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Page Title:
OPERATIONAL CHECK. (CONT) |
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 TM 11-6625-2975-12
3-9. OPERATIONAL CHECK. (CONT)
INDICATION
ACTION
DISPLAY
INDICATION
FUNCTION/
No keys lit
CONTROL
DATA ENTRY
No keys lit
RF FREQ key lit
RF SELECT
if display status is not indicated as shown
above, refer test set to higher level of
maintenance.
1020 Hz key lamp should light. if not, see
24. Press 1020 Hz key.
No changes should occur on front panel. if
25. Sequentially press 30 Hz VAR,
any change occurs, refer test set to higher
9960 FM, 9960 Hz, 400 Hz,
level of maintenance.
1300 Hz, and 3000 Hz keys.
1020 Hz key lamp should go off. if not, refer
26. Press 1020 Hz key.
test set to higher level of maintenance.
% MOD key lamp should light. if not, see para
27. Press % MOD key.
refer test set to higher level of maintenance.
RDL/DDM/MOD display should indicate 20.0. if
not, refer test set to higher level of mainte-
nance.
AUDIO STATUS display VAR % MOD indicator
should light. if not, refer test set to
higher level of maintenance.
RDL/DDM/MOD display should flash on and off.
28. Enter 44.4 percent modulation.
if not, refer test set to higher level of
maintenance.
RDL/DDM/MOD display should stop flashing.
29. Press CLEAR key.
RDL/DDM/MOD display should indicate 26.9. if
30. Enter 26.9 percent modulation.
not, refer test set to higher level of
maintenance.
STANDARD indicator key should light and
31. Press STD key.
RDL/DDM/MOD display should indicate .000.
if not, refer test set to higher level of
maintenance.
3-9
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