AMG AMG3604N-DR 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 11
AMG3604N-DR Instruction Sheet
D19005-00.doc
AMG3604N-DR
Instruction Manual
Single Channel Receive Unit with Bi-directional Data
Channel for a Dual Redundant fibre ring - includes AMG
NMS Network Management Interface
The AMG3604N-DR is a standalone single channel receive unit designed to transmit and receive one
bi-directional data channel to multiple AMG3603-DR units via a low speed data interface on a
multimode optical fibre ring with Dual Redundant operation.
The AMG3604N-DR is designed to be powered using an AMG2003 standalone power supply.
The AMG3604N-DR is designed to operate with an AMG3603-DR or rackmount equivalent
AMG3603R-DR data receive unit.

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 11
AMG3604N-DR Instruction Sheet
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Contents
Introduction 3
Unit Functional Schematic.................................................................................................................. 3
Dual Redundant Operation................................................................................................................. 3
Connections 5
Power Connection .............................................................................................................................. 5
Data and Audio Channel Connections ............................................................................................... 5
Data and Audio Channel Configuration 6
Data and Audio Channel Configuration.............................................................................................. 6
Data Interface Connections Channel A.............................................................................................. 6
Data Channel A Configuration............................................................................................................ 6
Front Panel Indicators 7
Power LED.......................................................................................................................................... 7
Fibre Optic LED’s ............................................................................................................................... 7
Network Management 8
NMS Operation................................................................................................................................... 8
SNMP ................................................................................................................................................. 8
Network Alarm Port ............................................................................................................................ 8
The Management Interface ................................................................................................................ 8
Alarm Output and Reset Operation.................................................................................................. 10
Physical Information 11
Dimensions....................................................................................................................................... 11
Mounting Details............................................................................................................................... 11
Removal / replacement from / to the Case....................................................................................... 11
Safety 11
Maintenance and Repair 11

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 11
AMG3604N-DR Instruction Sheet
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Introduction
Unit Functional Schematic
The AMG3604N-DR transmits
and receives the optical signals
from both a primary and
secondary optical channel.
These optical channels are
transmitted on two optical fibre in
opposite directions, operating at
1310nm.
The AMG3604N-DR receives and drops off data signals transmitted from AMG3603-DR insert units. It
then inserts data signals onto the outgoing optical signal to AMG3603-DR insert units.
As each unit regenerates the optical signal, the optical dynamic range between each optically
connected node is 17dB.
Dual Redundant Operation
In normal operation where optical connection to both the previous unit and subsequent insert units is
OK, data signals are transmitted on the primary output and data is received from the primary input.
The secondary optical input is independent and is regenerated on the secondary output.
If the primary input signal is not present, a unit will shut down the secondary output to inform the
previous unit that the signal route is not OK. The previous unit will then send out the data signals on its
secondary output in the opposite direction. This signal will be repeated around the ring to get back to
this unit on the secondary route. As the primary input is not present on this unit, the data signal will
now be taken from the secondary optical input thus maintaining integrity of the data transmission.
If the secondary input signal is not present, an insert unit will assume that the route to the next unit is
not OK and send out the data signal on the secondary optical output. This data will be transmitted to
the next unit around the ring in the opposite direction on the secondary route.
The AMG3604N-DR or rackmount AMG3604RN-DR is designed to be connected in a ring or point to
point system.
1310nm
1310nm
1310nm
1310nm
RS485/422/232
RS485/422/232
RS485/422/232
RS485/422/232
RS485/422/232

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 11
AMG3604N-DR Instruction Sheet
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If a fibre link is broken, operation of the ring continues by making use of the secondary optical fibre
route as below:
If multiple breaks occur, operation is maintained with all the units still physically connected to the
receiver.
RS485/422/232
RS485/422/232
RS485/422/232
RS485/422/232
RS485/422/232
RS485/422/232
RS485/422/232
RS485/422/232
RS485/422/232
RS485/422/232

