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Page 2 of 6
AMG2783-2 Instruction
Sheet D15229-00
Introduction
Unit Functional Schematic
The
AMG2783-2
receives a 1310nm optical signal and
drops of data transmitted from a 2784 receiver. It then
inserts two video and one data signal onto the outgoing
1310nm optical signal. The video signals are inserted
on 2 consecutive channels of the 8 channels available
on the optical signal. The insert channel number of the
first video signal is set by SW1 inside the unit (see
below). The second video signal is inserted on the
subsequent channel to the one set by SW1. If a video
channel is set to a channel that already has a video
signal on it, this unit will over-write this in-coming video
signal.
Optical System Connection
The
AMG2783-n
units are designed to be connected in a ring. Up to 4
AMG2783-2
dual channel units
can be connected on the same ring. Alternatively the
AMG2783-2
can be combined with
AMG2783-1
and
AMG2783-4
, single and four channel insert unit respectively, to make up the eight video channels
on the fibre. The schematic below illustrates a system combining
AMG2783-1
,
AMG2783-2
and
AMG2783-4
units. As each unit regenerates the optical signal, the optical dynamic range between
each optically connected node is 17dB.
Note that where necessary repeaters can be added at nodes to increase the average distance
between nodes.
Connections
Video Input Connection
Connector ........................................... 75 ohm BNC Socket.
Input Impedance .................................. 75 ohm terminated.
Input Level ........................................... 1 volt p-p nominal
Frequency Response .......................... 10Hz to 5.75MHz min.
No of insert channels ........................... 2
See below for
video input channel configuration
Optical Connections
OPTO OUT
Connector ............................................FC/PC
Optical Launch Power ......................... -5dBm
Wavelength .......................................... 1310nm
OPTO IN
Connector ............................................FC/PC
Optical Sensitivity ................................ -22dBm
Wavelength .......................................... 1310nm
AMG
2783-4
4 CHANNEL VIDEO
INSERT
+
BI-D IRECTIONAL
DAT A
TX
O O
RX
OPTO SYNC
FRONT PANEL INDIC ATORS
VIDEO PRESENT
CH1
O O
CH2
CH3
O O
CH4
POW ER
O
GND
+12-16 Volts dc
O PT O
IN
VIDEO C H 1
VIDEO CH 2
VIDEO C H 3
VIDEO CH 4
OPTOO UT
G ND
O UT -
O UT +
IN-
IN+
DAT A
CONNECT IONS
INT ERNAL
RS422 /485
SW ITCHABL E
*
TX
O O
RX
DATA PRESENT
AMG
2783-2
2 CHANNEL VIDEO
INSERT
+
BI- DIRECTIONAL
DATA
TX
O O
RX
OPT O SYNC
FRO NT PANEL INDIC ATORS
VIDEO PRESENT
CH1
O O
CH2
CH3
O O
CH4
POWER
O
G ND
+ 12-16 Volts dc
OPTO IN
VIDEO C H 1
VIDEO CH 2
VIDEO C H 3
VIDEO CH 4
OPTO OUT
GND
OUT -
OUT +
IN-
IN+
DATA
CO NNECT IONS
INTERNAL
RS422 /48 5
SW ITCHABLE
*
TX
O O
RX
DATA PRESENT
AMG
2783-1
1 CHANNEL VIDEO
INSERT
+
BI- DIRECTIONAL
DATA
TX
O O
R X
OPT O SYNC
FRO NT PANEL INDIC ATORS
VIDEO PRESENT
CH1
O O
CH2
CH
3
O O
CH4
POWER
O
G ND
+ 12-16 Volts dc
OPTOIN
VIDEO C H 1
VIDEO CH 2
VIDEO C H 3
VIDEO CH 4
OPTOOUT
GND
OUT -
OUT +
IN-
IN+
DATA
CO NNECT IONS
INTERNAL
RS422 /48 5
SW ITCHABLE
*
TX
O O
R X
DATA PRESENT
AMG
2783-1
1 CHANNEL VIDEO
INSERT
+
BI- DIRECTIONAL
DATA
TX
O O
R X
OPT O SYNC
FRO NT PANEL INDIC ATORS
VIDEO PRESENT
CH1
O O
CH2
CH3
O O
CH4
POWER
O
G ND
+ 12-16 Volts dc
OPTO IN
VIDEO C H 1
VIDEO CH 2
VIDEO C H 3
VIDEO CH 4
OPTO OUT
GND
OUT -
OUT +
IN-
IN+
DATA
CO NNECT IONS
INTERNAL
RS422 /48 5
SW ITCHABLE
*
TX
O O
R X
DATA PRESENT
1
3
8
2
1
6
8
3
2784R
AMG
PRIMARY OPTO SYNC
TX
O
O
RX
VIDEO PRESENT
CH1
O
O
CH2
CH3
O
O
CH4
CH1
O O
RX
DATA
PRESENT
--- --- --- -- --- -- --- -- --- -
8 CH VIDEO RX
+
DATA TX/RX
POWER
O
PO WER
O
VIDEO PR ESENT
CH5
O
O
CH6
CH7
O
O
CH8
2
4
7
5
2783-2
2700 optics
TX
1310nm
Incoming Fibre
(from output of previous
2783-1,2,4 or 2784)
2 Video Inputs
RS422/485
1310nm
RX
Outgoing Fibre
(to input of next
2783-1,2,4 or 2784)