VideoMUX Hardware Manual.pdf

7/21/2019 VideoMUX Hardware Manual.pdf

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VideoMUX

Hardware ManualmicroLEX Systems A/S


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The Test Solution People

The software described in this document is a proprietary product of

microLEX Systems A/S and is furnished to the user under a license for use

as specified in the license agreement. The software may be used or copied

only in accordance with the terms of the agreement.

Information in this document is subject to change without notice. No part of

this document may be reproduced or transmitted in any form or by any

means, electronic or mechanical, for any purpose, without the express

written permission of microLEX Systems A/S.

2006 microLEX Systems A/S. All rights reserved.

microLEX Systems A/SDr. Neergaards Vej 5C, DK-2970 Hoersholm

Tel.: +45-45 76 21 00, Fax: +45-45 76 22 00

Email: [email protected]

VideoMUX Hardware Manual 3


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Change and release notes


Change and release notes

Version Date By Comments

1.0 2006-01-20 CSP 1. Release1.1 2006-07-18 CSP 2. Release. Minor changes.

1.1.0.1 2006-10-11 CSP Added information on ext. P.S.

4 VideoMUX Hardware Manual


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Table of Contents


Table of Contents

1 Introduction................................................................................................................................7

1.1 References to supplemental documentation......................................................................... 7

1.2 Abbreviations....................................................................................................................... 7

2 Installation..................................................................................................................................8

2.1 Software installation ............................................................................................................8

2.2 Hardware installation ...........................................................................................................9

2.2.1 Ext. Power Supply ....................................................................................................... 9

2.2.2 Connect the VideoMUX .............................................................................................. 9

3 Functional diagram..................................................................................................................10

4 Specifications............................................................................................................................ 11

4.1 Operating speed of driver................................................................................................... 11

4.2 Specifications ..................................................................................................................... 11

4.3 Power .................................................................................................................................11

4.4 USB connection .................................................................................................................12

5 Interface....................................................................................................................................13

5.1 Front panel overview ......................................................................................................... 13

5.1.1 BNC Sync input ......................................................................................................14

5.1.2 BNC Trigger output ................................................................................................ 15

5.1.3 LED Indicators........................................................................................................ 16

5.1.4 USB USB bus ......................................................................................................... 16

5.1.5 Power connector......................................................................................................... 16

6 Internal...................................................................................................................................... 17

6.1 VideoSynch Extractor ........................................................................................................ 17

6.2 VideoMUX ........................................................................................................................ 186.3 VideoMUX Controller ....................................................................................................... 19

7 Configurations.......................................................................................................................... 20

7.1 Expansion connectors ........................................................................................................ 20

7.2 Horizontal and Vertical selection....................................................................................... 20

7.3 Synch 1 and 2 inputs .......................................................................................................... 20

8 Video Buffer ............................................................................................................................. 21

8.1 Input impedance.................................................................................................................21

8.2 Version 1 Power considerations......................................................................................... 22

8.3 Version 2 Power considerations......................................................................................... 23



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Table of Contents


9 Mechanic................................................................................................................................... 24

9.1 Front panel description ...................................................................................................... 24

9.2 Rear panel description........................................................................................................ 24

9.3 Internal mounting............................................................................................................... 25

10 Additional documentation ..................................................................................................... 26

11 Application hints.....................................................................................................................27

12 Known errors.......................................................................................................................... 28

13 Support information............................................................................................................... 29

14 Problem report........................................................................................................................30

Index..................................................................................................................................................33

Figures:

Figure 1: Functional diagram.............................................................................................................10

Figure 2: VideoMUX......................................................................................................................... 13Figure 3: BNC Sync input: Sync input stages ................................................................................ 14

Figure 4: BNC Trigger output: Trigger output stage ...................................................................... 15

Figure 5: USB USB bus: USB connector .......................................................................................16

Figure 6: VideoSynch Extractor Card................................................................................................ 17

