ATL-Hiperion Microwave Equipment Installation Practice.pdf

Microwave Equipment Installation Practice – Field Guide

Microwave Equipment Installation Practice Page 1

FIELD GUIDE

ATL-Hiperion

Microwave Equipment Installation Practice

PDH-Radio

Ver. 1.0

September 2010.



Information in this document is relevant only to the AT Communications Hiperion series of Digital Microwave Radio equipment and is subject to change without notice. It is not be used for any other purpose, or any other equipment. No part of this publication may be reproduced or distributed in any form or by any means, electronic or mechanical, for any purpose, without the express written permission of AT Electronic & Communication International Limited. E&OE.

© Copyright 2010 by AT Communications Limited, All Rights Reserved.

TRADEMARKS AT Communications Hiperion series

® and HINet™ are registered trademarks of AT Electronic &

Communication International Limited. Any other products or services referred to in this document are the trademarks, service marks, or product names of their respective holders. DISCLAIMER: The products and specifications, configurations, and other technical information regarding the products contained in this document are subject to change without notice. All the statements, technical information, and recommendations contained in this document are specific to the AT Communications Hiperion series of Digital Microwave Radio equipment and are believed to be accurate and reliable but are presented without warranty of any kind, and users must take full responsibility for the application of any products specified in this manual. IN NO EVENT SHALL AT COMMUNICATIONS LIMITED, OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL, OR INCIDENTAL DAMAGES, INCLUDING, WITHOUT LIMITATION, LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR INABILITY TO USE THIS DOCUMENT, EVEN IF AT COMMUNICATIONS LIMITED HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.



0.1 CONTENTS

Section Page

0.1 CONTENTS ........................................................................................................................... 3

0.2 INDEX OF FIGURES ............................................................................................................. 3

0.3 SAFETY NOTICES AND ADMONISHMENTS ...................................................................... 4

0.4 SERVICING POLICY AND RETURN OF EQUIPMENT ....................................................... 5

1 GENERAL INFORMATION ................................................................................................... 6

2 GENERAL INSTALLATION CHECKLIST .............................................................................. 7

3 PACKAGE CONTENTS AND ACCESSORIES ..................................................................... 7

4 FIBRE OPTIC CABLE CHECKLIST ...................................................................................... 7

4.1 LAYING FIBRE OPTIC CABLE ............................................................................................. 8

4.2 ROUTING FIBRE OPTIC CABLE .......................................................................................... 9

4.3 FIBRE OPTIC CABLE MAINTENANCE .............................................................................. 12

5 ANTENNA CHECKLIST ...................................................................................................... 13

5.1 ANTENNA INSTALLATION REQUIREMENTS ................................................................... 13

5.1.1 Tools Required .................................................................................................................... 13

5.1.2 Antenna Mast Requirement ................................................................................................. 13

5.1.3 Grounding the Antenna ....................................................................................................... 15

5.1.4 Antenna and Lightning Protection ....................................................................................... 16

5.1.5 Routing the IF Cable to the ODU/Antenna .......................................................................... 16

5.1.6 Antenna Alignment .............................................................................................................. 17

6 POWER SUPPLY AND CABLE CHECKLIST ..................................................................... 18

7 MAINTENANCE................................................................................................................... 19

8 GLOSSARY OF TERMS ..................................................................................................... 20

9 RECOMMENDATIONS AND STANDARDS ....................................................................... 21

0.2 INDEX OF FIGURES

Section Page

Figure 1: Proper pulling technique through conduit ................................................................................ 8

Figure 2: Procedure for pulling long fibre optic cable ............................................................................. 9

Figure 3: Route cables in raceways without loops .................................................................................. 9

Figure 4: Route cables in raceways together with copper cables......................................................... 10

Figure 5: Route cables on a cabinet door ............................................................................................. 10

Figure 6: Proper use of plastic clamps .................................................................................................. 11

Figure 7: Correct bend radius ............................................................................................................... 11

Figure 8: Wind Loading and Moments of Force .................................................................................... 14

Figure 9: Wind Loading and Moments of Force for different antennas ................................................ 14

Figure 10: Grounding of Tower and Equipment. ................................................................................... 15

Figure 11: Lightning Protection Components........................................................................................ 16



0.3 SAFETY NOTICES AND ADMONISHMENTS

This document contains safety notices in accordance with appropriate standards. In the interests of

conformity International symbols are used.