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 11
AMG3604N-DR Instruction Sheet
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Connections
Optical Connections
PRIMARY OPTO OUT
Connector............................................LC/PC
Primary Optical Launch Power............-5dBm
Wavelength..........................................1310nm
Secondary Optical Sensitivity..............-22dBm
Wavelength..........................................1310nm
PRIMARY OPTO IN
Connector............................................LC/PC
Primary Optical Sensitivity...................-22dBm
Wavelength..........................................1310nm
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 6 of 11
AMG3604N-DR Instruction Sheet
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Data and Audio Channel Configuration
Data and Audio Channel Configuration
The AMG3604N-DR and rackmount equivalent AMG3604RN-DR 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 7 of 11
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Front Panel Indicators
Power LED
Power ..................................................Green - unit powered
Off - no power applied to unit
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 receiving
Secondary Opto Sync TX....................Green - optical channel transmitting
Off - optical channel not transmitting
Secondary Opto Sync RX ...................Green - optical channel receiving
Org - optical channel receiving but not sync.
Off - optical channel not receiving
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 8 of 11
AMG3604N-DR Instruction Sheet
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Network Management
Network Management of the system is provided by the AMG Management Interface which allows
Management using the AMG SNMP enabled Management software.
NMS Operation
Requires Network Management "N" option in each Rx (Receive) or Tx (Transmit) unit.
Recommended for Dual Redundant Options to give knowledge of failure
Rx collects information regarding all attached Tx units
Interface
▪9 Way D-type management port on each Rx or Tx
▪RS-232 or RS-485 on Management Port
▪Multiple Rx/Tx units use RS-485 and effectively parallel all the RS-485 ports together
▪Connect to PC RS-232 Port via RS-485/RS-232 convertor
Proprietary GUI
▪Loss of unit
▪Loss of Optical Input
▪Loss of Video Input
SNMP
SMNP Compatibility: SMNP Version 1
AMG3700 Device do NOT act as SNMP Agents
PC running AMG NMS software is the only 'true' SNMP Agent
▪Provides Proxy access to all AMG devices
▪SNMP Community String used to differentiate between AMG devices
Network Alarm Port
Alarm Output: Normally Closed
Opens when loss of :
▪Video at any insert node
▪Primary optical input at any node
▪Secondary optical input at any node
▪Any node through a power down
▪Power at the receiver
Closed by: Reset
The Management Interface
The Management Interface is fitted to AMG receivers / transmitters and is signified by a 'N' in the part
number

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 9 of 11
AMG3604N-DR Instruction Sheet
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Each management interface, thus each receiver or transmitter, has an ID number with is identified
below the management port. This ID number is used by the AMG Network Management System
(NMS) to identify the unit.
The physical interface is a 9 way female D-type connector. It supports either RS-232 or RS-485.
Management Port Pin-out:
Pin Number
RS-232 Connection
RS-485 Connection
1
-
Data B (+)
2
RD (data out of port)
Data A (-)
3
TD (data into port)
-
4
Connect to DTR held –ve or shorted
to ground
-
5
SG (signal ground)
SG (signal Ground)
6
Alarm Output
Alarm Output
7
Alarm Output
Alarm Output
8
Alarm reset (Gnd)
Alarm reset (Gnd)
9
Alarm reset
Alarm reset
For multiple Management Ports it is recommended that the RS-485 interface is used with each RS-
485 pair connected in parallel. In this case an RS-485 to RS-232 / USB converter is required in order
to connect to a standard PC Comms. Port.
The time delay between receiving a data request and sending out a response from the port is 625µs.
Therefore any RS-485 converter should have a 'turn around' time or 'transmit dwell' time equal to or
less than 625µs.
Recommended RS-485 Converter's are:
RS-485 to RS-232
Dataforth DCP485-S: Available in the UK from http://uk.farnell.com/ Order No. 300-9348
Settings on the DCP485-S:
▪RS-485 Switch Settings: 1-UP, 2-DOWN, 3-DOWN, 4-UP, 5-DOWN, 6-DOWN, 7-DOWN,
8-UP
▪RS-232 Switch Settings: 1-DOWN, 2-UP, 3-DOWN, 4-UP
▪DCE/DTE set to DCE.
RS-485 to USB
B&B 485USBTB-2W: Available in Europe from http://www.bb-europe.com/ Order No. 485USBTB-2W
Connections to management port:
Management
Port
DCP485-S
485USBTB-2W
1
2 or 4
B+
2
3 or 5
A-
5
GND
GND
NOTES:
On the DCP485-S, pins 3 and 5 are connected together and pins 2 and 4 are connected together.
On the 485USBTB-2W, there are 2 pairs of terminals both labeled A-, B+, either pair may be used.

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 10 of 11
AMG3604N-DR Instruction Sheet
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Alarm Output and Reset Operation
The alarm output and reset is designed to indicate a change of state of the fibre loop or spur attached
to the receiver. The Alarm output is a volts free contact relay output (rating: 0.5A at 125VAC or 1A at
24VDC). It normally open, which means that when not powered the contacts will be open circuit.
On power up the contacts will close and will remain closed for up to 5 seconds. During this time the
receiver will monitor and record the state of the AMG transmit units connected to the receiver.
The contacts will then remain closed until there is a change from this recorded state. A change of state
would be:
▪Addition or loss of video at any insert node
▪Addition or loss of primary optical input at any node
▪Addition or loss of secondary optical input at any node
▪Power up or down of any node
▪Loss of power at the receiver
Following a change of state the contacts will remain open, regardless of whether the alarm condition
reverts back to its previous state, until the a reset signal is presented to the alarm input connections.
The alarm reset input is biased at 5V via a 1kΩ resistor. To reset the alarm, the alarm reset is required
to be pulled to ground, either by a volt-free contact or an open collector output. The alarm output will
be held in a closed state whilst the alarm reset is connected to ground.
On release of the alarm reset, the alarm output will remain in a closed state until the next change of
state to the AMG transmit unit connected to the receiver. The alarm output may not register a change
of state which happens within 5 seconds of release of the alarm reset.