Figure 7: VideoMUX Card ................................................................................................................18

Figure 8: VideoMUX Controller Card............................................................................................... 19

Figure 9: VideoMUX Front view ...................................................................................................... 24

Figure 10: VideoMUX Rear view...................................................................................................... 25

Figure 11: VideoMUX Internal top view........................................................................................... 25



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1 Introduction


1 Introduction

This document describes the VideoMUX. The VideoMUX is basically a dual 8 to 1

multiplexer. 8 Channels inputs. Two extra inputs are used for Vertical and Horizontal

measurements and synchronisation. Two extra inputs are added for synchronisation of

composite synch signals.

The VideoMUX system is a 16 channels multiplexer, which then consists of two

VideoMUX PCBs and one VideoMUX Controller.

The VideoMUX also includes a VideoSE (Video Sync Extractor) function. This is used for

generation of triggers to the digitizer.

1.1 References to supplemental documentation

[1]: Document name/reference/issue date

[2]: D2XX Programmer's Guide/D2XXPG31.pdf /2005

1.2 Abbreviations

Term Definition

VideoCTU Video Component Test Unit

VideoSE Video Synch Extractor

VideoMUX Video Multiplexer

PCB Printed Circuit Board

USB Universal Serial Bus



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2 Installation


2 Installation

Installation goes in two steps.

1. Software installation.

2. Hardware installation.

2.1 Software installation

Software installation consists of installing the low level driver from FTDI and installation

of the InstruWARE driver or VideoMaster from microLEX.

Current FTDI driver version is 3.01.02.

The low level driver from FTDI, may already be installed on the system. If you do not

know, check for FTD2XX.dll in C:\WinNT\System32.

Attention:

The VideoMUX comes with microLEX PID and S/N for identification, so the original

.INF files from FTDI, will not work. MicroLEX version of .INF files must be used.

The VideoMUX has two devices build in. So the installation must run twice.Once for VideoMUX and once for VideoSynchExtractor.



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2 Installation


2.2 Hardware installation

2.2.1 Ext. Power Supply

The VideoMUX is delivered with an external power supply, which is mounted with thecorrect adapter. The power supply is checked for both correct voltage and polarity. So just

plug in the power supply. The VideoMUX is protected against wrong polarity with a serial

diode. If no external power supply is present, the VideoMUX uses the USB bus power. It

only occasionally draws more than 500mA, so there will probably never be a problem if

external power is missing. Only the input range of the VideoMUX will be narrowed. But

off cause the VideoMUX will be working out of specifications, so no functionality is

guarantied.

The polarity is + at center tap. On delivered power supply the arrow must point to -

(MINUS), to get this.

2.2.2 Connect the VideoMUX

Before USB cable is connected, find out where the driver is. You will need to point out

two files. MxVideoMUX.inf and MxVideoSynchExtractor.inf.

The VideoMUX comes with a USB cable and a Power supply.1. Plug in the power supply.

2. Plug in the USB cable and follow instructions on the screen.

3. Browse to MxVideoMUX.inf and MxVideoSynchExtractor.inf.



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3 Functional diagram


3 Functional diagram

This diagram shows the basic functionality of the VideoMUX. Signal inputs are on the left and

outputs to the digitizer are to the right.

Mux 0

1234567

8H

RelayControl

Mux 1

USB

Ch 0

Ch 1

Trig Out

Synch 1

910111213141516V

Synch 2

VSE

USB Hub

USB to PC

Power

Figure 1: Functional diagram



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4 Specifications


4 Specifications

4.1 Operating speed of driver

Typical values:

Operating speed of driver:

Self test(VideoSynchExtractor) 6 Sec 1 Sec

Self test(VideoMUX) 6 Sec 1 Sec

Setup(VideoSynchExtractor) 5 mSec 1 mSec

Setup(VideoMUX) 5 mSec 1 mSec

4.2 Specifications

Specifications:

Zin (All channels) 77 Ohms +-2%

75 Ohms +-2%

(Measured channel)

Zout (Channel 0 and 1) 50 Ohms +-5%

BW > 400 MHz (-3dB)

Settle time < 5 ns

Trigger out TTL

Trigger out jitter < +-2 ns

4.3 Power

Power:

Power adapter output voltage 5.0 6.0 Volts regulated

More than 6.2 Volts may destroy

unit.

