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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
ILS PH key lamp should light. If not, refer
32. Press ∆ ILS PH key.
to 3-11.
Test set display status should be as follows
33. Sequentially select and enter GS
for each selected frequency:
rf carrier frequencies of 329.15,
332.15, and 335.00 MHz.
DISPLAY
INDICATION
RDL/DDM/MOD
U/L(150 Hz), .000 DDM
AUDIO STATUS
STANDARD
FREQUENCY
(frequency selected) MHz
MODE
GS
RF LEVEL
-50 dB mW
RF STATUS
PH LOCK, LEVEL CAL
TONE SELECT
90 Hz, 150 Hz
FUNCTION/
No keys lit
CONTROL
DATA ENTRY
No keys lit
RF SELECT
RF FREQ key lit
If display status is not indicated as shown
above, refer test set to higher level of
maintenance.
No changes should occur on front panel. If
34. Sequentially press 1020 Hz, 30 Hz
any change occurs, refer test set to higher
VAR, 9960 FM, 9980 Hz, 400 Hz,
level of maintenance.
1300 Hz, and 3000 Hz keys.
FREQUENCY display should read 108.10. If not,
35. Enter LOC rf carrier frequency of
refer test set to higher level of maintenance.
108.10 MHz.
FREQUENCY display should read 334.700
38. Press LOC/GS key.
(paired GS frequency). If not, refer test set
to higher level of maintenance.
FREQUENCY display should read 110.100. If
37. Enter LOC rf carrier frequency of
not, refer test set to higher level of
110.10 MHz.
maintenance.
FREQUENCY display should read 334.400
38. Press LOC/GS key.
(paired GS frequency). If not, refer test
set to higher level of maintenance.
FREQUENCY display should read 111.950. If
39. Enter LOC rf carrier frequency of
not, refer test set to higher level of
111.95 MHz.
maintenance.
3-10

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