Co-axial relay control output.■ 4 x RCA sockets for Forward and Reverse power on Base A and Base B■ A separate 25 pin D-range plug provides customer-specific interface (modem, not normally

fitted).■ 1 x 15 pin D-range plug to provide the switched receiver and transmitter signals to the

customers remote control site ■ 1 x 15 pin D-range plug to provide the alarm signals to the remote control site ■ 2 x 15 pin D-range connectors plug for connection to Base A and Base B. ■ Earthing tag (optional)

Notice Pin out information for these connectors is included in section 5, Circuit Description.


1.7.4 Mechanical Parts List

The table below lists all mechanical parts which are not covered elsewhere in this manual. When ordering parts, please use the IPN and description.

240-02100-53 2 SKT PHONO PNL MTG NICKEL RED Rear panel - FWD PWR Base A and Base B

240-02100-54 2 SKT PHONO PNL MTG NICKEL BLK

Rear panel - REV PWR Base A and Base B

303-11208-00 1 CHASSIS TA703 CHANGEOVER UNIT Module Tray

303-23158-00 1 COVER TA703 CHANGEOVER UNIT Module top cover

316-06739-02 1 PNL FRT TA703 CHANGEOVER UNIT Module Front panel beige

316-06739-50 1 PNL FRT TA703 CHANGEOVER UNIT Module Front panel black

345-00040-09 10 SCRW M3*6MM CSK POZI TRUNCATE

345-00040-11 6 SCRW M3*10MM P/POZI ST BZ

345-00040-12 2 SCRW M3*10MM CSK POZI ST BZ

349-00020-46 2 SCRW M4X16MM P/POZ T/T BLK Rear panel - Relay Driver terminal block

352-00010-10 4 NUT M4 COLD FORM HEX ST BZ

354-01043-00 10 FASTENER 4-40 SCREW LOCK

369-00010-14 3 TIE CABLE NYLON 100*2.6MM Internal - PCB wiring

316-21260-01 1 PNL REAR TA703 CHANGEOVER UNIT Module rear panel

240-04030-29 BARRIER SCREW TO TAG T/B 4WAY Rear panel - relay driver t/b

W703-00-0000 1 WIRING KIT TA703-XX-XXXX Wires PCB to power input, relay driver output and FWD and REV PWR connectors.*

* Position and colours for these wires is included in section 7, Wiring

IPN Qty Description Where used


TA703-xx-xxxx Change Over Module Service Manual Setup and Installation 21 June 2014 © Tait Limited

2 Setup and Installation

This part contains information for installing the TA703-xx-xxxx Change Over Module with two base stations. It contains:■ Internal Setup■ Installation■ Rack Installation■ Connection to Typical Base■ Power Monitor Installation

2.1 Internal SetupThe Change Over Module requires the following selections to be made for correct setup. Refer to section 2.1.6, Internal Link Setting and section 2.1.7, Dip Switch and Test Point Location for further details.

2.1.1 Mode Select

Refer to section 1.6, Operating Modes.■ Mode A SW201-1 off, SW201-2 on■ Mode B SW201-1 on, SW201-2 off■ Mode C SW201-1 off, SW201-2 off■ Mode D SW201-1 on, SW201-2 on

2.1.2 Repeater Mode Versus Base Station Mode■ Close SW100-1 and SW100-2 to link Rx Audio to Tx Audio■ Close SW100-6 to link Rx Gate to Tx-Key

2.1.3 Forward and Reverse Power Measurements

There are two options for alarm detection in the TA703: ■ You can opt to use analog forward and reverse metering signals taken either from the PA or

from one or two external power monitors. In this case you need to open SW201-6 and SW201-7. This shuts out the digital alarm outputs from the PA. Always use external monitors for TB8100 and TB7100.

■ For T800 PAs, you can select the digital alarm signals generated in the PA. These signals are active high in the T800. The T800 forward power alarm goes high impedance when the forward power does not reach its required level.

22 Setup and Installation TA703-xx-xxxx Change Over Module Service Manual June 2014 © Tait Limited

Set SW201-6 and SW201-7 to close. In this case you may also need to adjust the alarm trigger level in the PA to the desired level. You must set the front panel trimmers on the Change Over Module for forward and reverse power alarm to 0.

■ For TB8100 PAs a task manager script needs to be written:■ If forward power low then activate Dig Output 1, ■ If reverse power high then activate Dig Output 2.

■ The TB7100 does not provide digital outputs reflecting the forward and reverse power status. External power monitor(s) have to be used instead.

2.1.4 Single External Power Monitor

When you have only one single external power monitor, close SW201-5 and SW201-8.

This links the inputs of Base A and Base B for both the forward and reverse power measurements

2.1.5 Alarm Outputs

There is one more selection to be considered with regard to the alarm outputs

SW400 and SW401 allows for a small variety in output settings. SW400 deals with the outputs of Base A, while SW401 does the same for Base B

When a switch on SW400 or SW401 is closed a 1k pull up resistor is connected to 13.8V. Refer to table SW400 in. Defaults is: no pull up.

2.1.6 Internal Link Setting

All internal link settings are by dip switch. Four dip switches SW100, SW201, SW400 and SW401 provide separate, adjustable internal links on the TA703-01-0000 PCB to allow the Change Over Module to perform as described in the table below. See the diagram on page on page 25 for dip switch locations.

Notice Some switches are unused.


SW100 (Shaded fields indicate default settings)

1-16 Repeater mode Base Station mode Repeater Audio +

2-15 Repeater mode Base Station mode Repeater Audio -

3-14 disable remote batt sense enable remote batt sense remote battery sense option

4-13 not connected

5-12 not connected

6-11 Repeater mode Base Station mode RxTx key

7-10 enable disable for testing Tx-key B Enable

8-9 enable disable for testing Tx-key A Enable

SW 201 (Shaded fields indicate default settings)

1-16 Modes B and D Modes A and C Operating mode

2-15 Modes A and D Modes B and C Operating mode

3-14 not used

4-13 not used

5-12 Rev Pwr inputs linked Rev Pwr inputs separate Reverse power input

6-11 enable Fwd Alm B I/P disable Fwd Alm B I/P Disable for Fwd and Rev power metering inputs

7-10 enable Fwd Alm A I/P disable Fwd Alm A I/P Disable for Fwd and Rev power metering inputs

8-9 Fwd Pwr inputs linked Fwd Pwr inputs separate Forward power input


1-16 Fwd Pwr A 1k to V+ pull up Fwd Pwr A open collector Fwd Pwr A pull up select

2-15 Rev Pwr A 1k to V+ pull up Rev Pwr A open collector Rev Pwr A pull up select

3-14 Mute A 1k to V+ pull up Mute A open collector Mute A pull up select

4-13 RSSI A 1k to V+ pull up RSSI A open collector RSSI A pull up select

5-12 PSU A 1k to V+ pull up PSU A open collector PSU A pull up select

6-11 not used

7-10 All Alm-A common Gnd All Alm A common float All Alm-A common select

8-9 All Alm A N/O 1k to V+ All Alm A N/O float All Alm-A pull up select

Switch on off comment

Switch on off comments




1-16 Rev Pwr B 1k to V+ Rev Pwr B open collector Rev Pwr B pull up select

2-15 Fwd Pwr B 1k to V+ Fwd Pwr B open collector Fwd Pwr B pull up select

3-14 Mute B 1k to V+ Mute B open collector Mute B pull up select

4-13 RSSI B 1k to V+ RSSI B open collector RSSI B pull up select

5-12 PSU B 1k to V+ PSU B open collector PSU B pull up select

6-11 not used

7-10 All Alm-B common to Gnd All Alm-B common float All Alm-B common select

8-9 All Alm-B N/O 1k to V+ All Alm-B N/O float All Alm-B pull up select



2.1.7 Dip Switch and Test Point Location

LM

JK

HF

GE

DC

BA

NP

QR

1 2 3 4 5 6 7

*C160

*C161 *C

162

*C163

*C164

*C165

*IC112

*R238

C100

C101

C102

C105

C105A

C105B

C106

C106A

C106B

C110

C114

C118

C120

C121

C122

C123

C126

C127

C128

C131

C200

C201

C203

C220 C221

C224

C228

C229

C232

C233

C237C238

C243

C244

C245

C246

C249

C253

C254

C257

C258

C320

C321

C322

C327

C328

C331

C332

C333

C335

C338

C339

C400

C401

C420

C421C422C423C424C425

C429

C430

C431

C432

C433

C436

C437 C438C439C440C441

C445

C446

C447

C448

C449

D100

D101

D102

D103

D107

D108

D109

D110

D112

D115

D202

D205

D210

D211

D300

D301

D302

D305

D306

D307D308

D311

D312

D313D314

D400

D401

D402

D403

D404

D405

D408

D409

D410

D411

D414

D415

D416

D417

D418

D419

FIDA

FIDB

IC100

IC101

IC102

IC105

IC106

IC109

IC110

IC111

IC200

IC201

IC202

IC203

IC204

IC207

IC300

IC301

IC400

IC401

P100

P101

P102

P103

P105

P106

P107

P108

P200

P202

P203

P204

P205

P208

P209

P210

P211

P213

P220

P221

PL1

PL2

PL3

PL4

Q100Q101

Q102

Q103

Q106

Q107

Q200

Q201

Q202

Q300

Q301

Q302

Q303

Q307

Q308

Q309

Q310

Q400

Q401

Q404

Q405

Q406

Q407

Q408

Q409

Q410

Q411

Q412

Q413

Q414

Q418

Q419

Q422

Q423

Q424

Q425

Q426

Q427

Q428

Q429

Q430

Q431

Q432

R105

R106

R120

R121

R127

R128

R135

R136

R137R138

R139 R140

R141

R142R143

R146 R147

R148

R149

R152

R153

R157

R158

R159

R213

R220 R221

R224

R228

R229

R230

R233

R234

R235

R236

R237

R239

R243

R244

R245

R246

R247

R248 R249

R250

R251

R252

R255

R256

R257

R258R259

R260 R261

R264

R266

R269

R270

R271

R272

R273

R274

R275

R276

R277 R278R279

R280

R281

R283

R284

R285

R286

R287

R288

R289

R290

R320

R321

R322

R323

R324

R325

R328

R329

R330

R331

R332

R333

R334

R335

R336

R337

R341

R342

R343

R344

R347

R348

R349

R350

R354

R355

R356

R357

R358

R359

R363

R364

R365

R366

R367

R368

R371

R372

R373

R374

R378

R379

R380

R381

R384

R385

R386

R387

R420

R421

R422

R423

R424

R425

R428 R429

R430

R431

R432

R433

R437 R438

R439

R450

R451 R452

R453

R454

R458 R459

R460

R461

R462 R463

R464

R465

R469

R470

R471

R472

R473

R474

R478 R479

R480

R481

R482

R483

R484 R485

R486

R487

R490 R491

R492

R493

R494 R495

R496

R497

R498 R499

R500

R501

RL100

RL101

RL102

RL103

RL400

RL401

RV100

RV101

RV102

RV203

RV204

RV205

RV206

RV

300

RV

301

SK

1

SW

100

SW

200

SW

201

SW

202

SW

400S

W401

THO

LE

TP300

TP301

TP302

TP305

TP310

TP311

TSLO

T

X200

RV

300

RV

301

SW400

TP300

TP305

SW201OFF

1 2 3 4 5 6 7 8

SW100OFF

1 2 3 4 5 6 7 8

OFF

1 2 3 4 5 6 7 8

OFF

1 2 3 4 5 6 7 8

Switch Block SW201

Switch Block SW100

Switch Block SW400

Switch Block SW401

TP305

TP300

RV300

RV301

SW401

TP311 TP311

TP310TP310

Re

se

tR

es

et

Ba

se

AB

Ac

tive

Ac

tive

Ac

tive

Ac

tive

Std

by

Std

by

TX

TX

RX

RX

RX

RX

Ba

se

BB

as

eB

Ba

se

AB

as

eA F

WD

FW

DF

WD

FW

DB

AT

TL

OW

BA

TT

LO

WR

EV

RE

VP

SU

PS

UR

SS

IR

SS

IR

SS

IR

SS

IM

UT

EM

UT

EM

UT

EM

UT

E


2.2 InstallationThe TA703-xx-xxxx Change Over Module is a 1U rack unit designed to be mounted in a standard 19” base station rack. It should be positioned between the two base stations it monitors, with Base A above and Base B below.

2.2.1 Power Monitor Options

The Change Over Module variants have several power monitor options.■ The Change Over Module can function with a single, or dual power monitors, depending upon

its application.■ Instead of a power monitor, the module may be configured to use the folloiwnign inputs:

■ The T800 50/100W Power Amplifier internal forward and reverse power detectors.■ The TB8100/9100 digital outputs under control of Task Manager.

Single Power Monitor

A single power monitor installed between the relay and the duplexer monitors power to the active base as designated by the relay.

Base A

Base B

TA703-xx-xxxxChange Over Module

SelectBaseRelay

PowerMonitor

To duplexerTx port


Dual Power Monitors

Where two power monitors are installed, they are fitted between each base and the relay.

Base A

Base B

TA703-xx-xxxxChange Over Module

SelectBaseRelay

To duplexerTx port

PowerMonitor

PowerMonitor

2.3 Rack InstallationThe TA703-01-0000 Change Over Module slides between the two base station racks from the front, and is secured in place by screws (not supplied) appropriate to the rack, through the slots at either end of the module front panel. Fibre washers are recommended to prevent damage to the front panel finish.

All connections between the Change Over Module and the two bases are made from the rear of the rack.

Like the two base stations, the module requires earthing, by connecting the earth tag on the module rear panel to the base station rack.


2.4 Connection to Typical Base

2.4.1 Installation Kits

Each Kit contains eight cables. Note that the IPN of the base station to Change Over Module cable is different for each kit variant.

2 x 15 way to 25 way D Range cableIPN 219-02702-01 (kit TA703-11-0010)IPN 219-02703-01 (kit TA703-11-0011)IPN 219-02700-01 (kit TA703-11-0012)IPN 219-03115-00 (kit TA703-11-7010)IPN 219-03460-00 (kit TA703-11-8010)

6 x N-type male to N-type male cableIPN 219-02701-00


2.4.2 Installation

This diagram shows the rear of a typical T800-50-0000 Backplane Base Station rack and the correct position of the wires and installation kit cables. Please note:■ the module has an earth tag which requires a wire connection to the rack frame■ the diagram shows connection details only (cable lengths are not to scale)■ the duplexer is shown fitted into Base A, but may be mounted on a separate tray above the

Change Over Module■ the splitter and relay can be mounted separately in one of the base station racks or on a separate

tray above the Change Over Module■ the duplexer-to-antenna cable is not supplied■ the wires connecting the relay to the relay driver outputs on the rear of the Change Over

Module are not supplied (details are on the following page)■ power monitor connections are documented later in this section.

REV (B)

FWD (B) FWD (A)

REV (A)

Modem Interface Alarms Out 4 Wire E&M Radio Interface (B) Radio Interface (A)

RXTX+13.8V +13.8VSelectbase


1

1

2

2

3

3

4

4

5

5

IPN 219-0270X-01

IPN 219-02701-00

IPN 219-02701-00

IPN

21

9-0

27

01

-00

BASE (A)BASE (A)

Rx

An

tT

x

IPN 219-02701-00

IPN 219-02701-00

IPN 219-0270X-01

IPN 219-02701-00

RxSplitter

Se

lec

tB

as

eR

ela

y

wires Earth tagwires to

rack


The table below describes placement of the connectors.

219-02701-00 N-Type to N-Type Cable RX(A) Receiver (A) rear socket

RX(B) Receiver (B) rear socket

TX (ANT) Duplexer Tx socket

Rx (ANT) Duplexer Rx socket

Tx (A) PA (A) rear socket

Tx (B) PA (B) rear socket

219-0270X-01* 15-way to 25-way D Range Cable Base (A) Backplane PCB SK7

Base (B) Backplane PCB SK7

* This IPN refers to 219-02700-01, 219-02702-01 or 219-02703-01.

Installation with TB7100 and TB8100

The set up for TB7100 and TB8100 is identical, except for the position of the 25-way connector. There is only one 25-way connector on each base station

Relay Installation - Select Base Station Function

The Relay requires hard-wiring to the rear panel terminal block (labelled Relay Driver Outputs). The table below shows which terminals to use.

Notice Applications without a duplexer require a second coaxial relay to perform the RxTx change over in simplex base station systems. This second relay connects to the remaining two relay terminals (labelled +13.8V and RxTx) in the same way as the first.

Cable IPN Cable Description TA703 Base Station

Relay Driver Outputs Terminal Relay

+13.8V Relay side terminal

Select Base Relay side terminal


The following instructions and diagram describe the correct installation procedure.

1. Cut two 7/0.2 PVC wires to required length.

Solder wires toside ring terminals

Fit wires to RelayDriver terminals

according to table

Fit wires from secondrelay (if used) to theseRelay Driver terminals

REV (B)

FWD (B) FWD (A)

REV (A)RXTX+13.8V +13.8VSelectbase


Se

lec

tB

as

eR

ela

y

wires

2. Strip both ends of each 10mm and tin.

3. Solder one wire to each of the relay side ring terminals.

4. Remove screw from Relay Driver Outputs terminal labelled +13.8V.

5. Fit one wire into terminal and replace screw.

6. Remove screw from Relay Driver Outputs terminal labelled Select Base.

7. Fit remaining wire into terminal and replace screw.

Notice Reverse Voltage Transient Protection diode is built into the TA703-01-0000 cir-cuitry.


2.5 Power Monitor InstallationA single, or pair of Power Monitors monitor transmitter forward and reverse power. The unit is placed in series with the Transmitter Antenna Cable, preferably after the duplexer. The kits provide for a choice of installation options: ■ installed directly in series with the antenna port of the duplexer via the barrel adapter provided ■ connected to the duplexer via the coaxial cable provided.

A second Power Monitor kit is required if Base A and Base B are monitored separately.

2.5.1 Power Monitor Kits - all variants

Each kit contains the following items:

2x Twin Phono/Phono CableIPN 219-00025-82

1x Dual Power MonitorIPN 009-00000-01 (30-88MHz)IPN 009-00000-02 (118-512MHz)IPN 009-00000-03 (806-960MHz)

1 x N-type male /N-type male adapterIPN 240-06020-04

1 x N-type male/N-type male cableIPN 219-02701-00

More details of the cables follow in section 7, Wiring.


2.5.2 Cable Installation

The power monitor connects via the twin phono/phono cable to the rear of the Change Over Module via either the A or B pair of RCA (phono) cable sockets at the rear of the module.