Power adapter output current Max. 1200 mA.

VideoMUX current consumption Max. 550 mA.



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4 Specifications


4.4 USB connection

The system runs on USB 2.0.

USB 1.1 is not guaranteed to work. See. Sec. 12: Known errors

Windows 2000 SP1 and XP SP1.



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5 Interface


5 Interface

This section introduces the connections to the VideoMUX.

5.1 Front panel overview

The cabinet is as wide as a standard PXI rack, to fit on top. The front panel area is as big as

needed for 16 channels input and other connectors and indicators. User connections (BNC)

are located in two rows of 9 inputs. H and V are special inputs for VGA standard. Two

synch inputs are located to the right. These inputs are to be used when the component

signal does not include synch information. As component video from a SCART connector.

It also includes Trigger out, Power LED and Synch LED from VSE Board and the two

outputs for the digitizer. CH0, CH1 and Trig are connected directly to Digitizer, through 3

30 cm long BNC RG58 cables.

The 16 Channel version consists of two VideoMUX boards, stacked and mounted directly

in the front panel. One control board is fitted and one VideoSynchExtractor is fitted on top

of control board.

H

V Trig

CH0

CH1

1 8

9 16

Sync

2 3 4 5 6 7

10 11 12 13 14 15

VideoMUX

23 BNC

HWT-095019Systems A/S

PowermicroLEX Sync1

Sync2

Channel 0, 1 and TrigAre connected to Digitizer

Figure 2: VideoMUX



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5 Interface


5.1.1 BNC Sync input

Two inputs are dedicated to horizontal and vertical synchronization,H syncand V syncand

the inputs should be used whenever the video signals do not include valid synchronization

patterns, such as RGB-video with external sync cabling.

10

+5 V

Ferritebead

120 @100 MHz

BNC

75

J3, J4

Standardtelevision

High-definitiontelevision

EL4511video syncextractor

Figure 3: BNC Sync input: Sync input stages

Input termination is can be set to 75 to reduce reflections. Two pin headers are (J3 and

J4) included to allow jumpers to be added. This requires opening of the VideoCTU

(remove four screws and remove the top cover) and mounting of two jumpers.

Caution

Only skilled personnel may open the VideoCTU. Observe the relevant precautions to avoid electrostaticdischarge. The operator must use a wrest band grounded at the Video breakout box chassis before the

internal parts are accessed.

The horizontal input may be used for sync signal with combined vertical and horizontal

sync pulses (composite sync signals).



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5 Interface


5.1.2 BNC Trigger output

A trigger is output when a valid synchronization pattern has been recognized. The trigger

can be selected to any of the standard sync pulses or the trigger can occur for a specified

line number within the field or frame.

10

+5 V

Ferritebead

Trig Out

74HC151

120 @100 MHz

Figure 4: BNC Trigger output: Trigger output stage

Trigger output is protected against externally applied transients by a current limitingresistor and clamping diodes. The ferrite bead suppresses high-frequency noise outside the

frequency range of interest by introducing hysteresis losses. The output resistance

approximates the characteristic impedance of the connection cable due to the 74HC151

device and the series resistor thus damping reflections from an un-terminated transmission

line.

The data-acquisition module must be set to high input resistance on the trigger input (1

M).

