AMG AMG4784R User manual

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
1
of
8
AMG4783
Instruction
Sheet
D16742
-
02.doc
AMG4783 Instruction
Manual
8 Channel Video Transmit Unit with 1 Bi
-
directional Data
Channel for a Singlemode Fibre Link
The
AMG4783
is a standalone eight channel video transmit unit designed to transmit 8 video signals
and transmit and receive 1
data signal over two Singlemode fibres.
The
AMG4783
is designed to be powered using an
AMG2003
standalone power supply.
The
AMG4783
is designed to operate with
AMG4784
or rackmount equivalent
AMG4784R
eight
channel video receive unit in a point to poi
nt 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
AMG4783
Instruction
Sheet
D16742
-
02.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
Removal / replacement from / to the Case
................................
................................
.........................
7
Safety
7
Maintenance and Repair
7

AMG Systems Ltd. reserves the right to make changes to this
document without notice. The information her
ein is believed to
be accurate. No responsibility is assumed by AMG for its use.
Page
3
of
8
AMG4783
Instruction
Sheet
D16742
-
02.doc
Introduction
Unit Functional Schematic
The
AMG4783
transmits up to 8 video and
1 data signal to the
AMG4784
.
It also receives 1 data channel transmitted
from the
AMG4784
.
Optical Connection
The
AMG4783
is connected as illustrate
d below when used with an
AMG4784R
8
-
channel 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
AMG4783
Instruction
Sheet
D16742
-
02.doc
Connections
Video Input Connections
No. of channels
................................
....
8
Connector
................................
............
75 ohm BNC Socket.
Input Impedance
................................
..
75 ohm terminated.
Input Level
................................
...........
1 volt p
-
p nominal
Freque
ncy Response
...........................
10Hz to 7MHz.
Optical Connections
PRIMARY OPTO OUT
Connector
................................
............
LC/PC
Primary Optical Launch Power
............
-
5dBm
Wavelength
................................
..........
1310nm
Optical Fibre
................................
........
Singlemode
PRIMARY OPTO IN
Connector
................................
............
LC/PC
Primary Optical Sensitivity
...................
-
22dBm
Wavelength
................................
..........
1310nm
Optical Fi
bre
................................
........
Singlemode
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 posit
ion
–
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
AMG4783
Instruction
Sheet
D16742
-
02.doc
Data and Audio Channel Configuration
Data and Audio Channel Configuration
The
AMG4783
and rackmount equivalent
AMG4783R
sends and rece
ives 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
Channel A
RJ45 Pin
No.
RS485
[switch high]
RS422
[switch mid]
RS232
[switch low]
Cat 5/6 Cable
Colour Code T568B
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 w
ill 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 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 wit
hin 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 r
equired 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
AMG4783
Instruction
Sheet
D1
6742
-
02.doc
Front Panel Indicators
Power LED
Power
................................
...................
Green
-
unit powered
Off
-
no power applied to u
nit
Video Input LED’s
Video Present CH1
-
8
...........................
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
Pr
imary 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 Lt
d. 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
AMG4783
Instruction
Sheet
D16742
-
02.doc
Physical Information
Dimensions
Heigh
t
................................
..................
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. T
he 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 care 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 fixing screws on the rear panel and slide the PCB's out of th
e 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 the fibre do not snag or get trapped.
Safety
AMG Optical F
ibre 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 devic
e 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 s
afety 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 Omeg
a 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
AMG4783
Instruction
Sheet
D16742
-
02.doc
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