Notice The black RCA connector is for forward power measurement. The red RCA connec-tor is used for reverse power measurement

The Power Monitor also connects to the duplexer, and each kit provides two options to do this, either via an N-type to N-type adaptor, or using an N-type to N-type coaxial cable.

Two internal links on the Change Over Module PCB may require setting after installation. See Link Setting instructions that follow.

N-type Adapter Installation Option

The diagram below shows typical installation of a single Power Monitor using the N-type to N-type adapter

Modem InterfaceModem Interface AFWD (A)FWD (A)

REV (A)REV (A)

red phono plug to REV (A)

White (or black)phono plug to FWD

black(white) phono plug to FWD (A)

red phonoplug to REV

Power Monitor (Front)

antenna cable (notsupplied) to ANT socket

N-type Adapter toTRANS socket

N-type Adapterto DuplexerANT socket

Twin phono/phonocable IPN 219-00025-82

N-type AdapterIPN 240-06020-04

.


Cable Installation Option

The diagram below shows typical installation of a single Power Monitor using the N-type to N-type adapter.

red phono plug to REV (A)

White (or black) phono plug to FWD

black(white) phono plug to FWD (A)

red phono plug to REV

Power Monitor (Front)

antenna cable (not supplied) to ANT socket

Twin phono/phono cable IPN 219-00025-82

N-type plug to PowerMonitor TRANS socket

N-type plug to Duplexer ANT socket

N-type to N-typeCoaxial CableIPN 219-02701-00

Link Setting - Single Power Monitor

Where a single power monitor is used, the inputs of Base A and Base B must be linked together on the PCB. The correct position for the adjustable dip switches are: ■ SW201-5 ON■ SW201-8 ON


2.5.3 Installation - Two Power Monitors

A second Power Monitor is required if Base A and Base B are monitored separately. Where two power monitors are required, each Power Monitor connects via its twin RCA cable to the A and B pairs of RCA (phono) sockets on the rear of the Change Over Module.

Notice The black RCA connectors are for forward power measurement. The red RCA con-nectors are used for reverse power measurement.

From this point, installation will vary according to the individual base setup. For example, there may be either a single, or two duplexer, and a single, or two antennae. Follow the instructions for a single power monitor, noting that extra adaptation may be required.

Notice Link setting for two power monitors is different from the single power monitor set-ting. See below.

Link Setting - Two Power Monitors

Where two power monitors are used, the inputs of Base A and Base B must not be linked together on the PCB. The correct position for the adjustable dip switches are: ■ SW201-5 OFF■ SW201-8 OFF


TA703-xx-xxxx Change Over Module Service Manual Calibration and Testing 37 June 2014 © Tait Limited

3 Calibration and Testing

This part contains information for setting, calibrating and testing the TA703-xx-xxxx Change Over Module after initial installation or servicing. It contains:■ Calibration■ External Adjustments■ Test Procedure

3.1 CalibrationNotice All internal adjustments have been preset during manufacturing. If re-adjustment is required proceed as follows:

3.1.1 RSSI

Receiver RSSI output levels need to be set as per the instructions in the relevant base station service manual. The procedure that follows uses the UHF receiver as an example■ Apply a carrier to produce 2V DC at the RSSI input of the TA703-01-0000. For a correctly

setup UHF TB8100 and T800 receiver, that should occur at a RF input level of -110dBm, the RSSI level can be measured at TP310 for Base A and at TP311 for Base B. Otherwise disconnect the receiver and apply 2V to PL1-14 for Base A and 2V to PL2-14 for Base B. The levels in the TB7100 are lower than in the TB8100 and may require resistor changes on the TAQ703 PCB. If the voltages are too low, gain adjustments have to be made in the Change Over Module. Refer to IC201 in page two of the circuit diagram.

■ Put a DC voltmeter probe on TP300 or pin 1 of IC300 and adjust RV300 to read 2.6V■ Put a probe on TP305 or pin 7 of IC300 and adjust RV301 for a reading of 2.6V.

3.1.2 Verifying RSSI operation

1. Select Base A

2. Ensure that both Bases provide the same 2V RSSI voltage

3. Increase the RSSI voltage of Base B slowly, either by increasing the RF input or by increasing the simulated DC input. Stop when LED D300 on the PCB lights up and the TA703-xx-xxxx changes over.

4. This should take place around the 6dB increase in RF power or after a 0.4V increase in DC input.

5. Return the level to normal and reset system

6. Repeat steps 1 to 4 with Base A and B swapped. In this case LED D301 on the PCB lights up

38 Calibration and Testing TA703-xx-xxxx Change Over Module Service Manual June 2014 © Tait Limited

7. With Base A active, increase the RF level to both receivers until D302 turns off. Further increase the RF level to Base B by another 10dB. No change over should take place.

8. With Base B active, increase the RF level to both receivers until D302 turns off. Further increase the RF level to Base A by another 10dB. No change over should take place.

below -75dB

A=B off off on

A>B by 6dB off on on

B>A by 6dB on off on

above -75dB * * off * = undefined

3.1.3 Mute

The mute operation does not require any calibration in the TA703. It is important to set the mute opening levels as close together as possible. Due to the nature of the noise mute the receivers will probably never open at the same level. Setting the mute of the stand-by receiver slightly less sensitive than the active one by about 0.5dB will avoid unnecessary fault alarms on the active base under conditions with frequent low signal conditions. See “Rx-Gate Monitor (MUTE) - Modes A and C only” on page 51 and “Rx-Gate Monitor (MUTE) - Modes D only” on page 51 for further details of the mute.

3.1.4 Mute Operation

1. Ensure the Change Over Module is operating in Mode A or Mode C (SW200 1-16 OFF, SW200 1-15 ON), if the base station is used for maritime applications or very low density rural situations use Mode D.

2. Activate the Rx Gate by pulling either PL1 pin5 or PL2 pin 5 to ground for Base A or Base B respectively or, when the Change Over Module is connected to a base station you can apply a carrier to the receiver.

3. To check the mute alarm behaviour:Select Base A.Apply carrier (-100dBm or stronger) to Receiver A for at least 3 seconds.Remove the carrier.Wait a few seconds then apply the carrier again for at least three seconds. Repeat this process two more times (four times for Mode D). The mute alarm should activate.Now apply a carrier to both receivers simultaneously. The alarm should reset.

4. To test the mute of Base B repeat step 3 selecting Base B and applying carrier to Receiver B.

RSSI level D300 D301 D302 comment


3.1.5 Reverse Power

1. Activate the relevant transmitter by pulling either PL1 pin7 or PL2 pin 7 to ground for Base A or Base B respectively and check that it produces its nominal power into a 50 Ohm load. Alternately the relevant transmitter may be activated by placing the Change Over Module in repeater mode by closing SW100-6/11 and then apply a carrier to the relevant receiver that will activate the Rx Gate, this will pull down the Tx Key line and activate the transmit-ter.

Notice The carrier switch on the front panel of the base station Exciter/Transmitter does not activate the Tx Key lines in the Change Over Module and cannot be used for power calibration purposes.

2. Reduce the power to 25% of its nominal value. The forward power failure indictor will probably trigger and cause change over when power is reduced to such a low level.

3. Adjust front panel preset on the Change Over Module for the forward power failure trigger to avoid triggering.

4. Remove the termination/50 Ohm load.

5. Adjust front panel preset for the reverse power till the associated LED turns on.

3.1.6 Forward Power

1. Refit the 50 ohm load/termination to the PA.

2. Reduce the power to 50% of its nominal value.

3. Adjust front panel preset on the Change Over Module for the forward power till the associated LED turns on.

4. Reset PA power to nominal power.

3.1.7 Power Supply and Battery

1. Reduce power supply level to 10.8V

2. Adjust the front panel preset until the associated LED turns on

3.1.8 Repeater Audio: Receiver to Transmitter

For repeater setup, adjust receiver line output for -10dBm.


3.2 External AdjustmentsOnce installed, The TA703-01-0000 Change Over Module requires a series of adjustments. These adjustments must be carried out on a live system by introducing defined good conditions and defined error conditions.

3.2.1 Front Panel Adjustments - Base A

The adjustment trim pots are located just above the red LEDs on the left half of the Change Over Module front panel as shown.


Reset Base

A BActive Stdby TX RX FWD REV PSU RSSI MUTE Active Stdby TX RX FWD REV PSU RSSI MUTE BATT LOW

Base A Base B

Base selector switch

Reset button Base A Indicator LEDs

On front panel, select Base A.

Forward and Reverse Power Alarm Calibration

The calibration should take place in the fully setup system. When calibration starts it is assumed that the forward and reverse metering voltages are of reasonable level. That is, they should be similar to the nominal output levels of the PA operating at its nominal level even if the voltages are derived from external monitors. The Change Over Module has been designed for amplifiers with output levels in the range of 25 to 100 Watts.

If the voltages are too low, gain adjustments have to be made in the TA703. Refer to IC201 in the circuit diagram in section 6, PCB information and section 6.7, Circuit Diagram (227-70301-07) - page 2 of 2.

Reverse Power with 3dB 50 Ohm Attenuation■ Terminate the transmitter aerial output with a 3dB 50 Ohm attenuator. Do not terminate with

50 Ohm load. The termination represents a SWR of 3:1. Approximately 25% of the transmit power is reflected back into the transmitter.

■ Activate the transmitter by pressing the Tx Key button at the front of the exciter/transmitter.■ Adjust the reverse power change over level so that the Change Over Module just changes over.■ Change the termination of the transmitter back to 50 Ohm and press reset on the Change Over

Module.

Reverse Power without 3dB 50 Ohm Attenuation■ If no 3dB attenuator is available, adjust as in section 3.1.6, Forward Power.

Forward Power■ Activate the transmitter by pressing the Tx Key button at the front of the exciter/transmitter.■ Ensure that the power is set to the nominally required output power into a 50 Ohm load at the

aerial output.■ Turn the power level down to 60% of nominal output power.


■ Adjust the forward power change over level so that the Change Over Module just changes over.■ Re-adjust transmitter power to nominal power.

PSU

The PSU has been preset during manufacturing. If adjustment is required proceed as follows:■ Reduce the Supply voltage of Base A slowly to +10.5V.■ If the Change Over Module has not changed over adjust the PSU preset resistor. Note this

preset operates counter clockwise. To increase the PSU fault trigger level turn the preset counter clockwise.

■ Return supply level to nominal +13.8V

3.2.2 Front Panel Adjustments - Base B

The adjustment trim pots are located just above the red LEDs on the right half of the front panel of the Change Over Module.


Reset Base

A BActive Stdby TX RX FWD REV PSU RSSI MUTE Active Stdby TX RX FWD REV PSU RSSI MUTE BATT LOW

Base A Base B

Base selector switch

Reset button Base B Indicator LEDs

■ To test Base B, switch the base switch to position B and press the reset button.■ Repeat instructions for Base A (previous page).


3.3 Test ProcedureThe procedure below describes the tests carried out prior to shipping the product. Note that they specify the use of a Change Over Module Test Jig.

Set dip switches as in section 2, Setup and Installation, section 2.1.6, Internal Link SettingSet RSSI pots on test jig to mid levelSet Fwd Pwr pots to maxSet Rev Pwr pots to minSet all switches on test jig to off (white dot)Connect everything together as requiredUse independent power supplies for Base A and Base B. (Red banana socket on test jig is for second supply)

Initial test setup

Test Conditions Result

Audio path and C/O ■ Radio in Base mode

Base A and Base B ■ Turn supply on■ Select TA703 Base A Active■ On TA703 Active A LED ON■ On TA703 Standby B LED ON ■ Jig TX-A and RX-A LEDs ON■ Jig TX and RX Remote LEDs ON■ Measure impedance to gnd at TA703 Base Sel terminal High

■ Activate Jig Rx-B Gate sw■ Change over:■ Jig Active B LED on■ Jig TX-B and RX-B LEDs ON■ Jig TX and RX Remote LEDs ON■ Measure impedance to gnd at TA703 Base Sel terminal Low■ Switch TA703 to Base B and Reset

■ TA703 Active B LED ON■ TA703 Standby A LED ON

TX test Base A ■ Select Base A active■ Set Jig Fwd Pwr pot to max■ Activate Jig Tx RMT Key■ TA703 Green Tx LED Base A ON■ Turn Jig fwd pwr pot down to minimum ■ Change over:■ TA703 Green Tx LED Base B ON■ TA703 Fwd-A Alarm LED ON■ Turn Jig Tx RMT Key off ■ Reset system and set TA703 to Base B


Tx test Base B Base B active:■ Set Jig Fwd Pwr pot to max■ Activate Jig Tx RMT key ■ TA703 Green Tx LED Base B ON■ Turn Jig fwd pwr pot down to minimum■ Change over:■ TA703 Green Tx LED Base A ON■ TA703 Fwd-B Alarm LED ON■ Turn Jig Tx RMT B off ■ Reset system and select TA703 Base A

Remote Tx test Base A active:■ Activate Jig Remote Tx switch: SK1 ■ TA703 Tx Key Base A ON■ Activate Jig Remote Tx switch: PL3 ■ TA703 Tx Key Base A ON

Reverse Pwr Base A ■ Set Jig Rev Pwr pot A to max ■ Activate Jig Tx Key Base A ■ Change Over:■ Turn Jig Tx Key off ■ Reset system – Base A active■ Turn Jig Rev A switch on ■ Activate Jig Tx Key Base A ■ No Change Over:■ Set Jig Rev Pwr pot A to min ■ Reset system and set to Base B

Reverse Pwr Base B ■ Set Jig Rev Pwr pot B to max■ Activate Jig Tx Key Base B■ Change Over:■ Jig Turn Tx Key off■ Reset TA703 system■ Turn Jig Rev B pwr sw on■ Activate Jig Tx Key Base B■ No Change over:■ Set Jig Rev Pwr pot B to min

Receiver test ■ On TA703, select Base A:■ Activate Jig Rx-B Gate sw■ Change Over:■ Jig Mute A Alarm ON■ Reset TA703 system and select B

■ Activate Jig Rx-A Gate sw■ Change Over:■ TA703 Mute B Alarm ON■ Reset TA703 system and select A


Front panel setup

Fwd Pwr Base A setup ■ Setup 1V DC at I/O PAD213

Fwd Pwr Base B setup ■ Setup 1V DC at I/O PAD210

Rev Pwr Base A setup ■ Setup 1V DC at I/O PAD205

Rev Pwr Base B setup ■ Setup 1V DC at I/O PAD202

PSU Base A setup ■ Set Base A supply to 10.5V■ Adjust until PSU-A alarm first appears■ Reset voltage to 13.8V after test

PSU Base B setup ■ Set Base B supply to 10.5V■ Adjust until PSU-B alarm first appears■ Reset voltage to 13.8V after test

Battery test ■ Adjust Battery pot on test jig to min■ All Alarm relays start clicking■ Restore Jig battery voltage■ TA703 Relays stop clicking

Internal controls: RSSI setup

RSSI A setupT855 (-110dBm)T835/T825 -110dBm

■ Set 2.0V DC at RSSI A - R323/C320■ Set 3.8V DC at RSSI A - R323/C320■ Adjust RV300 to read 2.60V +/-.1V at IC300-1 TP300

RSSI B setupT855 (-110dBm)T835/T825 -110dBm

■ Set 2.0V DC at RSSI B - R356/C331■ Set 3.8V DC at RSSI B - R356/C331■ Adjust RV301 to read 2.6V +/-.1V at IC300-7/TP305

RSSI C/O ■ TA703, select Base A■ Set Jig RSSI A to minimum■ Set Jig RSSI B to max■ Activate Jig RX-A plus RX-B Gate■ Changeover:■ TA703 RSSI A Alarm LED ON

■ Select Base B Reset■ Set Jig RSSI B to minimum ■ Set Jig RSSI A to max■ Activate Jig RX-A plus RX-B Gate ■ Changeover: ■ TA703 RSSI B Alarm LED ON

TA703-xx-xxxx Change Over Module Service Manual Operation 45 June 2014 © Tait Limited

4 Operation

This part contains operating information for the TA703-xx-xxxx Change Over Module. It includes the following information:■ Front Panel Functions■ Standard Operation■ Change Over■ Fault Monitoring■ Base Station Selection

4.1 Front Panel FunctionsThe Change Over Module front panel has a series of LED indicators, switches, and preset resistors.


Reset Base

A B

Active Stdby TX RX FWD REV PSU RSSI MUTE Active Stdby TX RX FWD REV PSU RSSI MUTE BATT LOW

Base A Base B

Notice The upper base station is called Base A, the lower base station is Base B.

4.1.1 Switches

ResetA single poll, momentary push button switch which clears all alarms, returns the unit to its normal operating state, and resumes alarm sensing.On pressing the reset button, all LEDs (except the green TX and RX LEDs and the red Battery Alarm LED) illuminate for one second. After this, all LEDs resume normal oper-ation.

Base SelectBase Select switch selects and indicates the active base station. Selection depends on the selected mode and operation. In Mode A, the front panel Base Select switch, (or remote select) can be used to select the active base station.

Notice Mode B functions override this switch.

Notice In Mode B this applies to the Receiver only.

46 Operation TA703-xx-xxxx Change Over Module Service Manual June 2014 © Tait Limited

4.1.2 LED Indicators

Two identical sets of LED indicators provide the following signals for Base A and Base B.

Active Indicates the active transmitter

Stdby Indicates the standby transmitter

TX Indicates this transmitter has been keyed

RX Indicates the gate condition of this receiver

FWD Indicates a Forward Power error has occurred

REV Indicates a Reverse Power error has occurred

Mute Indicates a Rx mute error has occurred

Indicates an error has occurred

PSU Indicates a PSU error has occurred

A single red LED labelled Batt Low indicates battery power status for the system.

4.1.3 Preset Resistors

FWD, REV, PSU and Batt Low indicators each has front panel access to a preset resistor. While default levels are factory set, these resistors can be adjusted to suit individual system requirements.

4.2 Standard OperationNotice Base A is the normally active and Base B is the standby, unless stated otherwise.

4.2.1 Power Up

On power up, all LEDs (except green Tx and Rx LEDs and red Batt Low LED) light for one second.

After one second, only one Active and one Stdby (Standby) LED remains on, depending upon the Base switch setting. For example, when the Base switch is set to A, Base A will show its Active LED and Base B will show Stdby.

4.2.2 Transmitting

When a Tx-key is received via the 4 wire E&M connector, the green Tx LED for the active base will turn on.

LED Function


4.2.3 Receiving

When either receiver receives a carrier, the Rx Gate signal turns on the green Rx LEDs on the Active and Standby bases. This is because the receivers operate in parallel.

Notice In repeater mode, both Rx LEDs are on, but only Tx LED of the active base.