Note

The trigger output is not specified for driving a termination resistor and thetermination resistor is not required for clean trigger pulses. The output device is

specified at 4 mA loading. Using a termination resistor of 50 will reduce theoutput high level to 200 mV nominally. If termination is required within aspecific application it should consists of series-connected resistor and capacitorto avoid the standing current. Suggested initial values for the termination

network are 47 and 1 nF.



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5 Interface


5.1.3 LED Indicators

Two light-emitting diode indicators are located at the front:

Yellow: Activated whenever a valid synchronization pattern has been recognized.

Green: Activated whenever the module is activated.

5.1.4 USB USB bus

The B-style USB connector is located at the rear of the module for connection to the PC

using a standard USB cable.

3: D+ 4: GND

2: D- 1: +5V

Figure 5: USB USB bus: USB connector

The module receives set-up commands and returns status information through the USB

bus.

5.1.5 Power connector

Next to the USB connector is the Power connector. The power connector is a 3.5 mm type.

The connector is part of a USB hub mounted internally. This HUB may be replaced with

other types, so power connection may vary. But power supply is included in deliverance.



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6 Internal


6 Internal

6.1 VideoSynch Extractor

The VideoSynch Extractor generates trigger pulse for the digitizer. The VideoSynch

Extractor includes a 4 to1 multiplexer. Each of these inputs is for different purposes.

Ch 1: Receives signal from the chosen VideoMUX input channel (1-8 and H).

Ch 2: Receives signal from the chosen VideoMUX input channel (9-16 and V).

Ch 3: Receives signal directly from VideoMUX Sync1.

Ch 4: Receives signal directly from VideoMUX Sync2.

Video Sync Extraction board

EL4511

XTALNXTAL

V SYNCH SYNC

BK PV BLK

H/V IN

V IN

SYNC IN

TriggerO/E

S LOCK

C SYNC

USB

BNC

BNC

BNC

BNC

BNC

BNC

Filter

SMB

Video Amps

Sync sourcemux

Filtermux

HDTV

SDTV

CH-1

CH-2

CH-3

CH-4

00: Automatically detect01: HDTV Tri-level only10: SDTV: Bi-level only11: VGA-type only

75 Termination

(optional)

Input 1

Input 4

V sync

H sync

Linecounter

andtrigger

selection

USB-B

USB interface

Power

supply

Figure 6: VideoSynch Extractor Card



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6 Internal


6.2 VideoMUX

The VideoMUX is made of two boards, which holds the multiplexer, relays and buffer

circuits. These boards are controlled by the VideoMUX controller. This board is basically

a 64 bits digital I/O card. It is used to drive the relays on the multiplexer.

To digitizer

Ch 1

Amplifier

MUX

Ch 2Ch 3

Ch 4Ch 5Ch 6

Ch 7Ch 8

V/H

Figure 7: VideoMUX Card



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6 Internal


6.3 VideoMUX Controller

The VideoMUX controller has a USB interface like the VideoSynch Extractor.

It controls 64 input/output bits. Split up in 4 x 16 bits. Each 16 bits are used to control one

VideoMUX PCB.

VideoMUX controller board

USB

USB-B

USB interface

Powersupply

64 bit DIO

16 channels

16 channels

16 channels

16 channels

I/O I/O

Figure 8: VideoMUX Controller Card



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7 Configurations


7 Configurations

The VideoMUX is very flexible. It is basically a dual 1 to 8 multiplexer. But the system

has been prepared, so that it is possible to expand for more channels.

7.1 Expansion connectors

Every board has an extra input and output for expansion. This means that it is possible to

expand each board with another board. MultiplexerOUT has a duplicate connector, facing

opposite multiplexer OUT connector, so that it is possible to route this signal inside the

VideoMUX, to another cards expansionIN connector.

When a system is made of more than two boards, it is necessary to remove the connectorsfor the digitizer(MultiplexerOUT) on one set of boards.

7.2 Horizontal and Vertical selection

Each set of two boards, has one vertical and one horizontal input. When there are more

than two boards, the internal H and V connections must be daisy chained. Then it is

possible to select all H and V signals through relay switching (K12).

