TM 11-6625-828-12
and that % M meter needle is in the broad red area on
NOTE
the lower scale of the meter. Both meters must always
Do not change the settings of the 90~
indicate these levels during amplitude localizer testing.
MOD and the 150~ MOD controls after
m. Plug a single button carbon microphone into the
the MODULATION switch is set to the
MIC jack. Normal talking into the microphone should
AMP LOC positions. Otherwise, an
produce slight fluctuations of the % M meter needle while
improperly modulated output signal
the RF meter needle should remain, steady.
will result
n. Set the MODULATION switch to 1000~. Rotate
the 1000~ MOD control to obtain readings between 0 to
k. Set the MODULATION switch to OMNI See that
100 on the lower scale of the M meter.
the RF meter needle is aligned with the red LEVEL SET
o. Set the IDENTIFIER switch to ON. See that the %
line and that the % M meter needle is in the broad green
M meter needle pulses slightly. This is an indication that
area on the lower scale of the meter. Both meters must
the identifier circuit is modulating the carrier signal US
always indicate these levels during omnitesting.
l. Set the MODULATION switch to the three AMP
LOC positions, ,
, and
, in turn, and see that the
RF meter needle is aligned with the red LEVEL SET line
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