Any installation, adjustment, maintenance and repair of the equipment must only be carried out by

trained, authorised personnel. At all times, personnel must comply with any safety notices and

instructions.

Specific hazards are indicated by symbol labels on or near the affected parts of the equipment. The

labels conform to international standards, are triangular in shape, and are colored black on a yellow

background. An informative text label may accompany the symbol label.

Hazard labelling is supplemented by safety notices in the appropriate equipment manual. These

notices contain additional information on the nature of the hazard and may also specify precautions.

Warning:

These draw the attention of personnel to hazards which may cause death or injury to the operator or

others. Examples of use are cases of high voltage, laser emission, toxic substances, point of high

temperature, etc.

This equipment operates at High Voltage.

Any electrical work including connection and disconnection must be

carried out by a qualified and licensed Electrical Contractor.

At Electronic & Communication International Limited is not responsible for any damage or injury caused by incorrect or faulty electrical installation.

Alert:

These draw the attention of personnel to hazards which may cause damage to the equipment. An

example of use is the case of static electricity hazard.

Caution notices may also be used in the handbook to draw attention to matters that do not constitute

a risk of causing damage to the equipment but where there is a possibility of seriously impairing its

performance, e.g. by mishandling or gross maladjustment. Warnings and Cautions within the main

text do not incorporate labels and may be in shortened form.



0.4 SERVICING POLICY AND RETURN OF EQUIPMENT

The repair of individual units and modules of this equipment is not considered possible without factory

facilities. It is, therefore, the policy of ATECIL that faulty units or modules are returned to the local

ATCIL office for repair.

To enable an efficient, prompt after sales service to be provided for the diagnosis, repair and return of

any faulty equipment, please comply with the following requirements.

Before any item is returned, a request for the Return Materials Authorisation (RMA) number must be

requested by contacting the nearest ATECIL Links office by email or fax.

The Numbered RMA form will be returned from the nearest ATECIL Links office by email or fax.

ATECIL will not be responsible for any items sent to ATECIL without first requesting a RMA number.

Items to be sent for repair must be insured and packaged so as to provide both maximum electrostatic

and physical protection and the completed RMA Form giving the required information must be included.

ATECIL will not be responsible for any items sent to ATECIL, which are damaged in freight and

transport. Physical damage will also void any applicable warranty.

This request must be included with the item for repair, items for repair should be sent to the nearest ATECIL office or affiliate from the following list: Africa

email: [email protected] FAX: +27 8 6510 5556

Americas


Asia

email: [email protected]

Australia, New Zealand, and Pacific Islands


Europe


Russia and CIS

email: [email protected]

Middle East email: [email protected]

mailto:[email protected]









0.5 GENERAL INFORMATION

The Hiperion Digital Microwave Radios (DMR) allows transmission links to be established rapidly and easily to meet a variety of transmission needs, brings cost savings and helps rapid network rollout. This solution comprises of: antenna, outdoor unit and indoor unit.

This document describes the correct installation practice covering the installation of the a) Fibre Optic Cable, b) the Antenna IF Cable and c) the Power Cable for the ATL Hiperion series of IDU’s (Indoor Units), and is intended to be read in conjunction with the following manuals:

ATL-AOS Rev 1_0 Installation Manual

ATL-CB Redundancy Splitter

ATL-ECI PDH Installation Manual

ATL-GA IDU SDH + 7E1 Installation Manual

ATL-GH IDU Super PDH Installation Manual

ATL-GI IDU Native IP to 160 Mbps Installation Manual

ATL-GS IDU SDH + 1E1 Installation Manual

ATL-Hiperion Antenna Installation Guide

ATL-Hiperion ODU Installation Manual

ATL-MI IDU Native IP to 34 Mbps Installation Manual

ATL-MV 16T1 PDH + 4 x LAN Installation Manual

ATL-MV PDH 17E1 + 4 x LAN Installation Manual

ATL-MV PDH Installation Manual



1 GENERAL INSTALLATION CHECKLIST

In order to ensure the secure and reliable installation, operation and maintenance of the equipment, the following is an installation check list that deserves attention. Make sure the equipment is mounted securely. Ensure that the Station and Equipment “Protective” and “Silent” earths are in good condition. Ensure that the power supply to the equipment has the correct voltage and polarisation, is stable and the power cables are correctly fused. Check for the correct connection and tights of all cables, connectors and mounting fixtures. Ensure each cable is correctly labeled. For detailed installation instructions, refer to the separate installation guides as noted in the previous section. After installation, fill in the Commissioning Documents.