4.2.4 Change Over

At change over, one red LED (FWD, REV, PSU, , MUTE) of Base A lights to indicate the failure, and the unit changes over to Base B. Base B Active LED lights and its Stdby LED turns off. Base A Active and Standby LEDs are off.

4.2.5 Reset

Base B will remain active until Reset input is received, locally or remotely. Once reset, the module’s internal microprocessor returns operation to Base A and recommences its scan protocol for error conditions.

Notice This does not reset Batt Low indicator

4.2.6 Base Selection - Mode A, C and D Only

The Base switch on the front of the module allows a technician to select which base acts as the active one, by pointing the switch toward A or B, then pressing the reset button. The Active and Stdby LEDs swap when the Base switch is toggled.

4.3 Change Over

4.3.1 Manual Change Over - Mode A,C and D

On power up, the active base is determined by the position of the Base Select switch on the front panel of the module. Remote base selection is ignored until the first negative transient on the remote reset input.

Change over is either: ■ via the front panel with the base select switch, followed by a press of the reset button■ via the remote select and the remote reset input. Note that in Mode C and Mode D, remote

select automatically resets all alarms.


Both inputs have pull up resistors. The Remote Reset is active

Inputs

Remote Select

Remote Reset

Select A Select B

low.

4.3.2 Mode A Test Function

When the carrier button on the standby receiver or transmitter is pressed, the Change Over Module changes over for the duration of the press, provided the active transmitter is not busy. Alarm indicators and outputs are not latched.

When the standby base station Tx-Key is pressed, the module changes over and remains changed over until it is reset by the reset button on the front panel.

Notice If the test function detects a fault on the standby base station, the fault is indicated, but the base is no longer available as a standby until the fault is repaired and the module reset.

4.3.3 Manual Change Over - Mode B

Notice In this mode the front panel Base Select switch has no effect.

On power up the Change Over Module always defaults to Base A receiver. On presence of a signal, the module selects the receiver that unmutes first. No dedicated change-over input or key is available.

When the Change Over Module raises a Tx alarm, the operator must change over to the standby transmitter manually, via the Remote Select input.

Remote Select selects the transmitter■ RTS high: Active transmitter is in Base A■ RTS low: Active transmitter is in Base B

4.3.4 Automatic Change Over - Mode A, C and D

If the active base develops an error resulting in an alarm, the Change Over Module changes over to the standby base. This change over is final. If the new active base develops an alarm condition, the module will indicate the fault but will not switch back to the original base. A local or remote reset is required. If the standby base develops an error, it indicates a fault, but no change over occurs.

In Mode A, C and D, the Change Over Module automatically changes over under any one of the following conditions:■ PSU monitor indicates a failure


■ FWD PWR monitor indicates a failure■ RVS PWR monitor indicates a failure■ error detection indicates a failure■ RX-Gate monitor indicates a failure■ provided there is no PSU error on the standby base.

Conditions for each of these failure mechanisms is described in section 4.4, Fault Monitoring.

4.3.5 Automatic Change Over - Mode B

Notice In Mode B there is no automatic change over of the transmitters.

If the active receiver develops an error resulting in an alarm, the Change Over Module changes over to the standby receiver. This change over is final. If the newly active receiver develops an alarm condition, the module will indicate the fault, but will not switch back to the original active base until the system receives a local or remote reset. If the standby base developed an error, it indicates a fault, but no change over occurs.

In Mode B, the Change Over Module automatically changes the active receiver under either one of these conditions:■ error (A) detection indicates a failure■ RX-Gate (A) monitor indicates a failure

Conditions for each of these failure mechanisms is described in section 4.4, Fault Monitoring.

4.4 Fault MonitoringThe TA703-xx-xxxx Change Over Module monitors fault conditions in the base stations by polling the equipment at predetermined intervals. A predetermined number of consecutive faulty samples is required to activate an alarm and change over. The operating mode determines both polling intervals and consecutive samples as follows:

Mode A, Mode C and Mode D

Once every 20mS After eight consecutive fault samples (except Rx Gate mute, see Rx-Gate Monitor (MUTE) - Modes A and C only and Rx-Gate Monitor (MUTE) - Modes D only)

Mode Polling Alarms Activate

Mode B Once every 10mS After four consecutive fault samples


4.4.1 PSU Monitor (PSU)

Errors on either active or standby supply lines are indicated by the front panel indicators and signalled on the rear panel alarm connector. The alarm remains active until the front panel reset switch or remote reset signal is manually activated.

Both sides are monitored simultaneously. [Previous versions of the Change Over Module only monitored PSU levels for the Base station that was currently active].

The PSU alarm on the Change Over Module activates after the mode-specified consecutive samples indicate PSU voltage has fallen below the preset threshold.

The preset level is set on the front panel. Factory setting is 10.8V.

4.4.2 Forward Power Monitor (FWD)

Forward power is monitored for the active transmitter only, and only while the transmitter is keyed. FWD-PWR signals are polled at the mode-specific alarm polling interval. The FWD alarm on the Change Over Module activates after mode-specific consecutive samples indicate that forward power voltage has fallen below the preset threshold, or that a forward power alarm has been received from the active base. The alarm remains active until the front panel reset switch or remote alarm clear signal is manually activated.

The preset level is set on the front panel.

4.4.3 Reverse Power Monitor (REV)

Reverse power is monitored for active transmitter only, and only while the transmitter is keyed. The REV-PWR signals are polled at the mode-specific alarm polling interval. The REV alarm on the Change Over Module activates after mode-specific consecutive samples indicate that reverse power voltage has exceeded the preset threshold, or that a reverse power alarm has been received from the active base. The alarm remains active until the front panel reset switch or remote reset signal is manually activated.

The preset level is set on the front panel.

4.4.4 Error Detection ()

The output alarm on the Change Over Module activates after mode-specific consecutive samples (see table above) indicate an absolute difference of greater than 6dB. The alarm on the Change Over Module is activated for the base with the low .

signals are polled at mode-specific intervals only when the Rx gates are open and levels are below a preset level of -75 to -70dB.

The circuit goes into saturation above levels of around -70dB. When both signal are in saturation, the Change Over Module will not activate an alarm even when the difference between the signals is more than 6dB.


4.4.5 Rx-Gate Monitor (MUTE) - Modes A and C only

The Rx-Gate mute signals are polled at mode-specific alarm polling intervals. The mute alarm activates when discrepancies between the mutes of the two receivers are detected with the following criteria fulfilled:■ if the Rx-Gate of one base opens before the other base by more than 160ms (8 x 20ms), and■ if this open Rx-Gate remains open for at least one second, and■ the above two conditions occur in three consecutive activations of Rx-Gate.

If any of these conditions fail to occur, then the mute error count will be reset. This scheme was introduced with version 0703a532 Change Over Module software to reduce false alarms caused by low signal conditions or interference.

The mute alarm on the Change Over Module is indicated for the base with the Rx-Gate that has not opened or has opened too late.

An active base Rx-Gate mute fault will cause change over, but an Rx-Gate fault in a standby base will not. See “Mute Operation” on page 38 to check the Mute.

Notice The gate opening level of the active receiver is typically set 0.5 to 1dB more sensi-tive than the gate opening level of the standby receiver.

4.4.6 Rx-Gate Monitor (MUTE) - Modes D only

The Rx-Gate mute signals are polled at mode-specific alarm polling intervals. The mute alarm activates when discrepancies between the mutes of the two receivers are detected with the following criteria fulfilled:■ if the Rx-Gate of one base opens before the other base by more than 160ms (8 x 20ms), and■ if this open Rx-Gate remains open for at least three seconds, and■ the above two conditions occur in five consecutive activations of Rx-Gate, irrespective of time.

If any of these conditions fail to occur, then the mute error count will be reset.

Following the change over, if both mutes become active again within the three second window, the mute alarm is reset and the change over is cancelled.

If the change over was effected by a failure other than a mute alarm, the change over state will remain and the mute fault LED on the front panel will not be reset.

This scheme was introduced with version 0703a535 Change Over Module software to reduce false alarms caused by low signal conditions in rural or marine environments.

The mute alarm on the Change Over Module is indicated for the base with the Rx-Gate that has not opened or has opened too late.

An active base Rx-Gate mute fault will cause change over, but an Rx-Gate fault in a standby base will not. See “Mute Operation” on page 38 to check the Mute.

Notice The gate opening level of the active receiver is typically set 0.5 to 1dB more sensi-tive than the gate opening level of the standby receiver.


4.4.7 Combined Rx-Gate - Mode B only

This is a hardware function. Rx-Gate signals from both base stations are combined so that activity on either generates an interrupt to the microprocessor to determine if receiver change over is required.

4.4.8 Combined and Mute Alarm - Mode B only

An or RX-Gate alarm on either the active or standby receiver will cause the combined and Mute alarm (PL3 pin 13) to be activated.

An RX-Gate error on the active receiver will cause an alarm condition on both (active and RX-Gate (active) alarms.

An RX-Gate error occurring on the standby receiver will cause an alarm condition on both (standby) and RX-Gate (standby) alarms.

4.5 Base Station SelectionNotice Throughout this manual, the upper base is called Base A, the lower base is Base B. Base A is the normally active base and Base B the standby, unless stated otherwise.

Base station selection depends on the selected mode and operation. In Mode A the front panel Base Select switch (or remote select) selects the active base station. In Mode B this must be done remotely and the front panel Base Select is overridden.

4.5.1 Selection Following Error Condition - Mode A, C and D

When an error condition is detected on the active base, the transmitter and receiver pair will automatically switch the standby pair. When the system changes over, the source of the fault is indicated on the Change Over Module front panel indicators via the rear panel alarm connector.

Notice The faulty base station equipment will not be available as standby but alarm moni-toring continues on both base stations.

4.5.2 Selection Following Error Condition - Mode B

When an or mute error condition has been detected, the system will automatically switch to the fault-free receiver. This condition will remain until the front panel reset switch or a remote reset signal is manually activated.

Notice or mute errors will not affect transmitter selection.

Notice There is no automatic switching resulting from a PSU, FWD or RVS fault condition.

TA703-xx-xxxx Change Over Module Service Manual Circuit Description 53 June 2014 © Tait Limited

5 Circuit Description

This part describes the Change Over Module circuit operation. It contains the following information:■ Introduction■ Monitor Circuits■ Change Over■ External Connections

5.1 IntroductionInside the Change Over Module a single Control PCB, flush-mounted against the front panel, interfaces to the base stations and other equipment via D-range connectors on the back panel. Power monitor cables connect via RCA sockets on the back panel. A 4-way terminal block connects to two coaxial relays, one for base selection and one for the standard RX/TX change over function in base station applications.

The unit either identifies a fault condition in the active repeater, or compares a measure on the active repeater and a measure on the standby repeater.

Fault condition trigger levels can be set on preset resistors on the front panel of the unit. After change over, the unit displays the error on the LEDs. A reset button on the front panel allows the module to return to the situation before change over. A selector switch allows the technician to define which base is active and which is on standby.

A change over relay internal to the Change Over Module provides the means to switch the antenna as required. The receiver signals are derived from a low loss power splitter. An external directional coupler provides the DC signals for forward and reverse powers.

Internal dip switches provide setup to select repeater function and provide alarm outputs. See section3, Calibration and Testing for information.

The control board contains a 68HC705C8A microprocessor that controls the functions of the Change Over Module. Inputs and outputs to the microprocessor are as follows:■ Input comparators (PSU, FWD, RVS, )■ Direct logic inputs (Rx-Gate, TX -Key, Reset, Base Select, Remote Reset, Remote Select,

Mode Select)■ Rx gate selection input - IRQ■ Switches (Rx, TX, , Tx Audio, Rx Audio, Tx Key, Rx Gate, and Coaxial Relay)■ Direct logic outputs (Alarm)■ Alarm outputs

The remaining circuitry consists of power regulators and an optional DC-DC converter.

54 Circuit Description TA703-xx-xxxx Change Over Module Service Manual June 2014 © Tait Limited

5.2 Monitor CircuitsThe monitor circuits are:■ PSU and Battery■ Forward Power■ Reverse Power■

■ RX-Gate■ Tx-Key

5.2.1 PSU and Battery Input Comparators

Relevant circuitry: IC109, IC110 & IC111

The MC34064 is an under voltage sensing device. It features a comparator with precise thresholds and built-in hysteresis to prevent erratic reset operation.

RV100, RV101 and RV102 are set to activate their alarms when the input to the circuit drops below 10.8V

When the input to IC109-2 drops below 4.59v the output will indicate an alarm (logic ‘0’). The output will not deactivate until the voltage rises above 4.61v.

When a battery is connected to PL3-8 and the switch SW100-3-14 is selected open, IC111 will monitor the battery voltage. When the T703 is connected to the common rack supply and the SW100-3-14 is selected closed to monitor the common supply.

5.2.2 Forward Power Input Comparators

Relevant ICs: IC202 for FWD-PWR-A and FWD-PWR-B

IC 202 is a comparator IC with open collector output stages.

Adjustments: RV206 for Base A, RV205 for Base B

Base A component designators have been taken to describe the circuit in more detail.

Forward power alarms can be taken from an external power meter, or direct from the base station power amplifier stage.

With power meter signals, the FWD-PWR signal is high when the transmitter and antenna are operating efficiently and reduces when a fault condition occurs. When the FWD-PWR falls below the threshold voltage set by RV206 the comparator output is forced to 0v, indicating a FWD-PWR error.

The trigger level to generate an alarm is typically set at nominal power level -3dB


The power alarm can also be selected by the power transmitters alarm outputs. These outputs are normally shorted to Gnd and go high impedance to respond to digital outputs from the base stations when activated. In this configuration for instance, the generated alarm output is connected via PL2-6 and pulls low the alarm input to the microprocessor.

Notice RV206 should be tuned to 0V to ensure the IC202-1 output impedance is high.

Notice When power meter alarms are used, SW201 6-11 and SW201 7-12 are closed.

The controller reads the alarm input only when the associated Tx-Key is active.

5.2.3 Reverse Power Input Comparators

Relevant ICs: IC201 & IC202 for REV-PWR-A and REV-PWR-B. IC 202 is a comparator with open collector output stages.

Adjustments: RV204 for Base A, RV203 for Base B

Notice Base A components have been used to illustrate the circuit operation in more detail.

Notice Reverse power alarms can be taken from an external power meter, or direct from the base station power amplifier stage.

Notice These signals are not available in the TB7100 and TB8100 base stations.

The REV-PWR signal is low when transmitter and antenna are operating efficiently, and increases when a fault occurs. When REV-PWR raises above the threshold voltage set by RV204, comparator output is forced to +5V, indicating a REV-PWR error.

The alarm trigger level is typically set for 50% of power reflected back by terminating the transmitter antenna port with a 3dB open ended attenuator.

An alternative way for power alarm to be selected by using the base station power transmitters’ alarm outputs. These outputs are normally low and go high impedance when activated. In this configuration the digital alarm output should be connected to PL1 pins 6 and 8 and PL2 pins 6 and 8.

Notice When this type of alarm is selected, RV204 needs to be tuned to +5V to ensure that the output impedance of IC202-13 is high.

Notice When power meter alarms are used, ensure that REV-ALMA (PL1 pin 8) and REV-ALMB (PL2 pin 8) are not connected via the cable to transmitter alarm outputs.

The controller only reads the alarm input when the associated Tx-Key is active.


5.2.4 Input Comparators

Relevant ICs: IC300 & IC301

Adjustments: RV300 for Base A and RV301 for Base B

Receiver performance is measured in two ways: ■ both Rx-Gates must be unmuted. ■ the RF level of the stand-by receiver must be within + or - 6dB of the active receiver.

The RF level is translated into the voltage (Receiver Signal Strength Indicator). For an UHF receiver the output is set to 2.0V for a RF input level of -110dBm. For a VHF receiver, the output is 3.8V.

Mute monitoring is detailed later in this document.

Four comparators determine whether an error has occurred. These produce output signals PA3, PA7 and PB7. ■ PA3 is active low when -A is lower than a predetermined offset voltage below -B. LED D300

illuminates.■ PA7 is active low when -A is higher than a predetermined offset voltage above -B. LED D301

illuminates.■ PB7 is active low when either -A or -B is below a predetermined threshold. ■ decoders are outside their linear operating range when both A and B are above the threshold.

In this case no comparison is made and the system assumes operation of both receivers. LED D302 illuminates when of either A or B is below the threshold level.

signals are fed from a resistor divider network to non-inverting differential amplifier IC300 with a variable DC input offset provided by RV300 (RV13). The input stage gain is set by combining the resistor divider (approximately 0.68) and the non-inverting amplifier (approximately 2), giving a total input gain of approximately 1.3.

-A is fed into a temperature-compensated current mirror network that provides a constant current through R331 and R332 and hence a constant voltage drop across R331 and R332. R331 and R332 have about 0.48V across them. (6dB difference in RF level creates about 0.48V.)

When the non-inverting input (-A + offset) is greater than -B, the PA3 comparator goes into positive saturation. When -A + offset is less than -B, the comparator goes into negative saturation and LED1 illuminates.

The same principles apply to the PA7 comparator. When -A + offset is greater than -B, the comparator goes into negative saturation and LED2 illuminates.

Two comparators, whose outputs are open collector, drive PB7. Therefore if either -A or -B are below the threshold voltage set by R177 and R178 then PB7 will be effectively connected to ground.


5.2.5 RX-Gate Selection

Relevant components: Q307, Q309, IC100 and IC203

Adjustments: none

Both RX-Gate signals are via inverting level translators connected directly to the processor inputs. A transient detector circuit ensures each gate change triggers the interrupt input of the processor for fast detection.

The RX-Gate Select circuit indicates which receiver should be selected based on which RX Gate opens first. If neither gate is open, the switch defaults to the last selected receiver.

The output of the RX Gate Select circuit can control the RX Audio and RX switches directly, or, in the event of a fault for example, allow the microprocessor to override RX selection.

The logic for this circuit is derived from the following.

0 0 no change

0 1 1 (A opened first)

1 0 0 (B opened first)

1 1 Always defaults to Base A

5.2.6 TX-Key Inputs

Relevant circuitry: Q308, Q310, and Q106.

Tx-Key inputs are, like the Rx-Gate signals, connected to the microprocessor via level translating inverters. For simplicity, the Tx-Key signals are shorted to the Tx-Enable inputs of the Control PCB.

Remote Tx-Key input connects to the Tx-key of either Base A or Base B via the change over relay contacts. Remote Tx-Key signal directly drives the Rx/Tx change over relay in the base station applications.

The circuitry is designed for the Remote Tx-Key input to be connected to an open collector or relay contact to Gnd.

