AMG AMG4644-SF Manuel utilisateur

AMG Systems Ltd. reserves the right to make changes to this

document without notice. The information herein is

believed to

be accurate. No responsibility is assumed by AMG for its use.

Page

AMG4644

Instruction

Sheet

D16726

02.doc

AMG4644

Instruction Manual

4 Channel Video Receive Unit with Bi

directional Data

Channel

The

AMG4644

is a standalone four channel video receive unit designed to receive 4 video signals

and transmit and receive 1 data signal over one Multim

ode fibre.

The

AMG4644

is designed to be powered using an

AMG2003

standalone power supply.

The

AMG4644

is designed to operate with

AMG4643

or rackmount equivalent

AMG4644R

four channel video transmit unit in a point to point configuration.

AMG Systems Ltd. reserve

s the right to make changes to this

document without notice. The information herein is believed to

be accurate. No responsibility is assumed by AMG for its use.

Page

AMG4644

Instruction

Sheet

D16726

02.doc

Contents

Introduction

Unit Functional Schematic

................................

..................

Optical Connection

................................

.............................

Connections

Video Output Connections

................................

..................

Optical Connections

................................

...........................

Power Connection

................................

..............................

Data and Audio Channel Connections

................................

...............................

Data and Audio Channel Configuration

................................

..............................

Data Interface Connections Channel A

................................

..............................

Data Channel A Configuration

................................

............

Front Panel Indicators

Power LED

................................

..........

Video Output LED’s

................................

............................

Fibre Optic LED’s

................................

...............................

Low Speed Data LEDs

................................

.......................

Physical Information

mensions

................................

.........

Mounting Details

................................

Removal / replacement from / to the Case

................................

.........................

Safety

Maintenance and Repair

AMG Systems Ltd. reserves the right to make changes to this

document without notice. The information herein is believed to

be accurate. No responsibility is assumed by AMG for its use.

Page

AMG4644

Instruction

Sheet

D16726

02.doc

Introduction

Unit Functional Schematic

The

AMG4644

receives up to 4 video

and 1 data signals from the

AMG4643

It also transmits 1 data signal transmitted

to the

AMG4643

Optical Connection

The

AMG4644

is connected as illustrated b

elow when used with an

AMG4643

channel

transmit unit acting as a point to point system.

AMG Systems Ltd. reserves the right to make changes to this

document without notice. The information herein is belie

ved to

be accurate. No responsibility is assumed by AMG for its use.

Page

AMG4644

Instruction

Sheet

D16726

02.doc

Connections

Video Output Connections

No. of channels

................................

....

Connectors

................................

..........

75 ohm BNC Socket.

Output Impedance

...............................

75 ohm terminated.

Output Level

................................

........

1 Volt p

p nominal

Freq

uency Response

...........................

10Hz to 7MHz.

Optical Connections

PRIMARY OPTO IN

Connector

................................

............

LC/PC

Primary Optical Launch Power

............

5dBm

Transmit Wavelength

...........................

1310nm

Primary Optical Sensitivity

...................

22dBm

Receive Wavelength

............................

1550nm

Optical Fibre

................................

........

Multimode 50/125 or 62.5/125**

Note: the transmission distance is limited by the bandwidth of the Multimode optical fibre. The optical

data rate is 1.25Gbits/s. The maximum bandwidth specification at this data rate for Multimode fibre is

2km. although in most cases the units will operat

e successfully over longer fibre lengths. It is

advisable however for distances greater than 2km, to have the optical fibre tested.

Power Connection

Connector Type

................................

...

2.1mm screw lock long power jack

–

centre positive

Connector Partno.

................................

Switchcraft S761K,

AMG G16125

Supply Voltage

................................

.....

13.5 to 18.0 Volts DC.

Maximum Power

................................

5 Watts

Data and Audio Channel Connections

DATA CHANNEL A

Data Channel A

................................

...

1 channel

Data Connector

................................

....

RJ45

Channel A Interface

On Board Data Interface

–

RS232, RS422 or RS485. Selected by s

lide switch

above RJ45 connector.

RS485

–

switch position

high (closest to BNC connections)

RS422

–

switch position

–

middle

RS232

–

switch position

–

low (furthest from BNC connections)

DATA CHANNEL B

Data Channel B

................................

...

Not Present

AMG Systems Ltd. reserves the righ

t to make changes to this

document without notice. The information herein is believed to

be accurate. No responsibility is assumed by AMG for its use.

Page

AMG4644

Instruction

Sheet

D16726

02.doc

Data and Audio Ch

annel Configuration

Data and Audio Channel Configuration

The

AMG4644

and rackmount equivalent

AMG4644R

sends and receives data to/from

Channel A. Channel B is not available. Channel A is a single data interface selectable by the user with

the slide s

witch on the rear panel.

Data Interface Connections Channel A

Channel A

RJ45 Pin

No.

RS485

[switch high]

RS422

[switch mid]

RS232

[switch low]

Cat 5/6 Cable

Colour Code T568B

IN + (A)

GND

White/orange

)

Orange

White/green

Blue

White/blue

Green

IN/OUT + (A)

OUT + (A)

N/A

White/brown

IN/OUT

(B)

OUT

(B)

OUT

Brown

Note: (A) or (B) in brackets in above table refers to RS485 / RS422 data specification, not Channel A,

Cha

nnel B.