2 PACKAGE CONTENTS AND ACCESSORIES Please check the shipment contents and accessories against the packing list for damage and completeness. In the instance where items are missing or damaged, please contact AT Electronic & Communication International Limited within 24 hours of receiving the shipment.

3 FIBRE OPTIC CABLE CHECKLIST

Fibre optic cables are easily damaged if improperly handled or installed. It is imperative that the correct handling and installation procedures be followed to avoid damaging and/or limiting their effectiveness. The information contained in this manual serves as a guide to proper handling, installing, testing, and the troubleshooting of fibre optic cables. Generally, the following should be noted:

Do not exceed the maximum cable length, bending radius, and tensile load.

Use proper pulling techniques for cable laying.

Do not squeeze or bend the cable.

Cable installed without loops in raceways

Cable protected from sharp edges

Fibre cable installed in separate raceways from copper

Cable connector cleanliness maintained

Cable connector tight to transceivers



3.1 LAYING FIBRE OPTIC CABLE

When pulling the fibre optic cable, avoid cable twisting by using proper pulling techniques for cable

laying. Putting with twists in the cable may greatly increase the risk of breaking the fibres.

The pulling techniques for fibre optic cable installation for both wire cables and fibre optic cables are

similar. The rules below should be strictly followed:

Never pull or put strain on the connector. The connector/cable interface is not designed for

pulling.

Use a pulling grip designed for pre-connected fibre optic cables. Grips with a fixed pull ring

should use a swivel to attach the pull rope.

Monitor tension: do not exceed the maximum tensile load.

– On runs from 40m to 100m, use proper lubricants and make sure they are compatible

with the cable jacket.

– On runs over 100m, use proper lubricants and pull from the middle to both ends. If

possible, use an automated puller with tension controller.

Always use a straight pull. Use cable guides to maintain the recommended bend radius. Do

not exceed the cable bend radius as this may damage the fibres. This damage may not be

seen immediately but eventually would reduce the service life of the cable.

Figure 1: Proper pulling technique through conduit

As seen in the above figure, only a straight pull of cable through the conduit is acceptable.

When it is necessary to install a fibre optic cable with lengths of 40m or longer, lay the cable as a

figure “8" pattern on the ground to prevent twisting. The figure “8” puts a half of twist in one side of the

“8” and removes it on the other side. See the figure below:



Figure 2: Procedure for pulling long fibre optic cable

To pull the cable into a figure “8” pattern, follow up with the steps below:

Lay the cable on the ground in circles

Pull the two ends of the figure “8” and turn 360 degrees (upside down) in opposite

direction

Be careful of over-twisting of the cable.

3.2 ROUTING FIBRE OPTIC CABLE

Use proper cable pulling techniques when routing cables. Before routing fibre optic cables, follow the

instructions stated in the last section to ensure the proper pulling of the cables.

For fibre optic cable routing, take care when routing through cabinets and right angle raceways.

Make sure to install cables in raceways without loops.

Figure 3: Route cables in raceways without loops



Avoid placing fibre optic cables in raceways and conduits together with copper cables to

avoid excessive loading or twisting.

Figure 4: Route cables in raceways together with copper cables

Protect cables from excessive or frequent bending. Fibre optic cables do not have a

flexible rating, so routing on a cabinet door should be only used as a last choice. Flexible

conduit should be used in these cases.

Figure 5: Route cables on a cabinet door



Attach cables with plastic clamps with large surface areas. Avoid pinching or squeezing

the cable.

Cable clamps should be installed manually and with great care.

Figure 6: Proper use of plastic clamps

Fibre optic cables require special care during installation to ensure reliable operation. Installation

guidelines regarding minimum bend radius, tensile loads, twisting, squeezing, or pinching of cable

must be followed.

Cable connectors should be protected from contamination and scratching all the time.

Violation of any of these parameters may cause increased attenuation or permanent damage to the

cable.

Strictly follow the appropriate cable lengths stated in the installation instructions of the module, do not

exceed maximum cable lengths to ensure proper operation. Operator should be careful in maintaining

total attenuation budget when using bulkhead connectors to join cables less than maximum.