5.2.7 Direct Logic Inputs

RX-Gate, TX-Key, Reset, Base Select, Mode Select, Alarm clear, Remote select

Q307, Q308, Q309 and Q310 invert Rx-Gate and TX-Key signals before being fed to the microprocessor. Diodes protect the input stages against excessive input levels. Rx-Gate and TX-Key lines also drive the front panel LEDs. Both signals are active low.

Switches in series with Tx-Key are for test purposes only.

Rx Mute A Rx Mute B


Reset, Base Select and Mode Select input are driven from switches with pull-up resistors.

Remote Reset and Remote Select feed straight into the microprocessor by a diode protection and resistor pull-up arrangement.

Mode selection is controlled by SW6 8-way DIL switch as follows:

OFF ON Mode A

ON OFF Mode B

OFF OFF Mode C

ON ON Mode D

Notice If the mode setting is changed, the Change Over Module must be reset before it can assume its new configuration.

Notice Microprocessor pin 15 (PB2) is connected to SW201-3 but has a second function described in the section below.

5.2.8 Direct Logic Outputs (Alarm)

Relevant circuitry: Q200

Adjustments: none

There are two direct logic outputs ■ Alarm■ Alarm Tone Burst

In Mode A and B Alarm is active low and triggers when the difference between the level of Base A and Base B is more than 6dB. In Mode B only, this alarm also triggers with the Mute alarm or on either Base.

The Alarm Tone Burst is generated by the microprocessor at PB2 (pin 15) when an alarm condition occurs. This output produces a tone burst at 3 second intervals when an alarm condition exists. The outputs need to be connected to either RX or TX Audio lines if necessary.

SW201-3 is always OFF. During power up, the microprocessor reads PB2 as an input. As SW201-3 is OFF it will not cause a conflict after power up when PB2 is setup as an output.

5.2.9 Alarm Outputs

Relevant circuitry: IC400, IC401, Q400 to Q414 and Q418 to Q432

Adjustments: none

Alarm outputs can be configured as either open collector or active low with a source resistor to +13.8V.

SW201-1 SW201-2 Mode


The All Alarm for Base A and Base B has closed contacts in the non-alarm state and can be configured as:■ Dry relay contact to Gnd - All2A switched to Gnd■ Closure of two dry relay contacts - All1A shorts to All2A■ With source resistor to +13.8V, hard wired to All1A

Alarm outputs available:■ All Alarm, activates when any of the standard alarm conditions are met■ Fwd Pwr, activates when the level stays below to minimum set.■ Rev. Pwr, activates when the level exceeds a maximum set■ Mute, activates when the other mute gets active and this one not■ , activates when this is more than 6dB below the other one■ PSU, activates when the level stays below minimum set, typically 10.8V

These alarms are open collector to Gnd with an optional 1k resistor to +13.8V

5.2.10 Battery Alarm

When the battery drops below its preset alarm trigger level both ALL relays - RL400 and RL 401 - start a continuous on-off cycle of 600/600mS. If a power supply then drops below the trigger level the cycle changes to continuous alarm on the relay of the base with the faulty supply (contacts open when alarm raised).

Notice In the non-alarm state the ALL Alarm relays are normally powered up

Notice When no battery is connected, to prevent the Change Over Module from triggering the “low battery” alarm, SW100-3 should be closed connecting the V+ Batt input to the 13.8V supply.


5.2.11 Signal Polarity

Rx Gate Input Active low

TX Key Output Active low

Rx Mute Input Active low

Fwd Pwr Alarm Input Active high

Rev Pwr Alarm Input Active high

Remote Select Input ‘1’ – Base A; ‘0’ – Base B

Remote Reset Input Active low

alarm Output Active low

CO relay Output Active low

SR_ALL Output select: contact closure, short to Gnd, pull up to +

SR_individual Output active low, select: pull up to +

5.3 Change Over

5.3.1 Change-Over Switches

Relevant circuitry: IC100, IC101, RL100, RL101, RL 102, RL 103, IC102 and Q106

Adjustments: none

The following signals are changed over:■ 2 wire Rx Audio■ 2 wire Tx Audio■ Rx Gate (= Rx Mute)■ Tx-Key (= Tx-Enable)■ Select Base Coaxial Relay

Latching relays are used for all switching. If power disappears from the Change Over Module, the latched relay contacts ensure that all 4 wire plus E&M signalling remains connected to the selected base.

5.3.2 Change Over Control

Latching relays are driven by the microprocessor with two lines for direction (DIR_PC0 and DIR_PC2) and one line to control (CNTRL_PC1). To change over, the control line must be pulsed

Function I/O Comment


high for one polling cycle.

low sel Base A: Rx Aud, Rx-Gate, sel Base A Tx Aud, Tx-Key, Coax Relay

high sel Base B: Rx Aud, Rx-Gate, sel Base B Tx Aud, Tx-Key, Coax Relay

Rx/Tx Change-over Relay switches from the remote Tx-Key input

PC1 Direction PC0 ⇑ PC2 ⇑


5.4 External Connections

5.4.1 PL1 and PL2 15-way D-ranges (Base A and Base B

1 RX Audio + Input transparent

2 RX Audio - Input transparent

3 TX Audio + Input transparent

4 TX Audio - Input transparent

5 RX-Gate Input RX Gate

6 Fwd Pwr Alarm Input Active High

7 TX Key Output Open collector 10mA sink impedance

8 Rev Pwr Alarm Input Active high

9

10 Tx Enable Input Shorted to TX Key

11 Fwd Pwr level Input Output

12 Rev Pwr level Input Output

13 PSU Input PSU monitoring. Optionally to supply power to TA703-xx-xxxx module.

14 Input

15 GND Gnd

5.4.2 PL3 15-way D-range (4 Wire E&M)

This connector is the interface point between the base station system and the remote console. It is wired as follows:

1 Rx-Audio + Transparent

2 Rx Audio - Transparent

3 Tx Audio + Transparent

4 Tx-Audio - Transparent

5 Rx-Gate O/P Active low upon receive of valid carrier

6 Rx-Gate (spare) not used

7 Remote Tx-Key Active low input to transmit

8 V+ Battery Input to Battery Alarm Circuit

9 Combined Audio + Balanced output to voice logger - future development

10 Combined Audio - Balanced output to voice logger - future development

11 Active Displays level of active base

12 Remote Reset (RAC) Driven by open collector 10mA sink capability

13 Alarm Open collector 10mA sink

14 Remote Select High = TX of Base A, Low = TX of Base B.

15 Gnd

Pin Function I/O Comment

Pin Function Description


5.4.3 PL4 15-way D-range (Alarm Outputs)

1 contact between pin 1 and pin 2 opens on any alarm activated in Base A

refer to internal links for options on all alarm outputs

2

3 open collector. Active low when Fwd Pwr of Base A fails

4 open collector. Active low when Rev Pwr of Base A fails

5 open collector. Active low when Mute of Base A fails

6 open collector. Active low when of Base A fails

7 open collector. Active low when PSU of Base A fails

8 Gnd

9 contact between pin 9and pin 10 opens on any alarm activated in Base B10

11 open collector. Active low when Fwd Pwr of Base B fails

12 open collector. Active low when Rev Pwr of Base B fails

13 open collector. Active low when Mute of Base B fails

14 open collector. Active low when of Base B fails

15 open collector. Active low when PSU of Base B fails

5.4.4 SK1 25-way D-range (Modem Interface)

This socket interfaces to external equipment and RS-232 for Data Terminal Equipment.

Pin Alarm Comments

Pin Signal Function

1 FRAME GND Earth to Chassis

2 TD Transmitted data - RS-232

3 RD Received data - RS-232

4 N/C

5 N/C

6 N/C

7 SG-GND RS-232 - Ground

8 N/C

9 GND

10 GND

11 N/C

12 V+ OUTFrom optional DC-DC converter13 V+ OUT

14 REMOTE RX LINE +600 Ohm balanced audio from receiver15 REMOTE RX LINE -

16 REMOTE TX LINE +600 Ohm balanced audio to transmitter17 REMOTE TX LINE -

18 RX GATE OUT Copy from active receiver gate O/P

19 REMOTE TX KEY Active low input to key active transmitter

20 N/C


5.4.5 XLR Plug

This connector provides the power input (13.8V, 1.2A maximum).

1 +ve

2 +ve

3 Ground

4 Ground

21 O/P Analog level from receiver

22 N/C

23 RMT_ SELECT Forces change over to standby transmitter

24 V+ OUTFrom optional DC-DC converter25 V+ OUT

Pin Function

TA703-xx-xxxx Change Over Module Service Manual PCB information 65 June 2014 © Tait Limited

6 PCB information

This part contains information for the Change Over Module Control PCB (IPN 227-70301-07). It contains the following information:■ Introduction■ SMD Parts List (227-70301-07)■ Non-SMD Parts List (227-70301-07)■ PCB Layout (227-70301-07) - top side■ PCB Layout (227-70301-07) - bottom side■ Circuit Diagram (227-70301-07) - page 1 of 2■ Circuit Diagram (227-70301-07) - page 2 of 2■ Circuit Diagram (227-70301-07) - page 3 of 4■ Circuit Diagram (227-70301-07) - page 4 of 4

6.1 Introduction

6.1.1 Parts Lists

The 10 digit numbers (000-00000-00) in the parts lists are ‘internal part numbers’ (IPNs). Your spare parts orders can be handled more efficiently if you quote: equipment type, circuit reference and IPN, along with a brief description of the part. The components listed in the parts lists are divided into two main types: those with a circuit reference (e.g. C201, D106, R121, etc.) and those without (mechanical and miscellaneous). Those with a circuit reference are grouped firstly by PCB, then by circuit designation in numerical order.

Each component entry comprises three or four columns: the circuit reference, variant number (if applicable), IPN and description. A number in the variant column indicates that this particular component is fitted only to that variant. The miscellaneous and mechanical section lists the variant and common parts in IPN order.

6.1.2 Grid Reference Indexes

To assist in locating components and labelled pads on the PCB layouts and circuit diagrams, a component grid reference index has been provided. This index lists the components and pads in alphabetical order, along with the appropriate alphanumeric grid references.

The first digit in the circuit diagram reference is the sheet number, and the last two characters give the location of the component on that sheet. The

66 PCB information TA703-xx-xxxx Change Over Module Service Manual June 2014 © Tait Limited

first digit in the PCB layout reference is a ‘1’ or ‘2’, indicating the top or bottom side layout respectively, and the last two characters give the location of the component on that diagram.

6.1.3 Using CAD Circuit Diagrams

Reading a CAD circuit diagram is similar to reading a road map, in that both have an alphanumeric border. The circuit diagrams in this Manual use letters to represent the horizontal axis, and numbers for the vertical axis. These circuit diagram ‘grid references’ are useful in following a circuit that is spread over two or more sheets. When a line representing part of the circuitry is discontinued, a reference will be given at the end of the line to indicate where the rest of the circuitry is located. The first digit refers to the sheet number (printed on the bottom right hand corner of the CAD diagram) and the last two characters refer to the location on that sheet of the continuation of the circuit (e.g. 1-D4). If more than one line is represented (indicated by a double thickness line), a dot with a reference label will follow the route each individual line represents.


6.2 SMD Parts List (227-70301-07)

Ref IPN Description PCB SchematicC100 015-26100-08 CAP 100N 10% 50V X7R 1:G3 1-J0C101 015-26100-08 CAP 100N 10% 50V X7R 1:C5 1-K0C102 015-26100-08 CAP 100N 10% 50V X7R 1:E5 1-G0C105 016-09100-05 CAP 100U ELEC 25V 20% SIZE 8.5*9.2MM 1:B4 1-P8C105A 016-08100-01 CAP 10U ELEC 16V 4*5.7MM 1:C5 1-Q8C105B 015-26100-08 CAP 100N 10% 50V X7R 1:C5 1-Q8C106 016-09100-05 CAP 100U ELEC 25V 20% SIZE 8.5*9.2MM 1:B5 1-P6C106A 016-08100-01 CAP 10U ELEC 16V 4*5.7MM 1:C5 1-Q6C106B 015-26100-08 CAP 100N 10% 50V X7R 1:C5 1-Q6C110 015-24100-08 CAP 1N0 5% 50V X7R 1:E4 1-Q5C114 015-24100-08 CAP 1N0 5% 50V X7R 1:E5 1-Q4C118 015-24100-08 CAP 1N0 5% 50V X7R 1:R2 1-Q2C120 015-25100-08 CAP 10N 10% 50V X7R 1:G3 1-D6C121 015-25100-08 CAP 10N 10% 50V X7R 1:G3 1-D5C122 015-25100-08 CAP 10N 10% 50V X7R 1:D5 1-D4C123 015-25100-08 CAP 10N 10% 50V X7R 1:C5 1-D4C126 015-23100-01 CAP 100P 5% NPO 50V 1:E6 1-K6C127 015-24100-08 CAP 1N0 5% 50V X7R 1:F6 1-L7C128 015-24100-08 CAP 1N0 5% 50V X7R 1:F6 1-L6C131 016-08100-01 CAP 10U ELEC 16V 4*5.7MM 1:C4 1-R8*C160 016-09220-01 CAP 220U ELEC 35V 10.5MM SQ SMD 1:Q5 1-M1*C161 016-09100-05 CAP 100U ELEC 25V 20% SIZE 8.5*9.2MM 1:P5 1-N1*C162 016-07100-01 CAP 1U0 ELEC 16V 4*5.7MM 1:P6 1-N1*C163 016-09470-01 CAP 470U ELEC 16V 10.5MM SQ SMD 1:R5 1-Q1*C164 016-09100-05 CAP 100U ELEC 25V 20% SIZE 8.5*9.2MM 1:R5 1-Q1*C165 016-07100-01 CAP 1U0 ELEC 16V 4*5.7MM 1:R6 1-Q1C200 015-26100-08 CAP 100N 10% 50V X7R 1:F4 2-K7C201 015-26100-08 CAP 100N 10% 50V X7R 1:C3 2-K0C203 015-26100-08 CAP 100N 10% 50V X7R 1:G4 2-L0C220 015-26100-08 CAP 100N 10% 50V X7R 1:G4 2-G7C221 015-26100-08 CAP 100N 10% 50V X7R 1:G4 2-G6C224 015-24100-08 CAP 1N0 5% 50V X7R 1:F4 2-L7C228 015-24470-08 CAP 4N7 10% 50V X7R 1:B4 2-B6C229 016-08100-01 CAP 10U ELEC 16V 4*5.7MM 1:N3 2-E5C232 015-24470-08 CAP 4N7 10% 50V X7R 1:B4 2-B4C233 016-08100-01 CAP 10U ELEC 16V 4*5.7MM 1:G2 2-E3C237 015-22220-01 CAP 22P 5% NPO 50V 1:F5 2-J3C238 015-22220-01 CAP 22P 5% NPO 50V 1:F4 2-J3C243 016-08100-01 CAP 10U ELEC 16V 4*5.7MM 1:K4 2-P6C244 016-08100-01 CAP 10U ELEC 16V 4*5.7MM 1:K4 2-P6C245 016-08100-01 CAP 10U ELEC 16V 4*5.7MM 1:K4 2-Q6C246 016-08100-01 CAP 10U ELEC 16V 4*5.7MM 1:K4 2-Q6C249 015-24100-08 CAP 1N0 5% 50V X7R 1:G4 2-N4C253 015-24470-08 CAP 4N7 10% 50V X7R 1:A4 2-B2C254 016-08100-01 CAP 10U ELEC 16V 4*5.7MM 1:N3 2-E2C257 015-24470-08 CAP 4N7 10% 50V X7R 1:B4 2-B1C258 016-08100-01 CAP 10U ELEC 16V 4*5.7MM 1:F2 2-E0


C320 015-24100-08 CAP 1N0 5% 50V X7R 1:F6 3-A6C321 015-25470-08 CAP 47N 10% 50V X7R 1:F6 3-B6C322 015-23100-01 CAP 100P 5% NPO 50V 1:G6 3-C8C327 015-24100-08 CAP 1N0 5% 50V X7R 1:E2 3-J8C328 015-24100-08 CAP 1N0 5% 50V X7R 1:E2 3-J6C331 015-24100-08 CAP 1N0 5% 50V X7R 1:F6 3-A4C332 015-25470-08 CAP 47N 10% 50V X7R 1:G6 3-B4C333 015-23100-01 CAP 100P 5% NPO 50V 1:G5 3-C5C335 016-07100-01 CAP 1U0 ELEC 16V 4*5.7MM 1:G5 3-E3C338 015-24100-08 CAP 1N0 5% 50V X7R 1:L2 3-J5C339 015-24100-08 CAP 1N0 5% 50V X7R 1:L2 3-J3C400 015-26100-08 CAP 100N 10% 50V X7R 1:J4 4-D9C401 015-26100-08 CAP 100N 10% 50V X7R 1:N3 4-D4C420 015-24100-08 CAP 1N0 5% 50V X7R 1:K4 4-H8C421 015-24100-08 CAP 1N0 5% 50V X7R 1:J4 4-G7C422 015-24100-08 CAP 1N0 5% 50V X7R 1:J4 4-J6C423 015-24100-08 CAP 1N0 5% 50V X7R 1:J4 4-L6C424 015-24100-08 CAP 1N0 5% 50V X7R 1:J3 4-M5C425 015-24100-08 CAP 1N0 5% 50V X7R 1:J3 4-P5C429 015-24100-08 CAP 1N0 5% 50V X7R 1:H6 4-Q7C430 015-24100-08 CAP 1N0 5% 50V X7R 1:H6 4-Q7C431 015-24100-08 CAP 1N0 5% 50V X7R 1:H6 4-Q6C432 015-24100-08 CAP 1N0 5% 50V X7R 1:H6 4-Q6C433 015-24100-08 CAP 1N0 5% 50V X7R 1:G6 4-Q5C436 015-24100-08 CAP 1N0 5% 50V X7R 1:N4 4-H3C437 015-24100-08 CAP 1N0 5% 50V X7R 1:M4 4-G2C438 015-24100-08 CAP 1N0 5% 50V X7R 1:M4 4-J2C439 015-24100-08 CAP 1N0 5% 50V X7R 1:M4 4-L1C440 015-24100-08 CAP 1N0 5% 50V X7R 1:M3 4-M1C441 015-24100-08 CAP 1N0 5% 50V X7R 1:M3 4-P0C445 015-24100-08 CAP 1N0 5% 50V X7R 1:H6 4-Q3C446 015-24100-08 CAP 1N0 5% 50V X7R 1:H6 4-Q2C447 015-24100-08 CAP 1N0 5% 50V X7R 1:H6 4-Q1C448 015-24100-08 CAP 1N0 5% 50V X7R 1:H6 4-Q1C449 015-24100-08 CAP 1N0 5% 50V X7R 1:G6 4-Q0D100 001-10011-74 DIODE MRA4004T3 PWR RECTIFIER 400V 1A CASE 403B-01 1:C6 1-D7D101 001-10011-74 DIODE MRA4004T3 PWR RECTIFIER 400V 1A CASE 403B-01 1:C6 1-D6D102 001-10011-74 DIODE MRA4004T3 PWR RECTIFIER 400V 1A CASE 403B-01 1:D5 1-D5D103 001-10011-74 DIODE MRA4004T3 PWR RECTIFIER 400V 1A CASE 403B-01 1:D5 1-D4D107 001-10011-74 DIODE MRA4004T3 PWR RECTIFIER 400V 1A CASE 403B-01 1:P6 1-J3D108 001-10011-74 DIODE MRA4004T3 PWR RECTIFIER 400V 1A CASE 403B-01 1:P6 1-L4D109 001-10011-74 DIODE MRA4004T3 PWR RECTIFIER 400V 1A CASE 403B-01 1:E5 1-Q5D110 001-10011-74 Diode SMD MRA4004T3 1A/400v 1:E5 1-Q4D112 001-10011-74 DIODE MRA4004T3 PWR RECTIFIER 400V 1A CASE 403B-01 1:E5 1-Q4D202 001-10000-99 DIODE BAV99 DUAL SW (PIN 3 IS ANODE/CATH) 1:F4 2-L7D205 001-10000-99 DIODE BAV99 DUAL SW (PIN 3 IS ANODE/CATH) 1:G4 2-M4D210 001-10000-99 DIODE BAV99 DUAL SW (PIN 3 IS ANODE/CATH) 1:C4 2-G2D211 001-10000-99 DIODE BAV99 DUAL SW (PIN 3 IS ANODE/CATH) 1:B4 2-G0D300 008-10065-00 LED HSMG-C650 GREEN SMD 1:E4 3-F8D301 008-10065-00 LED HSMG-C650 GREEN SMD 1:F4 3-G8

