User's Manual

5-41
STEP PROCEDURE, CONTINUED
6 On RCVR module being replaced, remove RCVR crystal oscillator
subboard. See Figure 5-19. Retain for installation on replacement
module.
7 On RCVR module being replaced, remove RCVR capacity key. See figure
2. Retain for installation on replacement module.
INSTALL:
8
On replacement RCVR module, install RCVR crystal oscillator subboard.
See Figure 5-19.
9 On replacement RCVR module, install RCVR capacity key. See Figure 5-20.
10 Install replacement RCVR module in card cage.
11 Is RCVR equipped with front panel FREQ CONT?
If yes, go to step 12.
If no, go to step 13.
12 Perform RCV Crystal Oscillator Frequency Checks and Adjustment
procedure. Refer to Appendix E.
Optional performance checks, including RSL, BER and RCVR Threshold are
provided in Appendix E.
13 Was RCVR switched on step 2?
If yes, go to step 14.
If no, go to step 17.
14 On AE-37( ) Controller, toggle OVRD switch to disable override (unlocks
on-line RCVR and restores automatic switching functions).
15 Open Control screen.
16 On Control screen, under heading IN-SERVICE, highlight A RCVR On
Line or B RCVR On Line and select Yes on confirmation message to
force opposite side RCVR off line.
17 STOP. This procedure is complete.
Note