Data Channel A Configuration

Channel A is always present and allows for a RS232, RS422 (full duplex, four wire) or RS485 (half

duplex, two wire) interface depending on the position of the switch located above the RJ45 connector.

The switch signi

fies the presence of the X16004 Low Speed Data/Audio Interface Board. If there are

LED's present on the RJ45 connector then an X16003 Ethernet Interface Board is fitted.

The data input for both the RS485 and the RS422 modes detects a tri

state input condi

tion by

monitoring the differential voltage level across the input. A differential level below 600mV positive or

negative will be detected as a tri

state condition. A level above 600mV positive or negative will be

detected as a logic 1 or logic zero respec

tively. It is important therefore to terminate the RS485 bus or

the RS422 input bus using 120Ωif a pre

bias is present on the RS485 or RS422 bus.

A large number of third party equipment manufacturers apply a pre

bias on their RS485 bus. This pre

bias is

applied by pulling one arm of the RS485 bus high (+5 volts) and the other arm low (0 volts)

using high value resistors within the third party equipment. In order to ensure that the AMG equipment

detects a tri

state condition, then these resistors should h

ave a value above 5kΩ. If the third party

bias resistors are less the 750Ωthe bus can be double or triple terminated as required to ensure that a

tri

state level is detected.

Note: The Data Channel A is shipped from the factory set up for RS485 operatio

n unless otherwise

requested.

AMG Systems Ltd. reserves the right to make changes to this

document without notice. The information herein is believed to

be accurate. No responsibility is assumed by AMG for its use.

Page

AMG4644

struction

Sheet

D16726

02.doc

Front Panel Indicators

Power LED

Power

................................

...................

Green

unit powered

Off

no power applied to unit

Video Output LED’s

Video Present CH1

...........................

Green

video signal present on output BNC

Org

channel present but no video on O/P BNC

Off

no video channel present

Fibre Optic LED’s

Primary Opto Sync TX

.........................

Green

optical channel transmitting

Off

optical channel not transmitting

Primary Opto Sync RX

.........................

Green

optical channel receiving

Org

optical channel receiving but not sync.

Off

optical channel not transmitting

Low Speed Data LEDs

Channel A

Data Present TX (RS485 or RS422)

...

Green

logic zero (+V,

V) present on IN+, IN

Red

logic one (

V,V+) present on IN+, IN

Off

tri

state off or no connection on IN+, IN

Dat

a Present TX (RS232)

....................

Green

logic zero (+V) present on input IN+

Red

logic transitions present on input IN+

Off

logic one (

V) present on input IN+

This represents the data signals being transmitted on the optical fibre

Data Present RX (RS485 or

RS422)

...

Green

logic zero (+V,

V) present on OUT+, OUT

Red

logic one (

V,+V) present on OUT+, OUT

Off

tri

state off or no connection on OUT+, OUT

Data Present RX (RS232)

...................

Green

logic zero (+V) present on OUT+

Red

logic transitions present on

OUT+

Off

logic one (

V) present on OUT+

This represents the data signals being received on the optical fibre

AMG Systems Ltd. reserves the right to make changes to this

document without notice. The information herein is believed to

be accurate. No responsibility is assumed by AMG for its use.

Page

AMG4644

Instruction

Sheet

D16726

02.doc

Physical Information

Dimensions

Height

................................

..................

112mm

Width

................................

...................

170mm (excluding connectors)

Depth

................................

...................

70mm

Weight

................................

.................

750grams

Mounting Details

The AMG un

it is supplied with a clip

on mounting bracket which should be attached to a panel or wall

using 2 off 4.0mm screws, see diagram on page 1 for dimensions. The unit is clipped into the

mounting bracket, and is then held firmly in position.

Removal / repla

cement from / to the Case

Note:

The AMG unit PCB's are static sensitive. Handle with proper care and use normal electrostatic

discharge (ESD) procedures. Use properly grounded protection (for example, wrist straps) when

handling the PCB.

To remove unit

s from the case to access the data expansion boards and the daughter boards, remove

the 2 or 4 fixing screws on the rear panel and slide the PCB's out of the case.

Ensure that the fibres do not snag or get trapped.

To replace the PCB's into the case, sl

ide the PCB's gently into the case aligning the boards with the

appropriate slots. Ensure that the fibre do not snag or get trapped.

Safety

AMG Optical Fibre Products use Class 1 laser systems in accordance with EN 60825

2:2000.

It is always advisable

to follow good practice when working with optical fibre systems. This includes:



Do not stare with unprotected eyes or with any unapproved collimating device at fibre

ends or connector faces, or point them at other people.



Use only approved filtered or att

enuating viewing aids

For other safety issues and advice on good practice associated with optical fibre systems, please see

EN 60825

2:2000 or your local safety officer.

Maintenance and Repair

There are no user serviceable parts within AMG products. Se

e unit data sheet for full specification.

In case of problem or failure, please call your local support centre or contact:

AMG Systems Ltd.

3 The Omega Centre, Stratton Business Park, Biggleswade, Beds., SG18 8QB, UK.

Phone

+44 (0) 1767 600 777

Technical Support

+44 (0) 1767 604 491

techsupport@amgsystems.com

AMG Systems Ltd. reserves the right to make changes to this

document without notice. The information herein is believed to

be accurate. No responsibility is assumed by AMG fo

r its use.

Page

AMG4644

Instruction

Sheet

D16726

02.doc

This page is intentionally blank.

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