Ref IPN Description PCB Schematic


D302 008-10065-00 LED HSMG-C650 GREEN SMD 1:G4 3-G8D305 001-10000-99 DIODE BAV99 DUAL SW (PIN 3 IS ANODE/CATH) 1:E2 3-K8D307 001-10000-99 DIODE BAV99 DUAL SW (PIN 3 IS ANODE/CATH) 1:E2 3-K7D311 001-10000-99 DIODE BAV99 DUAL SW (PIN 3 IS ANODE/CATH) 1:L2 3-K5D313 001-10000-99 DIODE BAV99 DUAL SW (PIN 3 IS ANODE/CATH) 1:L2 3-K3D400 001-10011-74 DIODE MRA4004T3 PWR RECTIFIER 400V 1A CASE 403B-01 1:L1 3-L3D414 001-10011-74 DIODE MRA4004T3 PWR RECTIFIER 400V 1A CASE 403B-01 1:N4 4-H4IC100 002-10040-01 IC 4001BT QUAD 2 I/P NOR 1:G3 1-C6IC101 002-10040-01 IC 4001BT QUAD 2 I/P NOR 1:D5 1-C5IC102 002-10227-20 IC TLC2272CD DUAL CMOS OP AMP 1:E5 1-H0IC105 002-10078-08 IC 78L08CD +VE VOLTAGE REG 8V 100MA 1:B4 1-P8IC106 002-10078-05 IC 78L05CD REG 5V 100MA 1:B5 1-P6IC109 002-10340-64 IC MC34064D-5 LOW VOLTAGE INDICATOR 1:F4 1-P5IC110 002-10340-64 IC MC34064D-5 LOW VOLTAGE INDICATOR 1:E4 1-P4IC111 002-10340-64 IC MC34064D-5 LOW VOLTAGE INDICATOR 1:Q2 1-P2IC200 240-04020-42 SKT SMD FOR A PLCC44 CHIP CARRIER 1:F4 2-J4IC201 002-10003-24 IC LM324D QUAD OP AMP 1:C4 2-C6IC202 002-10339-00 IC SMD LM339D QUAD COMPARATOR 1:D3 2-E5IC203 002-74900-86 IC 74HC86T QUAD 2I/P EXCLUSIVE-OR GATE 1:G4 2-F6IC204 002-10340-64 IC MC34064D-5 LOW VOLTAGE INDICATOR 1:A3 2-K8IC207 002-10002-32 IC MAX232 / RS-232 RECEIVER/TRANSMITTER 1:K4 2-P5IC300 002-10003-24 IC LM324D QUAD OP AMP 1:G6 3-D1IC301 002-10339-00 IC SMD LM339D QUAD COMPARATOR 1:G5 3-F6IC400 002-74905-95 IC 74HC595S 8-BIT SHIFT REG 1:J4 4-C7IC401 002-74905-95 IC 74HC595S 8-BIT SHIFT REG 1:N4 4-C2Q100 000-10330-60 TRANSISTOR ZVN3306F LOW PWR N-CHAN MOSFET 1:G4 1-D6Q101 000-10330-60 TRANSISTOR ZVN3306F LOW PWR N-CHAN MOSFET 1:G3 1-D5Q102 000-10330-60 TRANSISTOR ZVN3306F LOW PWR N-CHAN MOSFET 1:D5 1-D5Q103 000-10330-60 TRANSISTOR ZVN3306F LOW PWR N-CHAN MOSFET 1:D5 1-D4Q106 000-10008-57 TRANSISTOR BCW70/BC857 PNP AF SMALL SIG 1:P6 1-L4Q107 000-10330-60 TRANSISTOR ZVN3306F LOW PWR N-CHAN MOSFET 1:P6 1-L3Q200 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:G4 2-N6Q201 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:D4 2-E2Q202 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:D4 2-E0Q300 000-10008-57 TRANSISTOR BCW70/BC857 PNP AF SMALL 1:F5 3-D8Q301 000-10008-57 TRANSISTOR BCW70/BC857 PNP AF SMALL 1:F5 3-D8Q302 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:F5 3-D6Q303 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:F5 3-D6Q307 000-10008-57 TRANSISTOR BCW70/BC857 PNP AF SMALL 1:E2 3-L9Q308 000-10008-57 TRANSISTOR BCW70/BC857 PNP AF SMALL 1:E2 3-L7Q309 000-10008-57 TRANSISTOR BCW70/BC857 PNP AF SMALL 1:L2 3-L5Q310 000-10008-57 TRANSISTOR BCW70/BC857 PNP AF SMALL 1:L2 3-L3Q400 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:D2 4-E7Q401 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:D2 4-E5Q404 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:K4 4-H8Q405 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:F2 4-G7Q406 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:J4 4-H7Q407 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:G2 4-H7Q408 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:J4 4-J7Q409 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:H2 4-K6



Q410 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:J4 4-L6Q411 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:H2 4-M6Q412 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:J3 4-N6Q413 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:G2 4-P5Q414 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:J3 4-Q5Q418 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:K2 4-E2Q419 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:K2 4-E0Q422 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:N4 4-H3Q423 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:M2 4-G2Q424 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:M4 4-H2Q425 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:N2 4-H2Q426 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:M4 4-J2Q427 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:P2 4-K1Q428 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:M4 4-L1Q429 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:P2 4-M1Q430 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:M3 4-N1Q431 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:N2 4-P0Q432 000-10008-17 TRANSISTOR BCX19/BC817 NPN AF LOW POWER 1:M3 4-Q0R105 036-14470-10 RES 4K7 1% 1:C5 1-Q8R106 036-14220-00 RES 2K2 5% 1:C5 1-Q6R120 036-16100-10 RES 100K 1% 1:G3 1-C6R121 036-16100-10 RES 100K 1% 1:G3 1-C6R127 036-16100-10 RES 100K 1% 1:D5 1-C5R128 036-16100-10 RES 100K 1% 1:D5 1-C4R135 036-15470-10 RES 47K 1% 1:F6 1-H7R136 036-15470-10 RES 47K 1% 1:E6 1-J7R137 036-15470-10 RES 47K 1% 1:F6 1-H6R138 036-15470-10 RES 47K 1% 1:F5 1-J6R139 036-16100-10 RES 100K 1% 1:E6 1-J7R140 036-15470-10 RES 47K 1% 1:E6 1-K6R141 036-15470-10 RES 47K 1% 1:E6 1-K6R142 036-15100-10 RES 10K 1% 1:C4 1-R8R143 036-15100-10 RES 10K 1% 1:C4 1-R8R146 036-15100-10 RES 10K 1% 1:E4 1-P5R147 036-14390-10 RES 3K9 1% 1:E4 1-Q5R148 036-16100-10 RES 100K 1% 1:P6 1-K4R149 036-15470-10 RES 47K 1% 1:P6 1-L3R152 036-15100-10 RES 10K 1% 1:E4 1-P4R153 036-14390-10 RES 3K9 1% 1:E4 1-Q4R157 036-15100-10 RES 10K 1% 1:R2 1-N3R158 036-13470-00 RES 470 5% 1:R2 1-P3R159 036-14390-10 RES 3K9 1% 1:R2 1-Q2R213 036-14100-10 RES 1K0 1% 1:B3 2-G4R220 036-16100-10 RES 100K 1% 1:G4 2-G7R221 036-16100-10 RES 100K 1% 1:G4 2-G6R224 036-15100-10 RES 10K 1% 1:F4 2-H6R228 036-15100-10 RES 10K 1% 1:B2 2-J8R229 036-14100-10 RES 1K0 1% 1:B3 2-K8R230 036-14150-10 RES 1K5 1% 1:B3 2-K8R233 036-15100-10 RES 10K 1% 1:F4 2-L7



R234 036-15100-10 RES 10K 1% 1:F4 2-L6R235 036-15100-10 RES 10K 1% 1:F4 2-L6R236 036-15100-10 RES 10K 1% 1:F4 2-L6R237 036-15100-10 RES 10K 1% 1:G4 2-M6*R238 036-15220-00 RES 22K 5% 1:G4 2-N7R239 036-15220-00 RES 22K 5% 1:G4 2-M6R243 036-15470-10 RES 47K 1% 1:B4 2-C6R244 036-15470-10 RES 47K 1% 1:B4 2-C6R245 036-15220-00 RES 22K 5% 1:C3 2-C5R246 036-16100-10 RES 100K 1% 1:C3 2-D5R247 036-16100-10 RES 100K 1% 1:C3 2-D6R248 036-16220-00 RES 220K 5% 1:D3 2-E6R249 036-15100-10 RES 10K 1% 1:D4 2-E6R250 036-15100-10 RES 10K 1% 1:B3 2-F5R251 036-15100-10 RES 10K 1% 1:B3 2-G5R252 036-15100-10 RES 10K 1% 1:B3 2-G5R255 036-15470-10 RES 47K 1% 1:A4 2-C4R256 036-15470-10 RES 47K 1% 1:B4 2-C4R257 036-15220-00 RES 22K 5% 1:C4 2-C4R258 036-16100-10 RES 100K 1% 1:C4 2-D4R259 036-16100-10 RES 100K 1% 1:C3 2-D4R260 036-16220-00 RES 220K 5% 1:D3 2-E4R261 036-15100-10 RES 10K 1% 1:D4 2-E4R264 036-17220-00 RES 2M2 5% 1:F4 2-J4R266 036-15100-10 RES 10K 1% 1:B2 2-N5R269 036-15220-00 RES 22K 5% 1:G4 2-M4R270 036-15100-10 RES 10K 1% 1:D4 2-F2R271 036-15270-10 RES 27K 1% 1:D4 2-F2R272 036-15470-10 RES 47K 1% 1:B4 2-C2R273 036-15470-10 RES 47K 1% 1:B4 2-C3R274 036-16100-10 RES 100K 1% 1:C4 2-C2R275 036-16100-10 RES 100K 1% 1:C4 2-D2R276 036-16100-10 RES 100K 1% 1:C4 2-D3R277 036-16220-00 RES 220K 5% 1:D4 2-E3R278 036-15100-10 RES 10K 1% 1:D4 2-F3R279 036-15100-10 RES 10K 1% 1:D4 2-F3R280 036-15100-10 RES 10K 1% 1:D4 2-F0R281 036-15270-10 RES 27K 1% 1:D4 2-F0R283 036-15470-10 RES 47K 1% 1:B4 2-C1R284 036-15470-10 RES 47K 1% 1:B4 2-C1R285 036-16100-10 RES 100K 1% 1:C4 2-C0R286 036-16100-10 RES 100K 1% 1:C4 2-D0R287 036-16100-10 RES 100K 1% 1:C4 2-D1R288 036-16220-00 RES 220K 5% 1:C4 2-E1R289 036-15100-10 RES 10K 1% 1:D4 2-F1R290 036-15100-10 RES 10K 1% 1:D4 2-F1R320 036-14470-10 RES 4K7 1% 1:F5 3-B7R321 036-16220-00 RES 220K 5% 1:F6 3-B7R322 036-16220-00 RES 220K 5% 1:G6 3-C7R323 036-15470-10 RES 47K 1% 1:F6 3-B7



R324 036-16100-10 RES 100K 1% 1:F6 3-B6R325 036-14470-10 RES 4K7 1% 1:F5 3-C6R328 036-14100-10 RES 1K0 1% 1:F5 3-D8R329 036-14100-10 RES 1K0 1% 1:F5 3-D8R330 036-15120-00 RES 12K 5% 1:F5 3-D7R331 036-14100-10 RES 1K0 1% 1:F5 3-D7R332 036-14100-10 RES 1K0 1% 1:F5 3-D6R333 036-14100-10 RES 1K0 1% 1:F5 3-E7R334 036-16180-00 RES 180K 5% 1:G5 3-F8R335 036-14330-10 RES 3K3 1% 1:E4 3-F8R336 036-14330-10 RES 3K3 1% 1:E4 3-G8R337 036-14330-10 RES 3K3 1% 1:G5 3-G8R341 036-15220-00 RES 22K 5% 1:E2 3-K9R342 036-15100-10 RES 10K 1% 1:E2 3-K9R343 036-14470-10 RES 4K7 1% 1:E2 3-L8R344 036-14150-10 RES 1K5 1% 1:E2 3-L8R347 036-15470-10 RES 47K 1% 1:E2 3-K7R348 036-15470-10 RES 47K 1% 1:E2 3-K7R349 036-14470-10 RES 4K7 1% 1:E2 3-L6R350 036-14150-10 RES 1K5 1% 1:E2 3-L6R354 036-14470-10 RES 4K7 1% 1:F5 3-B5R355 036-16220-00 RES 220K 5% 1:G6 3-B5R356 036-15470-10 RES 47K 1% 1:F6 3-B4R357 036-16100-10 RES 100K 1% 1:G6 3-B4R358 036-16220-00 RES 220K 5% 1:G5 3-C5R359 036-14470-10 RES 4K7 1% 1:G6 3-C4R363 036-14100-10 RES 1K0 1% 1:F5 3-D5R364 036-14100-10 RES 1K0 1% 1:F5 3-D5R365 036-14100-10 RES 1K0 1% 1:G5 3-E6R366 036-16180-00 RES 180K 5% 1:G5 3-F5R367 036-16180-00 RES 180K 5% 1:G5 3-F5R368 036-14100-10 RES 1K0 1% 1:F6 3-E4R371 036-14150-10 RES 1K5 1% 1:G5 3-D4R372 036-14560-00 RES 5K6 5% 1:G5 3-D3R373 036-14100-10 RES 1K0 1% 1:G5 3-E3R374 036-16180-00 RES 180K 5% 1:G5 3-F3R378 036-15220-00 RES 22K 5% 1:L2 3-K5R379 036-15100-10 RES 10K 1% 1:L2 3-K5R380 036-14470-10 RES 4K7 1% 1:L2 3-L5R381 036-14150-10 RES 1K5 1% 1:M2 3-L5R384 036-15470-10 RES 47K 1% 1:L2 3-K3R385 036-15470-10 RES 47K 1% 1:L2 3-K4R386 036-14470-10 RES 4K7 1% 1:L2 3-L3R387 036-14150-10 RES 1K5 1% 1:L2 3-L3R420 036-14100-10 RES 1K0 1% 1:J4 4-B7R421 036-14100-10 RES 1K0 1% 1:K4 4-C7R422 036-14150-10 RES 1K5 1% 1:D2 4-E7R423 036-15100-10 RES 10K 1% 1:D2 4-D7R424 036-14150-10 RES 1K5 1% 1:C2 4-E6R425 036-15100-10 RES 10K 1% 1:D2 4-D5



R428 036-14150-10 RES 1K5 1% 1:F2 4-G8

R429 036-14100-10 RES 1K0 1% 1:F2 4-G8R430 036-15100-10 RES 10K 1% 1:J4 4-F7R431 036-14470-10 RES 4K7 1% 1:J4 4-G7R432 036-14470-10 RES 4K7 1% 1:K4 4-H8R433 036-14100-10 RES 1K0 1% 1:H3 4-J9R437 036-14150-10 RES 1K5 1% 1:F2 4-H7R438 036-14100-10 RES 1K0 1% 1:F2 4-J7R439 036-15100-10 RES 10K 1% 1:J4 4-H6R450 036-14470-10 RES 4K7 1% 1:J4 4-J6R451 036-14150-10 RES 1K5 1% 1:H2 4-K7R452 036-14100-10 RES 1K0 1% 1:H2 4-L7R453 036-15100-10 RES 10K 1% 1:J4 4-K6R454 036-14470-10 RES 4K7 1% 1:J4 4-K6R458 036-14150-10 RES 1K5 1% 1:G2 4-M6R459 036-14100-10 RES 1K0 1% 1:G2 4-M6R460 036-15100-10 RES 10K 1% 1:J3 4-L5R461 036-14470-10 RES 4K7 1% 1:J3 4-M5R462 036-14150-10 RES 1K5 1% 1:G2 4-P5R463 036-14100-10 RES 1K0 1% 1:G2 4-P5R464 036-15100-10 RES 10K 1% 1:J3 4-N5R465 036-14470-10 RES 4K7 1% 1:J3 4-P5R469 036-14100-10 RES 1K0 1% 1:N3 4-B2R470 036-14100-10 RES 1K0 1% 1:N4 4-C2R471 036-14150-10 RES 1K5 1% 1:K2 4-E2R472 036-15100-10 RES 10K 1% 1:K2 4-D2R473 036-14150-10 RES 1K5 1% 1:K2 4-E1R474 036-15100-10 RES 10K 1% 1:K2 4-D0R478 036-14150-10 RES 1K5 1% 1:M2 4-G3R479 036-14100-10 RES 1K0 1% 1:M2 4-G3R480 036-15100-10 RES 10K 1% 1:N4 4-F2R481 036-14470-10 RES 4K7 1% 1:M4 4-G2R482 036-14470-10 RES 4K7 1% 1:N4 4-H3R483 036-14100-10 RES 1K0 1% 1:L3 4-J4R484 036-14150-10 RES 1K5 1% 1:N2 4-H2R485 036-14100-10 RES 1K0 1% 1:N2 4-J2R486 036-15100-10 RES 10K 1% 1:M4 4-H2R487 036-14470-10 RES 4K7 1% 1:M4 4-J2R490 036-14150-10 RES 1K5 1% 1:P2 4-K2R491 036-14100-10 RES 1K0 1% 1:P2 4-L2R492 036-15100-10 RES 10K 1% 1:M4 4-K1R493 036-14470-10 RES 4K7 1% 1:M4 4-K1R494 036-14150-10 RES 1K5 1% 1:P2 4-M1R495 036-14100-10 RES 1K0 1% 1:P2 4-M1R496 036-15100-10 RES 10K 1% 1:M3 4-L1R497 036-14470-10 RES 4K7 1% 1:M3 4-M1R498 036-14150-10 RES 1K5 1% 1:N2 4-P1R499 036-14100-10 RES 1K0 1% 1:N2 4-P1R500 036-15100-10 RES 10K 1% 1:M3 4-N0



