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Figure 7 illustrates the 2X redundant return configuration board. Jumpers
in the normal default position. Jumper
(Tx2). Jumper
terminates input connector
8
5
J
J
Figure 7
2X redundant return configuration board
Figure 8 illustrates the signal flow through the 2X redundant return board:
Figure 8
2X redundant return board- signal flow
To set up the split return option:
1
Confirm that the SG4-DRT-2X is installed in lid optics slots 3 and 4, or 5 and 6.
2
Confirm that a 2X redundant return board is installed in lid return configuration board
locations 2 and 3 as illustrated in Figure 5.
3
Position
in the right-most position to terminate the output to transmitter two.
6
J
4
Connect an RF cable from the 2X redundant return board, in lid return configuration board
location 2, to CH B of the SG4-DRT-2X .
5
Connect an RF cable from the 2X redundant return board, in lid return configuration board
location 3, to CH A of the SG4-DRT-2X.
The RF cables should be approximately eight inches long and have red boots on the
connector signifying the return path.
6
If necessary, connect the appropriate return RF cables from the SG4-RF modules to each 2X
redundant board.
enables/disables signal flow to output connector
6
J
(
3
J
IN2
J5
J6
IN2
T1
J3
TERM
J5
J2
TX2
C15
J8
J6
Q1
TERM
C10
C11
J7
R7
T3
C12
TX1
T2
TX2
J6
J5
-0.5 dB
-3.5 dB
+7.5 dB
TX1
SM
Loss = 0.9 dB
STARLINE
J
) when only a single RF input is used.
C9
IN1
J4
J1
R1
J9
SM
IN2
-3.5 dB
IN1
SG4-DRT-2X Installation Sheet
7
and
are shown
5
6
J
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