TB 9-6625-357-35
(6) Set CUTOFF FREQ Hz dial to 180 and selector switch to X10K.
(7) Adjust function/arbitrary generator frequency to 180 kHz and amplitude for 1 V
indication on true rms voltmeter.
(8) Maintain amplitude and adjust function/arbitrary generator frequency to 1.8 MHz
as indicated on frequency counter.
(10) Repeat a (12) through (15) above.
18. High Pass Dial Accuracy and Unity Gain
a. Performance Check
(1) Connect equipment as shown in figure 4.
(2) Set CUTOFF FREQ Hz dial to 20 and selector switch to HIGH PASS X1.
(3) Adjust function/arbitrary generator frequency to 2 MHz and amplitude for a
0.03-V indication on true rms voltmeter.
(4) Move true rms voltmeter connection from INPUT to OUTPUT connector. If
true rms voltmeter does not indicate between 0.0282 and 0.0318 V, perform b (1) below.
(5) Set selector switch to HIGH PASS X10K. True rms voltmeter will indicate
between 0.0318 and 0.0282 V.
(6) Set CUTOFF FREQ Hz dial to 22 and selector switch to HIGH PASS X100.
(7) Adjust function/arbitrary generator frequency to 600 kHz and amplitude for a
0.3 V indication on true rms voltmeter.
(8) Connect frequency counter to INPUT connector.
(9) Set selector switch to HIGH PASS X10K. If true rms voltmeter does not
indicate between 0.289 and 0.310 V, perform b (2) and (3) below.
(10) Set selector switch to HIGH PASS X100.
(11) Adjust function/arbitrary generator frequency to 110 kHz as indicated on
frequency counter and amplitude for a 1 V indication on true rms voltmeter.
(12) Set selector switch to HIGH PASS X10K. If true rms voltmeter does not
indicate between 0.05623 and 0.07079 V, perform b (4) and (5) below.
(13) Set selector switch to HIGH PASS X1K.
(14) Adjust function/arbitrary generator frequency to 220 kHz as indicated on
frequency counter and amplitude for a 1 V indication on true rms voltmeter.
(15) Set selector switch to HIGH PASS X10K.
0.708 V. If frequency counter does not indicate between 198 and 242 kHz, perform b (6) through
(8) below.