TB 9-6625-357-35
(17) Repeat technique of (13) through (16) above, using values listed in table 9. If
frequency counter does not indicate within limits specified, no adjustments can be made.
Table 9. High Pass
Frequency Dial Accuracy
Test instrument
Frequency counter indications
Function/arbitrary
Final HIGH
CUTOFF FREQ
Initial HIGH
generator
PASS switch
Max
Min
Hz dial settings
PASS switch
frequency
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
20
X1
200
Hz1
X1
47.619 ms
52.632
ms
20
Hz 2
60
X1
600
Hz1
X1
15.873 ms
17.544
ms
60
Hz2
200
X1
2
kHz1
X1
4.7619 ms
5.2632
ms
200
Hz2
1
Adjust function/arbitrary generator to this frequency in step (14).
2
Adjust function/arbitrary generator to this frequency in step (16) and then fine tune for indication.
b. Adjustments
(1) Adjust C211 (fig. 5) until true rms voltmeter indicates at least 0.03 V (R).
(2) Adjust P203 (fig. 3) until true rms voltmeter indicates at least 0.3 V (R).
(3) Repeat a (6) through (10) above.
(4) Adjust C316 (fig. 5) until true rms voltmeter indicates 0.0631 V (R).
(5) Repeat a (6) through (13) above.
(6) Adjust function/arbitrary generator frequency to 200 kHz as indicated on
frequency counter.
(7) Increase C327 (fig. 5) and decrease C316 (fig. 5), or decrease C327 and increase
C316, until true
rms voltmeter indicates 0.708 V
(R).
(8) Repeat a (6) through (16) above.
19. Maximum Attenuation and Rate of Attenuation
a. Performance Check
(1) Set selector switch to LOW PASS X100.
(2) Set CUTOFF FREQ Hz dial to 20.