User's Manual Part 2

Chapter 6 Maintenance
6.5.13.2 7/8” Combined Output Coupler/Detector Installation
Any RF cable, which is terminated with a SMA connector, should be
tightened with a 5/16” torque wrench to avoid over tightening and
damaging the cable connector or mating connector.
The replacement 7/8” combined output coupler/RF detector should be installed in the
following sequence:
1. Carefully line up the replacement combined output coupler/RF detector with the H6
7/8” blind mate connector visible on the HPA compartment frame backplane. The
arrow on the combined output coupler/RF detector should be pointing upwards.
2. Push the combined output coupler/RF detector into the connectors until it stops – see
Figure 6-23
.
3. Carefully line up the 7/8” EIA flange to 7/8” unflanged adapter with the combined
output coupler/RF detector output connector, which is visible through the opening in
the back of the cabinet – see Figure 6-23
. Ensure the pipe clamp is fitted loosely
around one of the connectors before they are pushed together.
4. Using two hands, push the 7/8” EIA flange to 7/8” unflanged adapter and combined
output coupler/RF detector together – see Figure 6-19
.
5. Replace the four (4) 10-32 socket head cap screws (with #10 lock washers) which
secure the 7/8” EIA flange to 7/8” unflanged adapter to the back of the cabinet – see
Figure 6-22
.
6. Tighten the pipe clamp, which is fitted around the combined output coupler/RF
detector output connector and the 7/8” EIA flange to 7/8” unflanged adapter – see
Figure 6-21
.
7. Replace the two (2) 8-32 socket head cap screws (with #8 lock washers) which secure
the combined output coupler/RF detector to the HPA compartment frame backplane –
see Figure 6-24
.
8. Re-connect the serial cable (SX03-10904-02) to the combined output coupler/RF
detector serial port – see Figure 6-20
.
9. Re-connect the RF cable (SX03-10908-05) from the combined output coupler/RF
detector forward coupling port – see Figure 6-20
.
10. Re-connect the transmission line or jumper cable to RF Output Port where applicable.
Replace the three (3) 1/4-20 hex head bolts (with 1/4” flat washers and lock
washers).
11. Switch ON the LB HPA PSU circuit breaker (CB2), located on the PDU (Combined DRU
only).
12. Switch ON the HB HPA PSU circuit breaker (CB1), located on the PDU.
13. Using the LBE GUI, place the LB sub-system (Combined DRU) or LBD sub-system
(Independent DRU) in broadcast mode.
14. Using the HBE GUI, place the HB sub-system in broadcast mode.
SX03-10000-01-M01 6-41