MDS 05-2415A01, Rev. A APPENDIX D D-3
If you are unsure whether a Remote Maintenance Module is installed in the transceiver, open
the Diagnostics Channel and enter the STAT command. The display responds with the type of
diagnostics that are installed in the transceiver. The forth character will be
I for “installed”, or
U for “uninstalled.” The other characters describe additional details about the radio’s
configuration. Refer to Table 3-2 for a complete listing of the STAT characters.
NOTE
If a Remote Maintenance Module is installed while the power
is on, the transceiver will show that the board is NOT installed
until the DC power to the radio is shut off for at least five (5)
seconds, and then turned back on.
INSTALLATION & REPLACEMENT
Normally, the installation of the Remote Maintenance Module is done at the factory; the only
field activities are the programming of the loopback code, setting the diagnostics deviation,
and the removal and replacement of a defective assembly. This section describes the installa-
tion and removal of the Remote Maintenance Module. Refer to Chapter 4—Field Tests and
Alignments, Test ➏ for instructions on setting the loopback code and for adjusting the diag-
nostics deviation.
Physical Installation/Removal
The following procedures summarize the removal and replacement of a Remote Maintenance
Module.
To remove the module:
1. Disconnect primary power to the unit and remove the transceiver’s top cover.
2. With a slight rocking motion, remove the module from the Option 2 position (Jacks
J5 and J7) on the main transceiver board.
To install the module:
1. Disconnect primary power to the unit and remove the transceiver’s top cover.
2. Plug the module into the Option 2 position (Jacks J5 and J7) on the transceiver
motherboard.
3. Make sure connectors are fully mated, and there are no bent pins that might prevent
proper connector seating or module operation.
4. Re-apply primary power and test the system for normal operation.
5. With the HHT or PC terminal, use the
STAT command to verify the presence of the
module (see Determining the Presence of a Remote Maintenance Module, in the
preceding subsection), then program in the unit’s loopback code, set the diagnostic
level (Mode 1, 2 or 3) and check the transmit modulation level. In addition, if the
installation is a field upgrade, then Test Procedure ➏ in Chapter 4 must be followed.
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