R501 036-14470-10 RES 4K7 1% 1:M3 4-P0RL400 237-10010-00 RLY DPDT 1-2A/12V DIL 10PIN SMD AS-12W-K-B05 1:K3 4-K0RL401 237-10010-00 RLY DPDT 1-2A/12V DIL 10PIN SMD AS-12W-K-B05 1:N3 4-K4RV300 042-04500-05 TRIM POT 5K +/-25% 5MM SQUARE SMD CERMET 1:F6 3-B7RV301 042-04500-05 TRIM POT 5K +/-25% 5MM SQUARE SMD CERMET 1:G5 3-B5SW100 230-10010-44 SW X 8 SPST 1:D6 1-F0SW201 230-10010-44 SW X 8 SPST 1:B3 2-F0SW400 230-10010-44 SW X 8 SPST 1:H3 4-M6SW401 230-10010-44 SW X 8 SPST 1:M3 4-J2 X200 274-10004-00 CRYSTAL 4.032MHZ +-10PPM 1:F4 2-J4



6.3 Non-SMD Parts List (227-70301-07)

Ref IPN DescriptionD115 008-00014-74 LED HLMP5030 RED MTG IN A RIGHT ANGLE HOLDER 5MMD306 008-00014-73 LED HLMP5050 GREEN MTG IN A RT ANGLE HOLDER 5MMD308 008-00014-73 LED HLMP5050 GREEN MTG IN A RT ANGLE HOLDER 5MMD312 008-00014-73 LED HLMP5050 GREEN MTG IN A RT ANGLE HOLDER 5MMD314 008-00014-73 LED HLMP5050 GREEN MTG IN A RT ANGLE HOLDER 5MMD401 008-00014-74 LED HLMP5030 RED MTG IN A RIGHT ANGLE HOLDER 5MMD402 008-00014-74 LED HLMP5030 RED MTG IN A RIGHT ANGLE HOLDER 5MMD403 008-00014-74 LED HLMP5030 RED MTG IN A RIGHT ANGLE HOLDER 5MMD404 008-00014-74 LED HLMP5030 RED MTG IN A RIGHT ANGLE HOLDER 5MMD405 008-00014-74 LED HLMP5030 RED MTG IN A RIGHT ANGLE HOLDER 5MMD408 008-00014-75 LED HLMP5040 YELLOW 5mm RT ANGLE PCB MTGD409 008-00014-75 LED HLMP5040 YELLOW 5mm RT ANGLE PCB MTGD410 008-00014-75 LED HLMP5040 YELLOW 5mm RT ANGLE PCB MTGD411 008-00014-75 LED HLMP5040 YELLOW 5mm RT ANGLE PCB MTGD415 008-00014-74 LED HLMP5030 RED MTG IN A RIGHT ANGLE HOLDER 5MMD416 008-00014-74 LED HLMP5030 RED MTG IN A RIGHT ANGLE HOLDER 5MMD417 008-00014-74 LED HLMP5030 RED MTG IN A RIGHT ANGLE HOLDER 5MMD418 008-00014-74 LED HLMP5030 RED MTG IN A RIGHT ANGLE HOLDER 5MMD419 008-00014-74 LED HLMP5030 RED MTG IN A RIGHT ANGLE HOLDER 5MMIC1 002-20068-07 IC MC68HC705C8FN 1-TIME PROG MICRO (MECH PART)*IC112 005-01205-00 MODULE PP101205 DC-DC CONVERTER 12-5V 2A 10WP100 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONP101 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONP102 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONP103 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONP105 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONP106 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONP107 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONP108 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONP200 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONP202 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONP203 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONP204 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONP205 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONP208 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONP209 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONP210 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONP211 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONP213 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONP220 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONP221 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONPL1 240-00010-53 PLUG 15WAY RIGHT ANGLE SIDE ENTRY DRANGEPL2 240-00010-53 PLUG 15WAY RIGHT ANGLE SIDE ENTRY DRANGEPL3 240-00010-53 PLUG 15WAY RIGHT ANGLE SIDE ENTRY DRANGEPL4 240-00010-53 PLUG 15WAY RIGHT ANGLE SIDE ENTRY DRANGERL100 237-00010-37 RELAY TQ2L2 4V5 SPDT 2 COIL LATCHING 200MW PTHRL101 237-00010-37 RELAY TQ2L2 4V5 SPDT 2 COIL LATCHING 200MW PTH


RL102 237-00010-37 RELAY TQ2L2 4V5 SPDT 2 COIL LATCHING 200MW PTHRL103 237-00010-37 RELAY TQ2L2 4V5 SPDT 2 COIL LATCHING 200MW PTHRV100 044-05100-01 POT 10K LIN 15 TURNS COPAL CT-20P SIDE ADJUSTRV101 044-05100-01 POT 10K LIN 15 TURNS COPAL CT-20P SIDE ADJUSTRV102 044-05100-01 POT 10K LIN 15 TURNS COPAL CT-20P SIDE ADJUSTRV203 044-05100-01 POT 10K LIN 15 TURNS COPAL CT-20P SIDE ADJUSTRV204 044-05100-01 POT 10K LIN 15 TURNS COPAL CT-20P SIDE ADJUSTRV205 044-05100-01 POT 10K LIN 15 TURNS COPAL CT-20P SIDE ADJUSTRV206 044-05100-01 POT 10K LIN 15 TURNS COPAL CT-20P SIDE ADJUSTSK1 240-02010-59 SOCKET 25WAY RIGHT ANGLE SIDE ENTRY DRANGESW200 232-00010-26 SWITCH SPDT PUSH MOMENTARY RIGHT ANGLESW202 230-00010-30 SWITCH SPDT TOGGLE RT ANGLE PCB MTGTP300 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONTP301 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONTP302 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONTP305 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONTP310 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTIONTP311 I/O-PAD PAD HOLE FOR OFF BOARD WIRE CONNECTION

Ref IPN Description


6.4 PCB Layout (227-70301-07) - top side

LM

JK

HF

GE

DC

BA

NP

QR

1234567

*C16

0*C

161

*C16

2

*C16

3*C

164

*C16

5

*IC

112

*R23

8

C100

C101

C102C

105

C10

5A

C105B

C10

6

C10

6A

C106B

C110

C114

C118

C12

0

C12

1

C122

C123

C12

6C

127

C12

8

C13

1

C200

C20

1

C203

C220C221

C224

C228

C22

9

C232

C23

3

C237 C238

C24

3

C24

4

C24

5

C24

6

C24

9

C253

C25

4

C257

C25

8

C320

C321

C322

C32

7C

328

C331

C332

C333

C33

5

C33

8

C33

9

C40

0

C40

1

C42

0

C421 C422 C423 C424 C425

C429

C430

C431

C432

C433

C43

6

C437C438 C439 C440 C441

C445

C446

C447

C448

C449

D10

0

D10

1

D10

2

D10

3

D10

7D

108

D10

9

D11

0

D11

2

D11

5

D20

2

D205

D21

0

D211

D300

D301

D30

2

D305

D30

6

D307

D30

8

D311

D31

2

D313

D31

4

D40

0

D40

1D

402

D40

3D

404

D40

5D

408

D40

9D

410

D41

1

D41

4

D41

5D

416

D41

7D

418

D41

9

FID

A

FID

B

IC10

0

IC10

1

IC10

2

IC10

5

IC10

6

IC10

9IC

110

IC11

1

IC20

0

IC201

IC20

2

IC20

3

IC20

4

IC20

7

IC300

IC30

1

IC40

0IC

401

P10

0P

101

P10

2P

103

P10

5P

106

P10

7P

108

P20

0

P20

2

P20

3

P20

4

P20

5

P20

8

P20

9

P21

0

P21

1

P21

3

P22

0

P22

1

PL1

PL2

PL3

PL4

Q100 Q101

Q10

2Q

103

Q106

Q10

7

Q20

0Q

201

Q20

2

Q30

0

Q30

1

Q30

2Q

303

Q30

7Q

308

Q30

9Q

310

Q40

0Q

401

Q40

4

Q40

5

Q40

6

Q40

7

Q40

8

Q40

9

Q410

Q41

1

Q412

Q41

3

Q41

4

Q41

8Q

419

Q42

2

Q42

3

Q42

4

Q42

5

Q426

Q42

7

Q428

Q42

9

Q430

Q43

1

Q43

2

R105

R106

R12

0

R12

1

R127

R128

R135

R136

R137 R138

R139R140

R14

1

R142 R143

R146R147

R148

R14

9

R152

R153

R157

R158

R159

R21

3

R220R221

R22

4

R22

8

R22

9

R23

0

R23

3

R23

4

R23

5

R23

6R

237

R23

9

R243

R244

R24

5

R246

R24

7

R248R249

R25

0

R25

1

R252

R255

R256

R257

R258 R259

R260R261

R264

R26

6

R26

9

R270

R271

R272

R273

R274

R275

R276

R277R278R279

R280

R281

R283

R284

R285

R286

R287

R288

R289

R290

R320

R321

R322

R323

R324

R325

R328

R329

R330

R331

R332

R333

R334

R335

R336

R33

7

R34

1

R34

2

R343

R344

R34

7

R34

8

R349

R350

R354

R35

5

R356

R357

R358

R35

9

R36

3R

364

R365

R36

6

R36

7

R368

R371

R372

R37

3

R37

4

R37

8

R37

9

R380

R381

R38

4

R38

5

R386

R387

R42

0

R42

1

R422

R423

R424

R425

R428R429

R430

R431

R43

2

R433

R437R438

R439

R450

R451R452

R453

R454

R458R459

R460

R461

R462R463

R464

R465

R46

9

R47

0

R471

R472

R473

R474

R478R479

R480

R481

R48

2

R483

R484R485

R486

R487

R490R491

R492

R493

R494R495

R496

R497

R498R499

R500

R501

RL1

00

RL1

01

RL1

02

RL1

03

RL4

00R

L401

RV100

RV101

RV102

RV203

RV204

RV205

RV206

RV

300

RV

301

SK

1

SW

100

SW

200

SW

201 SW

202

SW

400

SW

401

THO

LE

TP30

0

TP30

1TP

302

TP30

5

TP31

0TP

311

TSLO

T

X20

0


6.5 PCB Layout (227-70301-07) - bottom side

LJ

KG

HF

DE

CB

AM

NP

QR

1234567B

HO

LE


6.6 Circuit Diagram (227-70301-07) - page 1 of 2

0123456789

0123456789

AB

CD

EF

GH

JK

LM

NP

QR

RE

V/IS

SA

ME

ND

ME

NT

SD

AT

EA

PV

DD

.O.

CH

KD

DR

AW

NN

O.S

HE

ET

S:

FIL

EN

AM

E:

TA

ITE

LE

CT

RO

NIC

S

IPN

:

FIL

ED

AT

E:

ISS

UE

:ID

:.

2.S

C.

PR

OJE

CT:

DE

SIG

NE

R:

1

4

TA

703-0

1T

800

CH

AN

GE

-OV

ER

MO

DU

LE

a070317b

227-7

0301-0

7

14-J

ul-

05

B

TA

703-0

1H

.OV

ER

TO

OM

P1

PR

OT

OT

YP

EM

.HA

LL

H.O

.M

.HA

LL

S.C

RA

GG

17/0

5/9

6

1A

PC

BU

PD

AT

EM

.HA

LL

H.O

.M

.HA

LL

S.C

RA

GG

07/0

6/9

6

2A

CH

AN

GE

NO

TE

TA

703-0

1:1

2/9

6:0

001

M.H

AL

LH

.O.

M.H

AL

LS

.CR

AG

G17/1

2/9

6

3A

MIG

RA

TE

DT

OU

NIC

AD

M.H

AL

LH

.O.

M.H

AL

LS

.CR

AG

G20/0

3/9

7

4A

EC

O770176.

TM

BH

.O.

M.H

AL

LJA

CK

SO

N09/0

9/9

9

5A

EC

O770212.

M.H

AL

L

6A

EC

O770128

MA

JO

RC

HA

NG

ES

AD

AM

.DH

.OM

.HA

LL

JA

CK

SO

N06/0

4/0

0

06B

EC

O720611

TB

H.O

.M

.HA

LL

07A

EC

O101400260

M.H

AL

LH

.O.

M.H

AL

LC

.LE

WIS

04F

EB

05

07B

EC

O101400323

-D

11

0R

OTA

TE

M.H

AL

LH

.O.

M.H

AL

LC

.LE

WIS

14JU

L05

PL

315

WA

YR

-AN

GL

ED

RA

NG

EP

LU

GP

L1

15

WA

YR

-AN

GL

ED

RA

NG

EP

LU

GP

L2

15

WA

YR

-AN

GL

ED

RA

NG

EP

LU

GS

K1

25

WA

YR

-AN

GL

ED

RA

NG

ES

OC

KE

T

R135

47K

R137

47K

R138

47K

R136

47K

R140

47K

R141

47K

R127

100K

R128

100K

C122

10N

C123

10N

*IC

11

2P

P101205

VIN

+4

VIN

-1

VO

UT

+3

VO

UT-

2

P106

I/O

PA

D

P105

I/O

PA

D

*C161

100U

*C162

1U

0*C

165

1U

0*C

164

100U

*C163

470U

*C160

220U

FID

AF

IDU

CIA

LF

IDB

FID

UC

IAL

IC101

4001B

T V-

7

V+

14

IC101

4001B

T12

13

11

IC101

4001B

T8 9

10

IC101

4001B

T5 6

4

IC101

4001B

T1 2

3

IC100

4001B

T V-

7

V+

14

D SG

Q102

ZV

N3306A

D SG

Q103

ZV

N3306A

D107

MR

A4004 P103

I/O

PA

D

P102

I/O

PA

D

C126

100P

SW

100

8B

AN

KD

IPS

W

6

11

SW1008BANKDIPSW

2

15

SW1008BANKDIPSW

1

16

R120

100K

R121

100K

C120

10N

C121

10N

IC100

4001B

T1 2

3

IC100

4001B

T5 6

4

IC100

4001B

T12

13

11

D SG

Q100

ZV

N3306A

D SG

Q101

ZV

N3306A

R139

100K

C128

1N

0

C127

1N

0

IC102

TL

C2272

V-

4

V+

8+ -IC

102

TL

C2272

5 6

7

+ -IC102

TL

C2272

3 2

1

C100

100N

C101

100N

C102

100N

SW

100

8B

AN

KD

IPS

W

3

14

SW

100

8B

AN

KD

IPS

W

413

SW

100

8B

AN

KD

IPS

W

512

TS

LO

TS

LO

TT

HO

LE

HO

LE

LV

I

IC109

MC

34064D IN

2

GN

D

4

RE

S1

LV

I

IC110

MC

34064D IN

2

GN

D

4

RE

S1

CW

RV

100

10K

15T

13

2 CW

RV

101

10K

15T

13

2

R147

3K

9

R153

3K

9

R146

10K

R152

10K

D109

MR

A4004

D112

MR

A4004

C11

01N

0

C11

41N

0

GR

OU

ND

VIN

VO

UT

IC106

78L

05

8

23

67

1

GR

OU

ND

VIN

VO

UT

IC105

78L

08

8

23

67

1

C106

100U

C106A

10U

C106B

100N

R106

2K

2

C105

100U

C105A

10U

C105B

100N

R105

4K

7

R142

10K

R143

10K

C131

10U

D101

MR

A4004

D100

MR

A4004

D102

MR

A4004

D103

MR

A4004

D108

MR

A4004

R149

47K

R148

100K

D SG

Q107

ZV

N3306A

Q106

BC

857

P101

I/O

PA

D

RL

100

TQ

2L

22 4

3

RL

100

TQ

2L

29 7

8

RL

101

TQ

2L

22 4

3

RL

101

TQ

2L

29 7

8

RL

103

TQ

2L

2

9 7

8

RL

103

TQ

2L

22 4

3

RL

102

TQ

2L

29 7

8

RL

102

TQ

2L

22 4

3

-+

SE

T

RL

100

TQ

2L

26

10

-+

SE

T

RL

102

TQ

2L

26

10

-+

SE

T

RL

101

TQ

2L

26

10

-+

SE

T

RL

103

TQ

2L

26

10

-+R

L100

TQ

2L

251

-+R

L102

TQ

2L

251

-+R

L103

TQ

2L

251

-+R

L101

TQ

2L

251

LV

I

IC111

MC

34064D IN

2

GN

D

4

RE

S1

CW

RV

102

10K

15T

13

2

R159

3K

9

R157

10K

C11

81N

0

D11

5R

ED

21

R158

470

P100

I/O

PA

D P108

I/O

PA

DP

107

I/O

PA

D

D11

0M

RA

4004

SK

1+

5V

-OU

T12

SK

1+

5V

-OU

T13

SK

1+

5V

-OU

T24

SK

1+

5V

-OU

T25

SK

11

SK

17

SK

19

SK

1

10

+13V

8

PL

1R

XA

UD

A+

1 PL

1R

XA

UD

A-

2PL

2R

XA

UD

B+

1 PL

2R

XA

UD

B-

2 PL

1T

XA

UD

A+

3 PL

1T

XA

UD

A-

4PL

2T

XA

UD

B+

3 PL

2T

XA

UD

B-

4

PL

3R

EM

OT

ER

XL

INE

+1

PL

3R

EM

OT

ER

XL

INE

-2

SK

1

14

SK

1

15

SK

1

16

SK

1

17

PL

3R

EM

OT

ET

XL

INE

-4

PL

3R

EM

OT

ET

XL

INE

+3

+5V

+5V

+5V

+5V

+5V

+5V

+5V

+5V

+13V

8

PL

1T

X_K

EY

_A

7 PL

2T

X_K

EY

_B

7

PL

3R

EM

OT

ET

XK

EY

7

SK

1

19

PL

1R

X_G

AT

E_A

5 PL

2R

X_G

AT

E_B

5

PL

3R

XG

AT

EO

/P5

SK

1

18

RS

SI-

B3A

5

RS

SI-

A3A

7

SK

1R

SS

I_O

/P21

PL

3R

SS

IA

CT

IVE

11

DIR

_P

C0

2L

4

DIR

_P

C2

2L

5

CN

TR

L_P

C1

2L

4

+5V

+5V

+8V

PL

1P

SU

-A13

PL

2P

SU

-B13

+5V

+5V

+13V

8

+13V

8

+13V

8+

5V

+13V

8+

8V

+8V

+8V

+13V

8

RX

_G

AT

E_A

3H

9

RX

_G

AT

E_B

3H

5

TX

_K

EY

_A

3H

7

TX

_K

EY

_B

3H

3

PA

62H

6

PA

22H

5

PL

3V

+B

AT

T8

+5V

BA

TT

_L

OW

2L

5

+5V

PL

2T

X_K

EY

_B

10

PL

1T

X_K

EY

_A

10

+13V

8

PL

3

15

DC

/DC

CO

NV

ER

TE

R

OP

TIO

NA

L+

13V

8

+13V

8

CO

AX

IAL

RE

LA

Y

*N

OT

NO

RM

AL

LY

PL

AC

ED

DC

_P

WR

_C

OM

PA

RA

TO

RS

RX

/TX

C/O

RE

LA

Y

SE

LE

CT

BA

SE

PO

WE

R_R

EG

UL

AT

OR

S

SW

100

3-1

4

6-1

1

X

4-1

3

1-1

6

X

2-1

5

5-1

27-1

0

TT

TT

8-9

BS

BS

BS

TT

ON

OF

FL

OC

AT

ION

1F

0

1K

4

1F

0

1F

61

F6

1F

03

J3

3J7

RE

LA

YC

ON

TA

CT

SD

RA

WN

INR

ES

ET

STA

TE

+ -

+ -



0123456789

0123456789

AB

CD

EF

GH

JK

LM

NP

QR

RE

V/I

SS

AM

EN

DM

EN

TS

DA

TE

AP

VD

D.O

.C

HK

DD

RA

WN

NO

.SH

EE

TS

:F

ILE

NA

ME

:

TA

ITE

LE

CT

RO

NIC

S

IPN

:

FIL

ED

AT

E:

ISS

UE

:ID

:.