7.3 Synch 1 and 2 inputsThese inputs are direct inputs to VideoSE, and therefore not expandable. A 32 channel

version and above will only have two dedicated synch inputs.



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8 Video Buffer


8 Video Buffer

The video buffer is a THS3201 current feedback amplifier from Texas semiconductors.

The amplifier features excellent specification for BW and settling times, making it ideal

for high performance video applications. Offset voltage is a bit high, but this is not

important since VideoMaster uses video clamp to black level. This is needed, since many

video transmitters like DVDs and other consumer electronics, has DC offset on their

outputs. Sometimes up to 1 Volts. The VideoBuffer is DC coupled, and has a limit of

approx. 2.2 Volts peak. 2.0 Volts is guarantied. This value gives a limit for voltage Offset

at the input at 1.3 Volts.

8.1 Input impedance

The THS3201 is tied up as a none-inverting amplifier with AV=1.

The input impedance of 75 Ohm is achieved through 1% resistors. The actual impedance is

82/1K2=76.7 Ohm for not measured inputs, and 75.0 Ohm for the measured input.

This is necessary, because we have situations where the none-inverting input of the

THS3201 is not tied to anything. So we share the load between the input resistor mounted

at the input side of the multiplexer and a resistor mounted on the input of the THS3201.

This resistor is 3300 Ohm, which is small enough to keep a low offset value. We also havethe input impedance of the THS3201(Approx. 780 KOhm).

Resistances are:

Input of MUX: 76.7 Ohm.

Input of THS3201: ~780K Ohm. In parallel with 3300 Ohm at input.

Zin=Zin(Any input)//Zin(Measured input)// Zin(THS3201)=76.7//3300//780K=75.0 Ohm.



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8 Video Buffer


8.2 Version 1 Power considerations

The THS3201 is mounted in a SOT-23 plastic housing. This gives a limitation on how

much power the device can deliver. And how high the maximum operating temperature

can be.

The VideoMUX is a low power unit. The most power consumed is by the THS3201, so

ambient temperature for THS3201 can be set to the same value as for the unit. The

THS3201 is loaded with 100 Ohm (2 x 50 Ohm) worst case.

Total power consumption:

Quiescent current x Voltage = 9mA x 10V = 90.0mW

Max output power: (0.5 x VCC)/100 Ohm= 62.5mW

Total power: 90mW+62.5mW= 152.5mW

Tja is 255.4 C /W for THS3201 and junction temperature must be kept below 125 C.

This means that max temperature rise is:

Tja x Total power = 255.4 C /W x 152.5mW = 38.9 C.

This means that max operating temperature is:

125 C 38.9 C = 86.1 C.



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8 Video Buffer


8.3 Version 2 Power considerations

In version 2 the THS3201 is mounted in a SOIC-08 plastic housing. This gives a higher

limit for operation temperature.

The VideoMUX is a low power unit. The most power consumed is by the THS3201, soambient temperature for THS3201 can be set to the same value as for the unit. The

THS3201 is loaded with 50 Ohm.

Total power consumption:

Quiescent current x Voltage = 9mA x 10V = 90.0mW

Max output power: (0.5 x VCC)/50 Ohm= 125mW

Total power: 90mW+125mW= 215mW

Tja is 97.5 C /W for THS3201/SOIC-08 and junction temperature must be kept below 125

C.

This means that max temperature rise is:

Tja x Total power = 97.5 C /W x 215mW = 21 C.

This means that max operating temperature is:

125 C 21 C = 104 C.

So for both types, there are no heating problems.



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9 Mechanic


9 Mechanic

This section describes the connections to the VideoMUX, and the internal connections.

9.1 Front panel description

The VideoMUX cards are stacked upon each other. They are only mounted in the front

panel with the connectors.