Do not exceed minimum bend radius of the fibre optic cable. Exceeding the bend radius of the cable

may cause potential damage to the fibres of the cables. This damage may not be seen immediately

but eventually would reduce the service life of the cable and lead to an expensive restringing of

cables.

Figure 7: Correct bend radius



3.3 FIBRE OPTIC CABLE MAINTENANCE

Proper cleaning of the fibre optic cable ends and transceivers is essential to minimise system

attenuation. Failure to do this may cause cross-contamination of the fibre optic cables and the mating

transceivers.

There are a variety of ways to clean fibre optic components.

Cleaning fibre optic cable ends:

Wipe off the optic spots on the end of cable connector with a wet swab through a circular

or straight wiping motion,

Do not wipe back-and-forth.

Make sure the cleanness of the swab to get rid of re-contaminating the cable.

Remove any residues with a dry swab and use canned air to remove any lint from the

cable end.

Cleaning fibre optic cable transceivers:

Select a clean lint-free swab that fits easily with the transceiver barrel. The swab should

be placed gently into the barrel of the connector and rotated freely

Do not rotate back-and-forth or round-and-round to avoid leaving any debris into the

transceiver.

Ensure that the swab is clean to remove the possibility of re-contaminating the cable.

Remove any residues with a dry swab and use dry compressed air to remove any lint

from the cable end.



4 ANTENNA CHECKLIST

The items listed in the following sections deserve to be noticed for microwave antenna installation & maintenance.

4.1 ANTENNA INSTALLATION REQUIREMENTS

4.1.1 Tools Required

The following toold are required to install and align the antenna.

Set of Spanners – fixed and adjustable

Ropes

Block and Tackle

Tower safety equipment (harness, helmet etc)

Multimeter

BNC to Banana Plug test lead, 1.8 metres (6’) long.

Compass

Inclinometer

Small portable two way radios with headsets and VOX enabled.

It ius advisable to pre install the ODU to the antenna prior to hoisting up the tower.

4.1.2 Antenna Mast Requirement

To accommodate the antennas, the antenna mast must satisfy the following requirements:

The mast or tower must be constructed of sturdy, weatherproof, non-corrosive materials, such as galvanized steel or stainless steel or construction pipe, etc.

A circular mast or tower leg diameter of between 76 mm and 115 mm is suitable for antennas up to 1800 mm in diameter.

All antennas with diameters larger than 900 mm (3’) should be fitted with Side Stays.

The tower or mast must have sufficient strength as to support the antenna in strong wind conditions. Wind loading and Moments of Force considerations applied to tower at survival windspeed of 210 km/h (125 mph) is shown by the following:



Figure 8: Wind Loading and Moments of Force

All antennas contribute to “Wind Loading” on the tower. The Standard Performance antennas contribute to a higher Wind Loading value than the High Performance antennas as noted in the following table:

.

Antenna Type and Size

Weight Fa (Max) Fs Max MT Max

mm (ft) Kg (lbs) N lbf N lbf Nm ft-lbs

HP 300 (1) 204 46 58 13 36 27

SP 600 (2) 9.9 (22) 988 222 62 14 305 225

HP 600 (2) 12.2 (27) 543 122 107 24 263 194

SP 900 (3) 15.8 (35) 1792 403 890 200 466 344

HP 900 (3) 22.5 (50) 1206 271 285 64 534 394

SP 1200 (4) 27 (60) 7865 1768 436 98 3077 2270

HP 1200 (4) 38.3 (85) 4329 973 721 162 2847 2100

SP 1800 (6) 42.8 (95) 1694 3795 4980 1115 6508 4800

HP 1800 (6) 54 (120) 12334 2773 6325 1422 5966 4400

Figure 9: Wind Loading and Moments of Force for different antennas



The mast or pole must be free from any substance that may affect the good electrical connection of the antenna; for example, paint, oil, greese or corrosion.

The antenna must be located at the elevation above ground location which was calculated in the Path Analysis and Link Performance.

The antenna must be roughly aligned to the bearing and azimuth as calculated in the Path Planning and Analysis.

4.1.3 Grounding the Antenna

To ensure the system is protected from lightning damage, it is vital that the antenna is effectively grounded. The tower or mast and lightning protection must be connected to the same common ground point using a low-resistance bonding conductor.

Figure 10: Grounding of Tower and Equipment.

