TM 11-6625-1831-13
4-3. MODULE FUNCTIONAL DESCRIPTION (Cont)
OSCILLATOR AND SWITCH MODULE 1A2 - Generates moving target video and trigger signals when switch gate signal
is applied from clock and counter module 1Al. Moving target video is sent to signal processor to simulate detected moving
targets. Trigger signal is sent to test panel to trigger external oscilloscope. OSC switch selects either internal oscillator
circuit or external audio generator to create doppler signal for moving target video. FREQ potentiometer, MULT switch
and capacitors 1TB1-C1, C2, C3 and C4 select frequency of internal oscillator. BASELINE CLUTTER potentiometer
controls simulated ground clutter in moving target , video signal. TARGET LEVEL and TARGET CLUTTER
potentiometers control MT portion of moving target video signal. MT GEN switch controls + 20 Vdc to oscillator and switch
module. Setting MT GEN switch to OFF position disables moving target video and trigger signals.
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