The VideoMUX Control card is mounted in the rear of the cabinet turned 90. Connected

to the VideoMUX cards only through a 26-pin cable.

The VideoMUX cards are also connected to the VSE card. The VideoMUX card(s) and the

VSE card are mounted on top of each other. VSE card on top.

Both VSE and VideoMUX Control cards are connected to the USB Hub. The USB hub is

mounted at the rear.

H

V Trig

CH0

CH1

1 8

9 16

Sync

2 3 4 5 6 7

10 11 12 13 14 15

VideoMUX

23 BNC

HWT-095019Systems A/S

PowermicroLEX Sync1

Sync2

Channel 0, 1 and TrigAre connected to Digitizer

Figure 9: VideoMUX Front view

9.2 Rear panel description

The rear of the VideoMUX is only fitted with Power connection and USB connection.

Systems A/S

microLEX

USB Power



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9 Mechanic


Figure 10: VideoMUX Rear view

9.3 Internal mounting

This drawing shows the placement of boards and USB Hub.

In the middle, two boards are mounted on top of each other. The lower board is the

VideoMUX control board. This board controls the relays on two VideoMUX cards.

The upper board is the VSE card, which receives signals to extract and generate synch

signals from. The main feature of this card is the specific line trigger.

On the front two alike VideoMUX cards are mounted directly in the front panel. This gives

the shortest possible and best controllable routing of the video signals.

Stacked BoardsLower board:VideoMUX ControllerUpper board:VideoSynch Extractor

Stacked BoardsTwo VideoMUX boards

IDC26

Rear

Front

To lower board IDC26J11 or J12VideoMUX(Ch 1-8) to J11VideoMUX(Ch 9-16) to J12

Power USB

USB HUB

To upperboard

To lowerboard

Figure 11: VideoMUX Internal top view



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10 Additional documentation


10 Additional documentation

More detailed documentation of the VSE card can be found in the VideoCTU manual,

which can be ordered from microLEX.



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11 Application hints


11 Application hints

It is recommended to use short cable between VideoMUX and digitizer. The VideoMUX is

shipped with three 300mm long cables. A cable of just 2 m. will degrade performance even

on composite video. High frequency components will be attenuated. With standard

RG58C/U, an attenuation of approx. 0.1 0.2 dB must be expected.

The same goes for cables between UUT and VideoMUX.



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13 Support information


12 Known errors

There have been problems with some USB 1.1 connections. The communication with the

unit sometimes fails. On some systems this is seen very rarely and sometimes very often.

The only solution to this, when it happens, is to temporarily disconnect the USB cable.

After that it is necessary to reinitialize the VideoMUX.

MicroLEX Systems can provide a USB2.0 PCI card for older systems.



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Within the system warranty period, or within the valid period of a maintenance agreement,

the customer the customer is at liberty to contact microLEX Systems.

Telephone: +45 4576 2100

Fax: +45 4576 2200

Email: [email protected]



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14 Problem report

The next page is a standard template used for reporting system problems. It can be copied

and send as a fax. As an alternative bugs may be reported by emails, in this case please

insure that the mail contains similar information as the Engineering Problem Report form.



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Engineering Problem ReportOriginator

Name

Company

Date Tel. Fax.

Application

Dr. Neergaards Vej 5C2970 HoersholmDenmark

Tel.: +45 4576 2100Fax: +45 4576 2200e-mail:[email protected]

Name Version License No.

Environment

System Configuration Operating System

Report Type

Blocking Point Minor Bug

Major Bug Improvement

Bug Cosmetic

Problem Description

Reproduction of Problem

MICROLEX SYSTEMS NOTES

Received by Date Report No. Action



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Index

AApplication hints, 27

CControls and indicators, 20

F

ferrite bead, 15Front panel descriptions, 13

IInstallation, 8

Introduction, 7

PProblem report, 30

SSupport information, 29

Documents

VideoMUX Hardware Manual.pdf