TB 9 6625-357-24
(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 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 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 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.
(16) Adjust function generator frequency until true rms voltmeter indicates 0.708 V. If
frequency counter does not indicate between 198 and 242 kHz, perform b (6) through (8) below.
(17) Repeat technique of (13) through (16) above, using values listed in table 5. If
frequency counter does not indicate within limits specified, no adjustments can be made.
Table 5. High Pass Frequency Dial Accuracy
Test instrument
Frequency counter indications
Final HIGH
Function generator
CUTOFF FREQ
Initial HIGH
PASS switch
frequency
Hz dial settings
PASS switch
Max
Min
settings
settings
60
X1K
600
kHz
X10K
540
kHz
660
kHz
180
X1K
1.8 MHz
X10K
1.62 MHz
1.98 MHz
200
X100
200
kHz
X1K
190
kHz
210
kHz
60
X100
60
kHz
X1K
57
kHz
63
kHz
20
X100
20
kHz
X1K
19
kHz
21
kHz
20
X10
2
kHz
X100
1.9 kHz
2.1
kHz
60
X10
6
kHz
X100
5.7 kHz
6.3
kHz
200
X10
20
kHz
X100
19
kHz
21
kHz
200
X1
2
kHz
X10
1.9 kHz
2.1
kHz
60
X1
600
Hz
X10
1.5873 ms
1.7544 ms
20
X1
200
Hz
X10
4.7619 ms
5.2632 ms
Hz1
20
X1
200
X1
47.619 ms
52.632
ms
Hz 2
20
Hz1
60
X1
600
X1
15.873 ms
17.544
ms
Hz2
60
kHz1
200
X1
2
X1
4.7619 ms
5.2632
ms
Hz2
200
1
Adjust function generator to this frequency in step (14) above.
2
9
