program "Avhf" into the system configuration memory. Upon releasing
the PROGRAM switch "done" will again appear on the display. "Bvhf"
will then appear on the display with the "vhf" portion blinking.
6 . Repeat the process for holding the PROGRAM switch momentarily in
the STORE position for "Bvhf". If a RIT or RITs are connected, "Cvhf",
" Dvhf", etc.; will also appear on the display. Simply repeat the process
used for storing "Avhf" and "Bvhf" to the system configuration memory.
7. After the radios are stored in the system configuration memory the
display will show "test", "pass", then "ALL". At this time turn the MCS
SYSTEM switch to OFF.
b . FFCS and Headset Operability
Checking the operability of the FFCS' and Headsets requires two
1 . Set the MCS PROGRAM switch on SYSTEM and the SYSTEM switch
on PROG 1.
2. The system will initialize then start conducting Built-In-Test (BIT). The
display will show "test" while BIT is being conducted.
3 . If there are no configuration discrepancies or errors, the display shows
"pass" followed immediately by the system mode "P1". If there are
configuration discrepancies or errors, the display will show "fail",
followed by error codes. If the display does show "fail" followed by the
error codes, refer to the VIS Operator's Manual and/or Unit
Maintenance Manual for troubleshooting and repair procedures.
4 . Go to the first two FFCS' and put on the headsets connected to them.
For both FFCS's, place the WORK switch on I N T , the MONITOR switch
on WK, and the INTERCOM switch on PTT.
For the full procedures on FFCS, MOS, and Headset operations refer to
the VIS Operator's Manual.
5. Communicate on the intercom by activating the headset or vehicle PTT
switch. After intercom communication has been established, cycle
through the LIVE, VOX and O/R functions of the FFCS INTERCOM
switch as well as testing the operability of the Active Noise Reduction
(ANR) switch (if present) and the PTT switch on the headsets.
6 . Repeat these actions for all remaining FFCS' and Headsets, and MOS'
if present. Additionally, test the Loudspeaker by placing the MCS
LOUDSPEAKER switch on INT and communicating.
7 . Upon completion of these procedures turn the MCS SYSTEM switch to
OFF. The post-installation operability verification procedures are