Separate Lightning Strap

Bonded To Tower and Ground

Earth Mat or Grounding System Under Radio Station

Steel Tower Members

Earthed At Base

Antenna Cables Run

Away From Lightning

Conductor

Cone of Protection Afforded

By Lightning Arrestor

Antennas Mounted Below Top

Of Structure Where Possible

Equipment BondedTo Earth Mat

At Common Point

Incoming Cables

Earthed on Entry

Earth Bar Around Equipment Room

Common Point of Bonding for All Earths(but must be very effective)

Bonding of Waveguide/Coax

to Cable Tray @ Key Points



A good electrical connection from the antenna and ODU to the tower or mast using a large diameter ground wire and non-corrosive hardware. The grounding system must comply with electrical codes and safety standards that apply to the installation location. Verify the grounding operation is conducted by a qualified electrician to get rid of potential risks and damages. The ground must be periodically checked for low “Earth Resistance” and corrosion. 4.1.4 Antenna and Lightning Protection

Lightning protection is designed to protect people, property and equipment from injury or damage from both a local and adjacent lightning discharge. Sound lightning protection design is an indispensable element of a grounding system used to protect the equipment from transient and/or electrostatic discharge. The components required to protect the microwave radio installation are as follows:

2 x Surge Arrestor – Part No ATL-AN10MF70 (One Surge Arrestor is installed at each end of the IF Cable)

Grounding kit, CL-8D - AT-CN-8-Ground (The Ground Kit is installed at the point of entry into the equipment room or shelter).

Figure 11: Lightning Protection Components For optimal protection, one Surge Arrestor is located at the “N-Type” connector of the ODU and the other is located at the “N-Type” connector of the IDU. The Ground Kit is installed on the IF Cable at the point of entry into the equipment room or shelter or building. As the Surge Arrestor is designed to be sacrificial, the location should allow for easy installation and removal. 4.1.5 Routing the IF Cable to the ODU/Antenna

The antenna cable must be connected to the ODU/antenna in a manner which provides maximum protection to the IF cable. Refer to Figure 10. Refer to the “ATL-Hiperion Antenna Installation Guide” for detailed antenna installation.



The following must be considered for the IF Cable routing plan:

Does the cable route require drilling through a wall or ceiling?

Is a building plan availablr showing the desired location indicating any other existing cabling routes such as electricity, telephone or networking?

Does the building material require special tools for drilling?

Is there adequate space and drainage for installing all necessary antenna cable drip loops?

Is earthing available to connect the protective earths? The following must be observed when installing the IF Cable:

Great care must be taken when installing the IF Cable in tight or difficult locations, as bending or applying excessive force to the connectors may damage the cable.

Always allow the IF Cable to bend naturally around corners. The recommended minimum bend radius must be observed.

The IF Cable must be secured along its complete length. No part of the IF Cable should be allowed to hang free. This is particularly important for cable lengths that are installed outdoors.

– AT- Communications recommends the use of Stainless Steel Cable Ties (Cable tie,

S/S, 360 x 7.9 x 0.29 mm Part No. ATL- Metal Strip - 304SS Cable Tie) for all outdoor cable runs at a rate of one cable tie per metre of cable length.

Before sealing the outdoor connectors and permanently securing cables, verify that the installation is correct and the link is functioning correctly.

CAUTION: IF cable and cable connectors are not designed to withstand excessive force:

Do not use connectors as cable grips to pull the IF Cable through raceways or conduits.

Do not use cable connectors to support the weight of the IF Cable during or after installation.

Do not use tools to tighten connectors (finger-tighten only or to specific torque).

Make sure an adequate grounding system exists and the IF Cable is properly connected to ground. Check this with a multi-meter

Always seal connections with self vulcanising stretch tape which is then covered with a UV resistant vinyl tape.

4.1.6 Antenna Alignment

For optimal performance, the antennas must be properly aligned in both the vertical and horizontal planes. The required antenna alignment angles of direction and azimuth are derived from path planning. After physically mounting each antenna, the following items must be correct before fine alignment is carrier out to optimise the installation for maximum link performance:



Polarisation – Every antenna of a link must have the same polarisation. The default is Vertical

Polarisation.

Elevation

– The antenna must be installed at the elevation above ground, which was recommended by the Path Analysis and Link Performance calculations and subsequently confirmed by Site and Path Surveys.

