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Page 2 of 7
AMG2783R-DR Instruction
Sheet D15232-00
Introduction
Unit Functional Schematic
The
AMG2783R DR
receives a 1310nm optical signal
from both a primary and secondary fibre input. It inserts
up to 8 video signals and data and receives a single data
channel signal transmitted from
AMG2784-DR
receiver.
In normal operation the data signal is taken from the
primary input and the video and data transmitted out on
the primary output. The secondary optical input is
independent and is regenerated on the secondary output.
If the primary input signal is not present, the 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 signal on its secondary
output. This signal will be repeated around the ring to get back to this
AMG2783R-DR.
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 video and data transmission.
If the secondary input signal is not present, the unit will assume that the route to the next unit is not
OK and send out the video and data signal on the secondary optical output. This return data will be
transmitted to the next unit around the ring in the opposite direction on th e secondary route.
Optical System Connection
The
AMG2783R-DR
units are designed to be connected in a point to point system with an
AMG2784R-DR
. The optical dynamic range between each optically connected node is 17dB.
Note that where necessary repeaters can be added to increase transmission distances.
The
AMG2784R-DR
is connected as illustrated below when used with an
AMG2783R-DR
8 channel
insert unit.
2784R-DR
2700 optics (Primary)
TX
RX
2700 optics
(Secondary)
RX
TX
1310nm
1310nm
1310nm
1310nm
8 Video Outputs
1 Data I/O
PRIMARY
OPTO IN
Primary Signal Direction
Secondary Signal Direction
SECONDARY
OPTO OUT
PRIMARY
OPTO OUT
SECONDARY
OPTO IN
( to primary input and
secondary output of next
2783-1,2,4-DR,or 2783-DR)
( From primary output and
secondary input of previous
2783-1,2,4-DR,or 2783-DR)
1
3
8
2
1
3
2
8
2784R-DR
AMG
PRIMARY OPTO SYNC
T X
O
O
RX
SECONDARY O PT O SYNC
T X
O
O
RX
VIDEO PRESENT
CH1
O
O
CH2
CH3
O
O
CH4
CH1
O
O
R X
DATA PRESENT
-------------------------
8 CH VIDEO RX
+
DATA T X/RX
POWER
O
POW ER
O
VIDEO PRESENT
CH5
O
O
CH6
CH7
O
CH8
CH1
O O
RX
DAT A PRESENT
+
Secondary Optical Fibre
Primary Optical Fibre
2783R-DR
AMG
PRIMARY OPTO SYNC
TX
O
O
RX
SECONDARY 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
POW ER
O
POW ER
O
VIDEO PRESENT
CH5
O
O
CH6
CH7
O
CH8
CH1
O
O
RX
DATA PRESENT
+