2.S

C.

PR

OJ

EC

T:

DE

SIG

NE

R:

2

4

TA

70

3-0

1T

80

0C

HA

NG

E-O

VE

RM

OD

UL

E

a070317b

227-7

0301-0

7

14-J

ul-

05

B

TA

703-0

1H

.OV

ER

TO

OM

P1

PR

OT

OT

YP

EM

.HA

LL

H.O

.M

.HA

LL

S.C

RA

GG

17/0

5/9

6

1A

PC

BU

PD

AT

EM

.HA

LL

H.O

.M

.HA

LL

S.C

RA

GG

07/0

6/9

6

2A

CH

AN

GE

NO

TE

TA

703-0

1:1

2/9

6:0

001

M.H

AL

LH

.O.

M.H

AL

LS

.CR

AG

G17/1

2/9

6

3A

MIG

RA

TE

DT

OU

NIC

AD

M.H

AL

LH

.O.

M.H

AL

LS

.CR

AG

G20/0

3/9

7

4A

EC

O770176.

TM

BH

.O.

M.H

AL

LJA

CK

SO

N09/0

9/9

9

5A

EC

O770212.

M.H

AL

L

6A

EC

O770128

MA

JO

RC

HA

NG

ES

AD

AM

.DH

.OM

.HA

LL

JA

CK

SO

N06/0

4/0

0

06B

EC

O720611

TB

H.O

.M

.HA

LL

07A

EC

O101400260

M.H

AL

LH

.O.

M.H

AL

LC

.LE

WIS

04F

EB

05

07B

EC

O101400323

-D

110

RO

TA

TE

M.H

AL

LH

.O.

M.H

AL

LC

.LE

WIS

14JU

L05

IC200

68H

C705C

8F

N

IRQ

2

TC

AP

41

PA

75

PA

66

PA

57

PA

48

PA

39

PA

210

PA

111

PA

012

PB

721

PB

620

PB

519

PB

417

PB

316

PB

215

PB

114

PB

013

OS

C1

43

OS

C2

42

GN

D

22

RE

SE

T

1

VP

P

4

VC

C

44

NC

3

NC

18

NC

23

NC

40

PD

739

TC

MP

38

SS

/PD

537

SC

K/P

D4

36

MO

SI/P

D3

35

MIS

O/P

D2

34

TD

O/P

D1

33

RD

I/P

D0

32

PC

724

PC

625

PC

526

PC

427

PC

328

PC

229

PC

130

PC

031

+ -IC202

339D

9 8

14

CW

RV

203

10K

15T

13

2

C229

10U

R249

10K

+ -IC202

339D

7 6

1

CW

RV

205

10K

15T

13

2

C254

10U

R278

10K

+ -IC202

339D

11

10

13

CW

RV

204

10K

15T

13

2

C233

10U

R261

10K

+ -IC202

339D

5 4

2

CW

RV

206

10K

15T

13

2

C258

10U

R289

10K

X200

4.0

32M

C237

22P

C238

22P

LV

I

IC204

MC

34064D IN

2

GN

D

4

RE

S1

R228

10K

R266

10K

R236

10K

C228

4N

7

C253

4N

7

C232

4N

7

C257

4N

7

R248

220K

R277

220K

R260

220K

R288

220K

R224

10K

C200

100N

R250

10K

R251

10K

R252

10K

R233

10K

R234

10K

R235

10K

R237

10K

P200

RE

V-P

WR

-B

I/O

PA

DR

243

47K

P208

FW

D-P

WR

-B

I/O

PA

D

P209

GN

D

I/O

PA

D

R272

47K

P203

RE

V-P

WR

-A

I/O

PA

D

P204

GN

D

I/O

PA

D

P211

FW

D-P

WR

-A

I/O

PA

D

SW

200

SP

DT

3

21

SW

202

SP

DT

1

23

R229

1K

0

R230

1K

5

R264

2M

2

SW

201

8B

AN

KD

IPS

W

5

12 S

W201

8B

AN

KD

IPS

W

89

SW

201

8B

AN

KD

IPS

W

314

SW

201

8B

AN

KD

IPS

W

215

SW

201

8B

AN

KD

IPS

W

116

R269

22K

P220

I/O

PA

D

P221

I/O

PA

D

Q201

BC

817

R279

10K

R290

10K

Q202

BC

817

SW

201

8B

AN

KD

IPS

W

710

SW

201

8B

AN

KD

IPS

W

611

D202

BA

V99

23

D202

BA

V993

1

D205

BA

V99

23

D205

BA

V99

3 1

P202

I/O

PA

D

P210

I/O

PA

D

P205

I/O

PA

D

P213

I/O

PA

D

+ -IC201

LM

324D

12

13

14

+ -IC201

LM

324D

5 6

7

IC201

LM

324D

V-

11

V+

4

R283

47K

R284

47K

R285

100K

R286

100K

R287

22K

R255

47K

R256

47K

R257

22K

R259

22K

R258

100K

+ -IC201

LM

324D

3 2

1R

276

22K

R275

100K

R274

100K

R273

47K

R244

47K

+ -IC201

LM

324D

10 9

8

R245

22K

R247

22K

R246

100K

IC203

74H

C86T

5 46

IC203

74H

C86T

12

13

11

IC203

74H

C86T

1 23

IC203

74H

C86T

9

10

8

C224

1N

0

C249

1N

0

C201

100N

R239

22K

*R238

22K Q200

BC

817

IC202

339D V

-12

V+

3

IC203

74H

C86T

V-

7

V+

14

C203

100N

SW

201

8B

AN

KD

IPS

W

413

C220

100N

C221

100N

R220

100K

R221

100K

IC100

4001B

T

8 91

0

IC207

MA

X232

C1+

1

C1-

3

C2+

4

C2-

5

T2IN

10

T1IN

11

R1O

UT

12

R2O

UT

9

GN

D

15+

V

16

5/1

0V

+2

5/1

0V

-6

T2O

UT

7

T1O

UT

14

R1IN

13

R2IN

8

C246

10U

C245

10U

C243

10U

C244

10U

R213

1K

0

D210

BA

V99

31

D211

BA

V99

31

D210

BA

V99

23

D211

BA

V99

23

R271

27K

R281

27K

R270

10K

R280

10K

+5

V+

5V

PL

2F

WD

-PW

R-B

11

PL

2R

EV

-PW

R-B

12

PL

1R

EV

-PW

R-A

12

PL

1F

WD

-PW

R-A

11

+8

V

+5

V

+8

V

+5

V

+8

V

+5

V

+8

V

+5

V

+1

3V

8+

5V

PA

03L

8

PA

13L

7

PA

33G

7

PA

43L

5

PA

53L

3

MO

SI

4B

8

SC

K4B

8

LE

4B

8

+5

V

+5

V

+5

V

+5

V+

5V

+5

V

+5

V

+5

V+

5V

+5

V

PA

73G

6

PB

73G

4

+5

V

PL

3T

XS

EL

EC

T14

PL

3R

MT

_A

LM

_C

LR

12

+8

V

+5

V

+5

V

PL

1R

EV

-AL

MA

8

PL

2R

EV

AL

MB

8

PL

2F

WD

AL

MB

6

+5

V

PL

1F

WD

-AL

MA

6

+8

V

DIR

_P

C2

1B

4

DIR

_P

C0

1B

5

CN

TR

L_

PC

11B

6

+8

V

PL

3R

SS

IA

LA

RM

13

SK

1

23

+8

V+

5V

PA

61N

5

PA

21N

4

BA

TT

_L

OW

1N

2

SK

1R

XD

3

SK

1T

XD

2

+5

V+

5V

RF

PW

RC

OM

PA

RA

TO

RS

RE

SE

T

BA

SE

SE

LE

CT

SW

20

1S

ET

TIN

GS

SW

1S

W2

ON

ON

OF

FO

FF

OF

FO

FF

MO

DE

AM

OD

EB

1-1

62

-15

3-1

44

-13

NO

TU

SE

D

SW

2S

W1

5-1

2L

INK

RE

VP

WR

A-B

DIS

AB

LE

FW

DA

LM

B6

-11

7-1

0D

ISA

BL

EF

WD

AL

MA

8-9

LIN

KF

WD

PW

RA

-B2

-F0

2F

22

B5

2H

02

F4

2F

52

F5

2-B

2

LO

CA

TIO

NM

OD

EC

NO

TU

SE

D

For

Low

Pow

er

Lin

ks

(e.g.2

watt

links)

usin

gTele

wave

pow

er

monitors

,it

isnecessary

tom

ake

som

ecom

ponentchanges

tochange

the

gain

and

hyste

resis

ofth

eTA

703

pow

er

levelm

onitoring

circuitry

.

1.C

hange

the

0805

chip

resis

tors

R247,R

259,R

276

and

R287

from

100K

to22K

(IP

N036-1

5220-0

0).

2.C

hange

the

0805

chip

resis

tors

R245,R

257,R

274,and

R285

from

22K

to10K

(IP

N036-1

5100-0

0).

Lo

wP

ow

er

Lin

ks

ON

ON

MO

DE

D



0123456789

0123456789

AB

CD

EF

GH

JK

LM

RE

V/IS

SA

ME

ND

ME

NT

SD

AT

EA

PV

DD

.O.

CH

KD

DR

AW

NN

O.S

HE

ET

S:

FIL

EN

AM

E:

TA

ITE

LE

CT

RO

NIC

S

IPN

:

FIL

ED

AT

E:

ISS

UE

:ID

:.

2.S

C.

PR

OJ

EC

T:

DE

SIG

NE

R:

3

4

TA

70

3-0

1T

80

0C

HA

NG

E-O

VE

RM

OD

UL

E

a0

70

31

7b

22

7-7

03

01

-07

14

-Ju

l-0

5

B

TA

70

3-0

1H

.OV

ER

TO

OM

P1

PR

OT

OT

YP

EM

.HA

LL

H.O

.M

.HA

LL

S.C

RA

GG

17

/05

/96

1A

PC

BU

PD

AT

EM

.HA

LL

H.O

.M

.HA

LL

S.C

RA

GG

07

/06

/96

2A

CH

AN

GE

NO

TE

TA

70

3-0

1:1

2/9

6:0

00

1M

.HA

LL

H.O

.M

.HA

LL

S.C

RA

GG

17

/12

/96

3A

MIG

RA

TE

DT

OU

NIC

AD

M.H

AL

LH

.O.

M.H

AL

LS

.CR

AG

G2

0/0

3/9

7

4A

EC

O7

70

17

6.

TM

BH

.O.

M.H

AL

LJ

AC

KS

ON

09

/09

/99

5A

EC

O7

70

21

2.

M.H

AL

L

6A

EC

O7

70

12

8M

AJ

OR

CH

AN

GE

SA

DA

M.D

H.O

M.H

AL

LJ

AC

KS

ON

06

/04

/00

06

BE

CO

72

06

11

TB

H.O

.M

.HA

LL

07

AE

CO

10

14

00

26

0M

.HA

LL

H.O

.M

.HA

LL

C.L

EW

IS0

4F

EB

05

07

BE

CO

10

14

00

32

3-

D110

RO

TA

TE

M.H

AL

LH

.O.

M.H

AL

LC

.LE

WIS

14

JU

L0

5

+- IC3

00

LM

32

4D

32

1

+- IC3

00

LM

32

4D

56

7

+ -IC3

01

33

9D

5 4

2

+- IC3

01

33

9D

76

1

IC3

00

LM

32

4D

V-

11

V+

4

R3

22

22

0K

R3

58

22

0K

C3

22

10

0P

C3

33

10

0P

R3

21

22

0K

CW

RV

30

0 5K

13

2

R3

23

47

K

C3

21

47

N

R3

25

4K

7

R3

59

4K

7C

33

24

7N

R3

55

22

0K

CW

RV

30

1 5K

13

2

R3

20

4K

7

R3

54

4K

7

R3

56

47

K

R3

63

1K

0

Q3

03

BC

81

7Q

30

2B

C8

17

R3

64

1K

0

R3

32

1K

0

R3

31

1K

0R

33

01

2K

Q3

00

BC

85

7Q

30

1B

C8

57

R3

65

1K

0

R3

66

18

0K

R3

33

1K

0

R3

34

18

0K

R3

29

1K

0R

32

81

K0

R3

35

3K

3

+ -IC3

01

33

9D

11

10

13

+ -IC3

01

33

9D

9 8

14

R3

41

22

K

R3

42

10

K

Q3

07

BC

85

7

D3

06

GR

EE

N21

R3

43

4K

7R

34

41

K5

R3

47

47

K

R3

48

47

K

Q3

08

BC

85

7

D3

08

GR

EE

N21

R3

49

4K

7R

35

01

K5

R3

78

22

K

R3

79

10

K

Q3

09

BC

85

7

D3

12

GR

EE

N21

R3

80

4K

7R

38

11

K5

R3

84

47

K

R3

85

47

K

Q3

10

BC

85

7

D3

14

GR

EE

N21

R3

86

4K

7R

38

71

K5

D3

05

BA

V9

923 D

30

7

BA

V9

923 D

311

BA

V9

923 D

31

3

BA

V9

923

+ -IC3

00

LM

32

4D

12

13

14

+ -IC3

00

LM

32

4D

10 9

8

R3

36

3K

3R

33

73

K3

R3

24

10

0K

R3

57

10

0K

R3

67

18

0K

R3

68

1K

0

R3

74

18

0K

R3

73

1K

0

R3

71

1K

5

R3

72

5K

6C

33

51

U0

D3

05

BA

V9

93 1

D3

07

BA

V9

93 1

D3

11

BA

V9

93 1

D3

13

BA

V9

93 1

IC3

01

33

9D V-

12

V+

3

D3

00

GR

N12

D3

01

GR

N12

D3

02

GR

N12

TP

30

0I/O

PA

D

TP

30

5I/O

PA

D

TP

30

1

I/O

PA

D

TP

30

2

I/O

PA

D

C3

20

1N

0

C3

31

1N

0

C3

28

1N

0

C3

38

1N

0

C3

39

1N

0

C3

27

1N

0

SW

10

0

8B

AN

KD

IPS

W

89

SW

10

0

8B

AN

KD

IPS

W

71

0

TP310

I/OPAD

TP311

I/OPAD

+8V

+8V

PL

1R

SS

I-A

14

PL

2R

SS

I-B

14

PA

32

H6

+8V

+8V

+5V

+8V

PA

02

H5

PA

12

H5

PA

42

H6

PA

52

H6

PL

1G

ND

15

PL

2G

ND

15

+5V

+5V

+5V

+5V

+5V

+5V

+5V

+5V

+5V

PA

72

H6

+5V

PB

72

H5

+8V

+8V

RS

SI-

B

1H

6

RS

SI-

A

1H

7

RX

_G

AT

E_B

1H

5

TX

_K

EY

_A

1H

4

RX

_G

AT

E_A

1H

6 TX

_K

EY

_B

1H

3

RS

SI

CO

MP

AR

AT

OR

S

RSSI-A<RSSI-BLED1

RS_A>RS-BLED2

RSAORRS-B>80db

RS

I-A

RS

I-B



0123456789

0123456789

AB

CD

EF

GH

JK

LM

NP

QR

RE

V/I

SS

AM

EN

DM

EN

TS

DA

TE

AP

VD

D.O

.C

HK

DD

RA

WN

NO

.SH

EE

TS

:F

ILE

NA

ME

:

TA

ITE

LE

CT

RO

NIC

S

IPN

:

FIL

ED

AT

E:

ISS

UE

:ID

:.

2.S

C.

