TB 9-4931-217-40
(2) Connect lead from chassis to one end of R20 (fig. 2).
Figure 2. Ac generator detector - top interior view.
(3) Connect equipment as shown in figure 3.
(4) Turn GEN VOLTAGE control cw out of OFF position. Allow at least 5 minutes
for equipment to warm up and stabilize.
(5) Rotate DET GAIN control fully ccw.
(6) Adjust function/arbitrary generator for a 200 mV rms (millivolts root-mean-
square) output with frequency at 1 kHz (kilohertz) and output impedance for 50 ohms.
(7) Move multimeter and cable from DET INPUT terminals to DET OUTPUT
terminals.
multimeter. Frequency counter will indicate between 990 and 1010 Hz (hertz).
(9) Adjust DET GAIN control between fully ccw and approximately one-fourth turn
cw for a convenient multimeter indication. Record multimeter indication.
(10) Increase function/arbitrary generator frequency until multimeter indication is -
30 dB (decibel) from indication recorded in (9) above. Frequency counter indication will be
2020 Hz or less.
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