Bearing

– Use a compass to set the direction of the antenna. This must be the bearing from True North that was recommended by the Path Analysis and Link Performance calculations and subsequently confirmed by Site and Path Surveys.

Azimuth

– Use an Inclinometer to set the azimuth of the antenna. This must be the angle that

was recommended by the Path Analysis and Link Performance.

To complete the antenna alignment, follow the procedure in Section 10 ANTENNA ALIGNMENT – ALL MODELS of the “ATL-Hiperion Antenna Installation Guide”

5 POWER SUPPLY AND CABLE CHECKLIST

Ensure that the power supply to the equipment is the correct voltage and polarity and that the power is stable and the voltages are within the range of the IDU Power Supply. Ensure that the Power Supply cables are correctly fused. For the incoming circuit, check against the items below:

Operation of the power switch or circuit breaker

Fuse class and rating (if applicable) and tightness of fuse fittings

Tightness of cable connections and cable gland

Size of incoming cable

Tightness of busbar connection

Earthing of panel & cable armour and resistance of earth conductors

Availability and length of cables

Indications of overload of conductors, connectors and accessories

Correctness of labels

Reliability of any protective devices.



6 MAINTENANCE

After equipment commissioning, no further maintenance by hand is required. After NMS commissioning, the monitoring centre can control the operational status of all of the equipment in the network. The following regular inspections are recommended to ensure long life system performance.

Antenna systems should be inspected once a year by qualified personnel to verify proper installation, maintenance, and the condition of equipment. This should include a comparassion of the RSL with the RSL as noted in the Commissioning Document. Note that for this comparassion, weather conditions should be similar to those at the time of installation.

The Station and System Earthings should be inspected every 12 months for integrity and low ground resistance.

Periodically check for proper connection and tightening of all cables and mounting fixtures. Make sure that the ATL-MV ODU has not been damaged, disassembled or otherwise tampered with, and remains properly grounded as described in the previous sections.

Cleaning the surface of the equipment regularly to remove dust and other deposits like salt for example, to ensure the normal operation and prolonging the useful life of the equipment.

The Surge Arrestors are designed to be sacrificial. Inspect the Surge Arrestor devices for integrity. Replace any that do not meet electrical specifications or appear suspect on physical examination.

The installation location for ATL-MV ODU should remain well ventilated.

ATECIL disclaims any liability or responsibility for the results of improper or unsafe installation practices.

The ATL-ECI IDU and ODU have no user serviceable parts internally. In the event of a hardware fault, the faulty unit must be replaced with a known functional unit and returned to ATECIL for repair.



7 GLOSSARY OF TERMS

10Base-T 10Mbit/s Baseband Unshielded Twisted Pair Cable

100Base-T 100Mbit/s Baseband Unshielded Twisted Pair Cable

AGC Automatic Gain Control

AIS Alarm Indication Signal

ALM Alarm

ATECIL AT Electronic & Communication International Limited

ATPC Automatic Transmit Power Control

AUX Auxiliary Data Channel

ADM Add/Drop Multiplexer

ATM Asynchronous Transfer Mode

BER Bit Error Rate

BERT Bit Error Rate Tester

CPU Central Processing Unit

CCITT International Telephone and Telegraph consultative committee

CIT Craft Interface Terminal

DC Direct current

DEM Demodulation

DEMUX DeMutiplex

ES Error Second

ESD Electricity-static discharge

E1 Framing specification for synchronous digital streams at 2.048Mbit/s.

EOW Engineering order wire

ETH Ethernet

FTP File Transfer Protocol

GND Ground

IF Intermediate Frequency

LAN Local Area Network

LED Light-Emitting Diode

LOS Loss of Signal

MIB Management Information Base

MSAIS Multiplex Section Alarm Indication Signal

M&C Monitor and Control

MDU Modem Unit

MUX Multiplexer/Demultiplexer

NMS Network Management System

ODU Outdoor Unit

PDH Plesiochronous Digital Hierarchy

QAM Quadrature Amplitude Modulation

PSTN Public Switched Telephone Network

RBER Remainder Bit Error Rate

RF Radio Frequency

RIM Replaceable Interface Module

RMT Remote

RLTS Received Level Threshold Second

RSL Received signal level

RSSI Received signal strength indication

RSPI Radio Synchronous Physical Interface

SDH Synchronous Digital Hierarchy

SSPA Solid State Power Amplifier

SNMP Simple network management protocol

TCA Threshold Crossing Alarm

TIM Trace Identifier Mismatch

TX Transmitter



9 RECOMMENDATIONS AND STANDARDS

The AT Communications Hiperion series Digital Microwave Radio Link equipment, as recommended in this document, has been tested and found to comply with the limits of the following recommendations and standards:

