AMG AMG4683E 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

AMG4683E

Instruction

Sheet

D16758

02.doc

AMG4683E

Instruction Manual

8 Channel Video Transmit Unit with Bi

directional Data

Channel and Ethernet for a Multimode Fibre Link

The

AMG4683E

is a standalone eight channel video transmit unit designed to transmit 8 video signals

and transmit

and receive 1 data signal plus full duplex 100BaseT Ethernet connectivity over two

Multimode fibres.

The

AMG4683E

is designed to be powered using an

AMG2003

standalone power supply.

The

AMG4683E

is designed to operate with

AMG4684E

or rackmount equival

ent

AMG4684ER

eight

channel video receive unit in a point to point configuration.

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 AM

G for its use.

Page

AMG4683E

Instruction

Sheet

D16758

02.doc

Contents

Introduction

Unit Functional Schematic

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

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

Optical Connection

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

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

Connections

Video Input Connections

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

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

Optical Connections

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

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

Power Connection

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

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

Ethernet 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 Input LED’s

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

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

Fibre Optic LED’s

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

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

Low Speed Data LEDs

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

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

Ethernet Operation

Physical Information

Dimensions

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

.........

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 i

nformation herein is believed to

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

Page

AMG4683E

Instruction

Sheet

D16758

02.doc

Introduction

Unit Functional Schematic

The

AMG4683E

transmits up to

8 video

and 1 data and audio signals to the

AMG4684ER

It also receives up to 1 data and audio

channels transmitted from the

AMG4684ER

Ethernet connectivity is also provided

between the two units.

Optical Connection

The

AMG4683E

is connected as il

lustrated below when used with an

AMG4684E

channel receive

unit acting as a point to point system.

AMG System

s 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

AMG4683E

Instruction

Sheet

D16758

02.doc

Connections

Video Input Connections

No. of channels

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

....

Connector

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

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

75 ohm BNC Socket.

Input Impedance

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

75 ohm terminated.

Input Level

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

...........

1 volt p

p nominal

Frequency Response

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

10Hz to 7MHz.

Optical Connections

PRIMARY OPTO OUT

Connector

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

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

LC/PC

Primary Optical Launch Power

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

5dBm

Wavelength

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

..........

1310nm

Optical Fibre

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

........

Multimode 50/125 or 62.5/125**

PRIMARY OPTO IN

Connector

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

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

LC/PC

Primary Optical Sensitivity

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

22dBm

Wav

elength

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

..........

1310nm

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 Multi

mode fibre is

2km. although in most cases the units will operate 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 powe

r jack

–

centre positive

Connector Partno.

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

Switchcraft S761K, AMG G16125

Supply Voltage

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

.....

13.5 to 18.0 Volts DC.

Maximum Power

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

10 Watts

Ethernet Connection

Ethernet Data Connector

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

RJ45

Interface

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

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

Auto

negotiation up to 100BASE

TX full duplex

Ethernet

Data Rate

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

Maximum 50Mbits/s total Ethernet traffic on fibre

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 slide switch abov

e the RJ45 connector.

RS232

–

switch position

high (closest to BNC connections)

RS422

–

switch position

–

middle

RS485

–

switch position

–

low (furthest from BNC connections)

DATA CHANNEL B

Data Channel B

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

...

Not Present

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

AMG4683E

Instruction

Sheet

D16758

02.doc

Data and Audio Channel Confi

guration

Data and Audio Channel Configuration

The

AMG4683E

and rackmount equivalent

AMG4683ER

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

switch on the re

ar panel.

Data Interface Connections Channel A

Channel A

RJ45 Pin

No.

RS485

[switch low]

RS422 [switch

mid]

RS232

[switch high]

Cat 5/6 Cable

Colour Code T568B

IN + (A)

GND

White/orange

(B)

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,

Channel B.

Data C

hannel 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 signifies 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 condition by

monitorin

g 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 respectively. It is imp

ortant 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 pulli

ng 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 have 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 operation unless otherwis

requested.

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

document without notice. The information herei

n is believed to

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

Page

AMG4683E

Instruction

eet

D16758

02.doc

Front Panel Indicators

Power LED

Power

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

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

Green

unit powered

Off

no power applied to unit

Video Input LED’s

Video Present CH1

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

Green

video signal present on input BNC

R/G

channel present but no video on I/P BNC

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 Sp

eed 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

Data Present TX (RS232)

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

Green

logic zero (+V) presen

t 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

AMG4683E

Instruction

Sheet

D16758

02.doc

Ethernet Operation

In order for the AMG system to transmit Ethernet signals, an onboard RJ45 Ethernet interface or

X16003 Ethernet interface adaptor should be fitted to both the Transmit

unit and the Receive unit.

The Ethernet interface can operate at either 10Mbits/s half duplex, or 100Mbit/s full duplex, and data is

transmitted from one port the other port with the minimum of delay or buffering. The maximum

bandwidth (at 100Mbit/s full

duplex) available for transmission across the fibre link is nominally

50MBit/s.

The 100BaseT port does not implement MDI/MDIX; it should be connected with a straight though

cable to an external switch port and with a cross over cable when connected direc

tly to a PC or DTE.

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

AMG4683E

Instruction

Sheet

D16758

02.doc

Physical Information

Dimensions

Height

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

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

112mm

Width

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

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

170mm (excluding connectors)

Depth

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

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

70mm

Weight

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

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

1000grams

Mounting Details

The AMG unit 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 / replacement from / to the Case

Note:

The AMG unit PCB's are static sensitive. Handle with proper ca

re and use normal electrostatic

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

handling the PCB.

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

the 2 or 4 f

ixing 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, slide the PCB's gently into the case aligning the boards with the

appropriate slots. Ensure that t

he 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 wi

th 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 attenuating viewing aids

For other safety issues and advice on good practice associated with optic

al 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. See 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

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