artisan 8640B - Operators Checks

Model 8640B TM 9-4935-601-14-7&P
OPERATOR'S CHECKS
m. Turn the PEAK DEVIATION vernier (16) full clockwise; the meter (3) should indicate approximately 5 and the
REDUCE FM VERNIER annunciator (4) should light.
n. Reduce FM vernier (16) until meter reads 5 kHz (the annunciator should go out). Check that RANGE (13) is set
to 0.5-1 MHz, and set PEAK DEVIATION (16) to 10 kHz; the REDUCE PEAK DEVIATION annunciator (4) should
light and the meter should indicate 0.
o. Set RANGE (13) to 1-2 MHz (the annunciator should go out) and turn the PEAK DEVIATION vernier (16) full
counterclockwise; the meter (3) should indicate 0 on the 0-10 SCALE.
Modulation Oscillator
p. Using the BNC to BNC cable, connect FM OUTPUT (17) to COUNTER INPUT (14). Set COUNTER MODE
EXPAND (5) to X100 and Source (5) to EXT 0-10. Set AUDIO OUTPUT LEVEL (21) to 1 V and MODULATION
FREQUENCY (18), in turn, to 400 Hz and 1 kHz; the FREQUENCY readout (6) should display approximately
".000400" and ".001000" MHz.
Figure 3-4. Operator's Checks (5 of 5)
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