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Page Title:
OPERATIONAL CHECK. (CONT) |
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 TM 11-6625-2975-12
3-9. OPERATIONAL CHECK. (CONT)
ACTION
INDICATION
RDL/DDM/MOD display should indicate 040.00.
13. Press + 10 STEP key.
If not, refer test set to higher level of
maintenance.
14. Press -10 STEP key.
RDL/DDM/MOD display should indicate 030.00.
If not, refer test set to higher level of
maintenance.
RDL/DDM/MOD display should show a contin-
15. Press and hold
key.
uous increase. If not, refer test set to
higher level of maintenance.
16. Release
key.
17. Press and hold
key.
RDL/DDM/MOD display should show a contin-
uous decrease. If not, refer test set to
higher level of maintenance.
18. Release
key.
19. Press
key.
RDL/DDM key lamp should light. If not, see
20. Enter 123.45 on DATA ENTRY keys.
RDL/DDM/MOD display should indicate 123.45
21. Press ENTER key.
and RDL (DEG) indicator should light. If
either or both of these indications do not
occur as described, refer test set to higher
level of maintenance.
22. Press STD key.
RDL/DDM/MOD display should indicate 000.00.
If not, refer test set to higher level of
maintenance.
Test set display status should be as follows:
23. Sequentially select and enter LOC
carrier frequencies of 108.10,
110.10, and 111.95 MHz.
DISPLAY
INDICATION
RDL/DDM/MOD
U/L(150 Hz), .000 DDM
AUDIO STATUS
STANDARD
(Frequency selected) MHz
MODE
LOC
RF LEVEL
-50 dB mW
RF STATUS
PH LOCK, LEVEL CAL
TONE SELECT
90 Hz, 150 Hz
3-8
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