Manualshelf

User's Manual Part 2

ManualsBrandsUnique Broadband Systems ManualsElectronics200W Satellite Dual Repeater Unit
61626364656667686970
Chapter 6 Maintenance
6.5.13 7/8” Combined Output Coupler/RF Detector Replacement
Open or loose RF connections during operation may cause electric arcs
that can cause burns and eye injuries, as well as damage equipment.
Always ensure that the HB and LBD sub-systems have been placed in
standby mode and DC power to the HB HPA has been switched OFF.
6.5.13.1 7/8” Combined Output Coupler/RF Detector Removal
The 7/8” combined output coupler/RF detector should be removed in the following
sequence:
1. Open the electronics compartment front door.
2. Open the HPA compartment rear door.
3. Using the HBE GUI, place the HB sub-system in standby mode.
4. Using the LBE GUI, place the LB sub-system (Combined DRU) or LBD sub-system
(Independent DRU) in standby mode.
5. Switch OFF the HB HPA PSU circuit breaker (CB1), located on the PDU.
6. Switch OFF the LB HPA PSU circuit breaker (CB2), located on the PDU (Combined DRU
only).
7. Disconnect the transmission line or jumper cable from Output 1 by removing the three
(3) 1/4-20 hex head bolts (with 1/4” flat washers and lock washers) if a rigid cable is
used.
8. Disconnect the RF cable (SX03-10908-05) from the combined output coupler/RF
detector forward coupling port – see Figure 6-20
.
9. Disconnect the serial cable (SX03-10904-02) from the combined output coupler/RF
detector serial port – see Figure 6-20
.
10. Loosen 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
.
11. Remove 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
.
12. Using two hands, carefully pull the 7/8” EIA flange to 7/8” unflanged adapter from the
back of the cabinet and set it aside – see Figure 6-23
.
13. Remove the pipe clamp and set it aside.
14. Remove 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
.
15. Pull the combined output coupler/RF detector from the HPA compartment frame
backplane and set it aside – see Figure 6-25
.
SX03-10000-01-M01 6-39