PR

OJ

EC

T:

DE

SIG

NE

R:

4

4

TA

70

3-0

1T

80

0C

HA

NG

E-O

VE

RM

OD

UL

E

a070317b

227-7

0301-0

7

14-J

ul-

05

B

TA

703-0

1H

.OV

ER

TO

OM

QT

Y:

IPN

:1

.00

02

-20

06

8-0

7IC

MC

68

HC

70

5C

8F

N1

-TIM

EP

RO

GM

ICR

O(M

EC

HP

AR

T)

P1

PR

OT

OT

YP

EM

.HA

LL

H.O

.M

.HA

LL

S.C

RA

GG

17/0

5/9

6

1A

PC

BU

PD

AT

EM

.HA

LL

H.O

.M

.HA

LL

S.C

RA

GG

07/0

6/9

6

2A

CH

AN

GE

NO

TE

TA

703-0

1:1

2/9

6:0

001

M.H

AL

LH

.O.

M.H

AL

LS

.CR

AG

G17/1

2/9

6

3A

MIG

RA

TE

DT

OU

NIC

AD

M.H

AL

LH

.O.

M.H

AL

LS

.CR

AG

G20/0

3/9

7

4A

EC

O770176.

TM

BH

.O.

M.H

AL

LJA

CK

SO

N09/0

9/9

9

5A

EC

O770212.

M.H

AL

L

6A

EC

O770128

MA

JO

RU

PD

AT

ES

AD

AM

.DH

.OM

.HA

LL

JA

CK

SO

N06/0

4/0

0

06B

EC

O720611

TB

H.O

.M

.HA

LL

07A

EC

O101400260

M.H

AL

LH

.O.

M.H

AL

LC

.LE

WIS

04F

EB

05

07B

EC

O101400323

-D

110

RO

TA

TE

M.H

AL

LH

.O.

M.H

AL

LC

.LE

WIS

14JU

L05

SH

IFT

RE

G

IC400

74H

C595

DI

14

CK

11

LE

12

RS

T

10

GN

D

8

OE

13V

CC1

6 Q0

15

Q1

1

Q2

2

Q3

3

Q4

4

Q5

5

Q6

6

Q7

7

SQ

H9

SH

IFT

RE

G

IC401

74H

C595

DI

14

CK

11

LE

12

RS

T

10

GN

D

8

OE

13V

CC1

6 Q0

15

Q1

1

Q2

2

Q3

3

Q4

4

Q5

5

Q6

6

Q7

7

SQ

H9

R421

1K

0

R470

1K

0

R420

1K

0

R469

1K

0

R432

4K

7

Q404

BC

817

D400

MR

A4004

RL

400

12V

RE

LA

Y101

RL

400

12V

RE

LA

Y

243

R433

1K

0

R431

4K

7R

430

10K

Q406

BC

817

Q405

BC

817

D401

RE

D21

R428

1K

5R

429

1K

0

R450

4K

7R

439

10K

Q408

BC

817

Q407

BC

817

D402

RE

D21

R437

1K

5R

438

1K

0

R454

4K

7R

453

10K

Q410

BC

817

Q409

BC

817

D403

RE

D21

R451

1K

5R

452

1K

0

R461

4K

7R

460

10K

Q412

BC

817

Q411

BC

817

D404

RE

D21

R458

1K

5R

459

1K

0

R465

4K

7R

464

10K

Q414

BC

817

Q413

BC

817

D405

RE

D21

R462

1K

5R

463

1K

0

R423

10K

Q400

BC

817

D408

YE

LL

OW

21

R422

1K

5

R425

10K

Q401

BC

817

D409

YE

LL

OW

21

R424

1K

5

R482

4K

7

Q422

BC

817

D414

MR

A4004

RL

401

12V

RE

LA

Y101

RL

401

12V

RE

LA

Y

243

R483

1K

0

R481

4K

7R

480

10K

Q424

BC

817

Q423

BC

817

D415

RE

D21

R478

1K

5

R479

1K

0

R487

4K

7R

486

10K

Q426

BC

817

Q425

BC

817

D416

RE

D21

R484

1K

5R

485

1K

0

R493

4K

7R

492

10K

Q428

BC

817

Q427

BC

817

D417

RE

D21

R490

1K

5R

491

1K

0

R497

4K

7R

496

10K

Q430

BC

817

Q429

BC

817

D418

RE

D21

R494

1K

5R

495

1K

0

R501

4K

7R

500

10K

Q432

BC

817

Q431

BC

817

D419

RE

D21

R498

1K

5R

499

1K

0

R472

10K

Q418

BC

817

D410

YE

LL

OW

21

R471

1K

5

R474

10K

Q419

BC

817

D411

YE

LL

OW

21

R473

1K

5

C400

100N

C401

100N

PL

41

5W

AY

R-A

NG

LE

DR

AN

GE

PL

UG

SW

400

8B

AN

KD

IPS

W

11

6

SW

400

8B

AN

KD

IPS

W

21

5

SW

400

8B

AN

KD

IPS

W

31

4

SW

400

8B

AN

KD

IPS

W

41

3

SW

400

8B

AN

KD

IPS

W

51

2

SW

400

8B

AN

KD

IPS

W

89

SW

400

8B

AN

KD

IPS

W

611

SW

400

8B

AN

KD

IPS

W

71

0

SW

401

8B

AN

KD

IPS

W

21

5

SW

401

8B

AN

KD

IPS

W

11

6

SW

401

8B

AN

KD

IPS

W

31

4

SW

401

8B

AN

KD

IPS

W

41

3

SW

401

8B

AN

KD

IPS

W

512

SW

401

8B

AN

KD

IPS

W

89

SW

401

8B

AN

KD

IPS

W

71

0

SW

401

8B

AN

KD

IPS

W

611

RL

400

12V

RE

LA

Y

978

RL

401

12V

RE

LA

Y

978

C441

1N

0

C449

1N

0

C448

1N

0

C440

1N

0

C439

1N

0

C447

1N

0

C438

1N

0

C446

1N

0

C437

1N

0

C445

1N

0

C436

1N

0

C421

1N

0

C422

1N

0

C423

1N

0

C424

1N

0

C425

1N

0

C433

1N

0

C432

1N

0

C431

1N

0

C430

1N

0

C429

1N

0

C420

1N

0

MO

SI

2M

6

SC

K2M

6L

E2M

5

+5

V

+5

V

+5

V

+5

V

+1

3V

8+

13

V8

PL

4A

LL

1A

1

PL

4A

LL

2A

2

+1

3V

8+

13

V8

PL

4F

WD

A3

+1

3V

8+

13

V8

+1

3V

8+

13

V8

+1

3V

8+

13

V8

+1

3V

8+

13

V8

PL

4R

EV

A4

PL

4M

UT

EA

5

PL

4R

SS

IA6

PL

4P

SU

A7

+1

3V

8

+1

3V

8

+1

3V

8+

13

V8

PL

4A

LL

1B

9

PL

4A

LL

2B

10

+1

3V

8+

13

V8

PL

4F

WD

B11

+1

3V

8+

13

V8

+1

3V

8+

13

V8

+1

3V

8+

13

V8

+1

3V

8+

13

V8

PL

4R

EV

B12

PL

4M

UT

EB

13

PL

4R

SS

IB14

PL

4P

SU

B15

+1

3V

8

+1

3V

8

PL

4G

ND

8

SH

IFT

RE

GIS

TE

RS

TA703-xx-xxxx Change Over Module Service Manual Wiring 83 June 2014 © Tait Limited

7 Wiring

This part contains internal wiring details for the TA703-xx-xxxx Change Over Module. It contains the following information:■ Internal Wiring Connections■ External Cable Specifications

7.1 Internal Wiring ConnectionsThe TA703-xx-xxxx Change Over Module rear panel connectors are wired to the Change Over Module Control PCB according to the table and diagram that follow:

P107 Black 4 pin XLR Plug Power Out - GND pin 3

P108 Black 4 pin XLR Plug Power Out - GND pin 4

P105 Red 4 pin XLR Plug Power Out - 13.8V pin 1

P106 Red 4 pin XLR Plug Power Out - 13.8V pin 2

P209 not connected

P100 Red Tag Strip for Coaxial Relay Control Relay Driver O/P +13.8V

P101 Brown Tag Strip for Coaxial Relay Control Relay Driver O/P RX/TX

P102 Red Tag Strip for Coaxial Relay Control Relay Driver O/P +13.8V

P103 Orange Tag Strip for Coaxial Relay Control Relay Driver O/P Base Select

P204 Black RCA Socket/s Solder tags*

P200 Yellow Black RCA Socket Reverse Power Base B Rev (B)

P208 Green Red RCA Socket Forward Power Base B Fwd (B)

P203 Blue Black RCA Socket Reverse Power Base B Rev (A)

P211 Violet Red RCA Socket Forward Power Base B Fwd (A)

* RCA socket solder tags are soldered together in pairs - Rev/Fwd (A) and Rev/Fwd (B)

Notice The diagram below reads from right to left.

Pad Wire Rear Panel Connector Function Pin/Terminal

*C160*C161

*C162

*C163 *C164

*C165

C246

D107 D108

P100P101P102P103

P105P106 P107P108

P200P203

P204

P208

P209

P211

Q10

6

Q107

R14

8

R149

SK1TSLOT

vio

let

blu

e

gre

en

ye

llow

bla

ck

ora

ng

e

bro

wn

red

red

red

red

bla

ck

bla

ck

84 Wiring TA703-xx-xxxx Change Over Module Service Manual June 2014 © Tait Limited

7.2 External Cable SpecificationsThis section provides details of the external cables required to instal the TA703-01-000X Change Over Module and the Power Monitor. The cables are supplied as follows:■ Installation Kit/Power Monitor Kit Cable IPN 219-02701-00

■ N-type to N-type cable■ 6 provided - all installation kits■ 1 provided - all power monitor kits

■ Installation Kit Cable (TA703-11-0010) IPN 219-02702-01■ 15-way D-range to 25-way D-range cable

■ Installation Kit Cable (TA703-11-0011) IPN 219-02703-01■ 15-way D-range to 25-way D-range cable■ 2 provided - installation kit TA703-12-0011 only

■ Installation Kit Cable (TA703-11-0012) IPN 219-02700-01■ 15-way D-range to 25-way D-range cable■ 2 provided - installation kit TA703-12-0012 only



■ Power Monitor Kit Cable IPN 219-00025-82■ Phono to phono red/black (or white) twin cable■ 2 provided - all power monitor kits


7.2.1 Installation Kit/Power Monitor Cable IPN 219-02701-00

Six of these cables are supplied in each TA703-01-XXXX Change Over Module Installation Kit.

One cable is also provided in each Power Monitor kit for connecting the Power Monitor to the Duplexer.

1

2

1

525

± 10

mm

Parts List

1 Plug Coax N-type Cord Captive 2 Tait 206-00010-15

2 Cable Coax 50E RG223/U2 Scrn 525mm Tait 240-00010-06

Item Description Quantity Supplier Supplier Part


7.2.2 Installation Kit Cable (TA703-11-0010) IPN 219-02702-01

Two of these cables connect the Change Over Module to the Base A and Base B T800-50-0000 Backplane. The 15-way D-ranges connect to the Change Over Module at PL1 and PL2, and the 25-way D-ranges connects to the T800 backplane at SK7.

Notice This cable is ground shielded.

Notice This cable differs according to the installation kit variant.

A list of parts and D-Range connector wiring details are on the following page.

3

3

7

4

2

5

1

6

750±1

0m

m

9 11

17

12

18

13

15

10

14

9

19

14

16

11

20

15

21 2422 2523

10 12 133

3

1

1

4

4

2

2

5

5

6

6

7

7

8

8

solder link

pins 2 and 3

solder link

pins 23 and 24


Parts List

1 15-way D-Range Skt S/B 1 Tait 240-02010-54

2 15-way D-Range Cover and Hood 1 Tait 240-06010-18

3 Heatshrink 10mm 60mm Tait 400-00020-70

4 Cable 20 Core Screened 750mm Tait 205-00010-58

5 25-way D-Range Plug S/B 1 Tait 240-06010-63


7 Wire 7/0.2 PVC Grey 80mm Tait 201-00030-08

D-range Wiring - 219-02702-01

The following table describes the wiring of the 15-way and 25-way D-Range connectors on this cable.

1 Rx Line 1 Brown 1

2 Rx Line 4 White 4

3 Tx Line 1 Red 25

4 Tx Line 4 Black 22

5 Rx Gate Orange 14

6 Forward Power Alarm Green/red 10

7 Tx Key Yellow 17

8 Reverse Power Alarm Red/blue 11

9 Rx Mute Pink 14

10 Tx Enable Blue 17

11 not connected - -


13 13.8V+ Violet 2, 3

14 Green 5

15 0V- Grey 23, 24

All remaining 25-way D-Range pins are not connected.

Notice On the 25-way D-range, pins 2 and 3, and pins 23 and 24 are solder linked. This is done to provide power and Ground from SK7 on the back plane to the TA703. 13.8V is linked in via pin 2 and pin 3 of SK7. This set up requires removal of +13.8V from the receiver line transformer.

In similar fashion Gnd is provided via linking into the Tx audio centre lines normally present at pins 23 and 24 of SK.

Links on the T800-50-0000 need to be set as follows:■ Lnk9 2-3■ Lnk10 2-3


15-way pin function wire colour 25-way pin


■ Lnk11 2-3■ Lnk12 2-3

Links 1, 2, 3, 4 and 5 on the T800-50-0000 are to be set as preferred by the customer, but are typically left open as they are used for talk-through mode and DC keying. Refer to the T800-50-0000 Service Manual for detailed setup.



Two of these cables connect the Change Over Module to the T800-50-0001 Backplane. The 15-way D-Range connects to the Change Over Module and the 25-way D-range connects to the backplane at SK7.




3

3

7

4

2

5

1

6

750±10m

m

9 11

17

12

18

13

15

10

14

9

19

14

16

11

20

15

21 2422 2523

10 12 133

3

1

1

4

4

2

2

5

5

6

6

7

7

8

8

Solder link pins 14 and 15


Cable Parts List







7 Wire 7/0.2 PVC Black 80mm Tait 201-00030-10



1 Rx Line 1 Brown 1

2 Rx Line 4 Yellow 4

3 Tx Line 1 Green 5

4 Tx Line 4 Blue 8

5 Rx Gate Violet 14


7 Tx Key Orange 15


9 Rx Mute Pink 14

10 Tx Enable Grey 15



13 13.8V+ Red 25

14 White 9

15 0V- Black 13


Notice On the 25-way D-range, pins 14 and 15 each have two wires connected.





This cable connects the Change Over Module to the T800-52-0000 Quasi-Sync Backplane. The 15-way D-range connects to the Change Over Module and the 25-way D-range connects to the T800 backplane at SK7.




3

3

7

4

2

5

1

6

75

0±10m

m

9 11

17

12

18

13

15

10

14

9

19

14

16

11

20

15

21 2422 2523

10 12 133

3

1

1

4

4

2

2

5

5

6

6

7

7

8

8


Parts List

1 15-way D Range Skt S/B 1 Tait 240-02010-54

2 15-way D Range Cover and Hood 1 Tait 240-06010-18



5 25-way D Range Skt S/B 1 Tait 240-06010-67

6 25-way D Range Cover and Hood 1 Tait 240-00010-17

7 Wire 7/0.2 PVC Black 80mm Tait 201-00030-10



1 Rx Line 1 Brown 1

2 Rx Line 4 Yellow 2

3 Tx Line 1 Green 15

4 Tx Line 4 Blue 16

5 Rx Gate Violet 14


7 Tx Key Orange 3


9 Rx Mute Pink 14

10 Tx Enable Grey 3



13 13.8V+ Red 25

14 White 11

15 0V- Black 13


On the 25-way D-range, pins 3 and 14 each have two wires connected.





This cable connects the Change Over Module to a TB7100 base station. The 15-way D-range connects to the Change Over Module and the 25-way D-range connects to back of the TB7100

The cable length is 900mm.

Parts List

1 SKT 15wy drng 125° pnl mtg 1 Tait 240-02010-54

2 CONN 15wy hood cvr drng MDJ15 1 Tait 240-06010-18

3 SLVG Si rbr 1.5mm 0.05m Tait 400-00020-05

4 CBL 6 Pair mult shld Data 0.9m Tait 206-00010-25

5 PLG 25wy drng sldr cup RoHS 1 Tait 240-00053-00

6 CONN 25wy hood cvr drng 1 Tait 240-06010-17


The following table describes the wiring of the 15-way and 25-way D-range connectors on this cable

1 Rx Audio + Brown 1

2 Rx Audio - Red 4

3 Tx Audio + Orange 5

4 Tx Audio - Yellow 8

5 Rx Gate Green 14

6 --

7 Tx Key Violet 15

8 --

9 --

10 --

11 --

12 --

13 +13.8V Blue 25

14 Grey 9

15 Ground Black/braid 13

pin 2 (linked to pin 10)

All remaining 25-way D-range pins are not connected

Item Description Quantity Supplier Supplier part

15-way pin function Wire colour 25-way pin



This cable connects the Change Over Module to a TB8100 base station. The 15-way D-range connects to the Change Over Module and the 25-way D-range connects to back of the TB8100

Note that the cable length is 900mm.

Parts List

1 SKT 15wy drng 125° pnl mtg 1 Tait 240-02010-54

2 CONN 15wy hood cvr drng MDJ15 1 Tait 240-06010-18

3 SLVG Si rbr 1.5mm 0.05m Tait 400-00020-05

4 CBL 6 Pair mult shld Data 0.9m Tait 206-00010-25

5 PLG 25wy drng sldr cup RoHS 1 Tait 240-00053-00

6 CONN 25wy hood cvr drng 1 Tait 240-06010-17


The following table describes the wiring of the 15-way and 25-way D-range connectors on this cable

1 Rx Audio + Black 1

2 Rx Audio - Brown 2

3 Tx Audio + Red 6

4 Tx Audio - Orange 7

5 Rx Gate Green 9

6 Low Forward Power Violet 11

7 Tx Key Dark Blue pin 10 (linked to pin 23)

8 High Reverse Power White 12

9 --

10 --

11 --

12 --

13 +13.8V Grey 13

14 Yellow 8

15 Ground Pink/braid 4

All remaining 25-way D-range pins are not connected

Item Description Quantity Supplier Supplier part

15-way pin function Wire colour 25-way pin


7.2.7 Power Monitor Kit Cable IPN 219-00025-82

This cable connects the power monitor to the forward and reverse power outlets of the Change Over Module. One cable connects the power monitor to Base A, the other to Base B. The black (or white) connectors indicate forward power, the red connectors indicate reverse power.

1500m

m

Parts List

1 Cable twin phono/phono red/black (or white) 1 SI Components CA1042

Item Description Qty Supplier Supplier Part


Documents

T800, TB7100, TB8100 base stations - Tait Support site · T800, TB7100, TB8100 base stations TA703 Change Over Module Service Manual M703-01-0004 · Issue 4 · June 2014. 2 TA703-xx-xxxx