ITU-R Recommendation F.746-4: "Radio-frequency channel arrangements for radio-relay systems". ITU-R Recommendation F.1092-1: "Error performance objectives for constant bit rate digital path at or above the primary rate carried by digital radio-relay systems which may form part of the international portion of a 27 500 km hypothetical reference path". ITU-R Recommendation F.1189-1: "Error performance objectives for constant bit rate digital paths at or above the primary rate carried by digital radio-relay systems which may form part or all of the national portion of a 27 500 km hypothetical reference path". ITU-R Recommendation F.557-4: "Availability objective for radio-relay systems over a hypothetical reference circuit and a hypothetical reference digital path". ITU-T Recommendation G.826: "Error performance parameters and objectives for international, constant bit rate digital paths at or above the primary rate". ITU-T Recommendation G.827: "Availability parameters and objectives for path elements of international constant bit-rate digital paths at or above the primary rate". ITU-R Recommendation F.752-1: "Diversity techniques for radio-relay systems". ITU-R Recommendation F.1093-1: "Effects of multi-path propagation on the design and operation of line-of-sight digital radio-relay systems". ITU-R Recommendation F.385-6: “Radio Frequency Channel Arrangements for Radio Relay Systems operating in the 7 GHz Band”. ITU-R Recommendation F.386-4: “Radio Frequency Channel Arrangements for Radio Relay Systems operating in the 8 GHz Band”. ETSI EN 301 216: “Fixed Radio Systems; Point-to-point equipment; Plesiochronous Digital Hierarchy (PDH); Low and medium capacity digital radio systems operating in the frequency bands between 3 GHz and 11 GHz. ETSI EN 301 128: “Fixed Radio Systems; Point-to-point equipment; Plesiochronous Digital Hierarchy (PDH); Low and medium capacity digital radio systems operating in the 13 GHz, 15 GHz and 18 GHz frequency bands” ETSI EN 300 198: “Fixed Radio Systems; Point-to-point equipment; Parameters for radio systems for the transmission digital signals operating at 23 GHz” ITU-R Recommendation F.1101: "Characteristics of digital radio-relay systems below about 17 GHz". ETSI ETS 300 019 (Parts 1 and 2): "Equipment Engineering (EE); Environmental conditions and environmental tests for telecommunications equipment; Part 1: Classification of environmental conditions; Part 2: Specification of environmental tests".



ETSI ETS 300 132 (Part 2): "Equipment Engineering (EE); Power supply interface at the input to telecommunications equipment; Part 2: Operated by direct current (dc)". ETSI EN 300 385: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Electro-Magnetic Compatibility (EMC) standard for fixed radio links and ancillary equipment". ITU-T Recommendation G.773: "Protocol suites for Q-interfaces for management of transmission systems". IEC 60154: "Flanges for waveguides". ITU-T Recommendation G.703: "Physical/electrical characteristics of hierarchical digital interfaces". ITU-T Recommendation G.704: "Synchronous frame structures used at 1544, 6312, 2048, 8488 and 44736 Kbit/s hierarchical levels". ITU-R Recommendation F.1191-1: "Bandwidth and unwanted emissions of digital radio-relay systems" ETSI ETS 300 119: "Equipment Engineering (EE); European telecommunication standard for equipment practice". ETSI TR 101 036-1: "Fixed Radio Systems; Point-to-point equipment; Generic wordings for standards on digital radio systems characteristics; Part 1: General aspects and point-to-point equipment parameters". CEPT/ERC Recommendation 74-01: "Spurious emissions". ETSI EN 301 489-4: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Electro-Magnetic Compatibility (EMC) standard for radio equipment and services; Part 4: Specific conditions for fixed radio links and ancillary equipment and services". EEU R&TTE Directive 1999 EN60950: "ETSI CE". NTRL ANSI/UL 1950: FCC FCC Part 15 “CLASS A” digital device, pursuant to part 15 of the FCC Rules.

These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy. If not installed and used in accordance with the “Hiperion

series Installation Manual”, may cause harmful interference to radio communications.

--End of Document