AMG AMG4643-DR-SF User manual

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 1 of 8
AMG4643-DR-SF Instruction Sheet
D18376-01.doc
AMG4643-DR-SF
Instruction Manual
4 Channel Video Transmit Unit with Bi-directional Data
Channel for a Dual Redundant Multimode Fibre Link
The AMG4643-DR-SF is a standalone four channel video transmit unit designed to transmit 4 video
signals and transmit and receive 1 data signal over two Multimode fibres providing Dual Redundant
operation.
The AMG4643-DR-SF is designed to be powered using an AMG2003 standalone power supply.
The AMG4643-DR-SF is designed to operate with AMG4644-DR-SF or rackmount equivalent
AMG4644R-DR-SF four 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 AMG for its use.
Page 2 of 8
AMG4643-DR-SF Instruction Sheet
D18376-01.doc
Contents
Introduction 3
Unit Functional Schematic.................................................................................................................. 3
Optical Connection ............................................................................................................................. 3
Connections 4
Video Input Connections .................................................................................................................... 4
Optical Connections ........................................................................................................................... 4
Power Connection .............................................................................................................................. 4
Data and Audio Channel Connections ............................................................................................... 4
Data and Audio Channel Configuration 5
Data and Audio Channel Configuration.............................................................................................. 5
Data Interface Connections Channel A.............................................................................................. 5
Data Channel A Configuration............................................................................................................ 5
Front Panel Indicators 6
Power LED.......................................................................................................................................... 6
Video Input LED’s ............................................................................................................................... 6
Fibre Optic LED’s ............................................................................................................................... 6
Low Speed Data LEDs ....................................................................................................................... 6
Physical Information 7
Dimensions......................................................................................................................................... 7
Mounting Details................................................................................................................................. 7
Safety 7
Maintenance and Repair 7

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 3 of 8
AMG4643-DR-SF Instruction Sheet
D18376-01.doc
Introduction
Unit Functional Schematic
The AMG4643-DR-SF
transmits up to 4 video and 1
data signals to the
AMG4644R-DR-SF.
It also receives 1 data signal
transmitted from the
AMG4644R-DR-SF.
The AMG4643-DR-SF transmits and receives the optical signals from both primary and secondary
optical channels. These optical channels are transmitted on the same optical fibre in opposite
directions, operating at different wavelengths. The primary channel operates on 1550nm and the
secondary channel on 1310nm.
The AMG4643-DR-SF receives and drops off a data signal transmitted from an AMG4644R-DR-SF
receiver. It then inserts video and a data signal onto the outgoing optical signal. In normal operation
the video and data signals are transmitted on the primary output and the data received from the
primary input. The secondary optical input is independent and is regenerated on the secondary output.
At the AMG4644R-DR-SF receiver if the primary input signal is not present, the unit will shut down the
secondary output to inform the AMG4643-DR-SF that the primary signal route is not OK. The
AMG4643-DR-SF will then send out the video and data signals on its secondary output in the opposite
direction. As the primary input at the AMG4644R-DR-SF is not present the data signal will now be
taken from the secondary optical input, thus maintaining integrity of the data transmission.
Optical Connection
The AMG4643-DR-SF is connected as illustrated below when used with an AMG4644R-DR-SF
rackmount receive 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 believed to
be accurate. No responsibility is assumed by AMG for its use.
Page 4 of 8
AMG4643-DR-SF Instruction Sheet
D18376-01.doc
Connections
Video Input Connections
No. of channels....................................4
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..........................................1550nm
Secondary Optical Sensitivity..............-22dBm
Wavelength..........................................1310nm
PRIMARY OPTO IN
Connector ............................................LC/PC
Primary Optical Sensitivity...................-22dBm
Wavelength..........................................1550nm
Secondary Optical Launch Power .......-5dBm
Wavelength..........................................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 Multimode fibre is
500m, although in most cases the units will operate successfully over longer fibre lengths. It is
advisable however for distances greater than 500m, to have the optical fibre tested.
Power Connection
Connector Type...................................2.1mm screw lock long power jack –centre positive
Connector Partno.................................Switchcraft S761K, AMG G16125-00
Supply Voltage.....................................13.5 to 18.0 Volts DC.
Maximum Power .................................10 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 slide 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 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 5 of 8
AMG4643-DR-SF Instruction Sheet
D18376-01.doc
Data and Audio Channel Configuration
Data and Audio Channel Configuration
The AMG4643-DR-SF and rackmount equivalent AMG4643R-DR-SF 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 rear panel.
Data Interface Connections Channel A
RJ45 Pin
No.
Channel A
Cat 5/6 Cable
Colour Code T568B
RS485
[switch high]
RS422
[switch mid]
RS232
[switch low]
1
IN + (A)
GND
White/orange
2
IN - (B)
IN
Orange
3
White/green
4
Blue
5
White/blue
6
Green
7
IN/OUT + (A)
OUT + (A)
N/A
White/brown
8
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 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 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
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 respectively. It is important therefore to terminate the RS485 bus or
the RS422 input bus using 120Ω if 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 have a value above 5kΩ. If the third party
bias resistors are less the 750Ω the 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 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 6 of 8
AMG4643-DR-SF Instruction Sheet
D18376-01.doc
Front Panel Indicators
Power LED
Power...................................................Green - unit powered
Off - no power applied to unit
Video Input LED’s
Video Present CH1-4...........................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 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-
Data 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 7 of 8
AMG4643-DR-SF Instruction Sheet
D18376-01.doc
Physical Information
Dimensions
Height..................................................112mm
Width ...................................................170mm (excluding connectors)
Depth...................................................70mm
Weight .................................................750grams
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.
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 attenuating 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. See unit data sheet for full specification.
In case of problem or failure, please call your local support centre or contact: AMG Systems Ltd. at
3 The Omega Centre, Stratton Business Park, Biggleswade, Beds., SG18 8QB, UK.
Phone [phone]
Technical Support [phone]
Email [e-mail]

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 8 of 8
AMG4643-DR-SF Instruction Sheet
D18376-01.doc
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