TB 9-6625-357-35
(4) Adjust function/arbitrary generator to final frequency (near 2 kHz) until true
(5) Repeat technique of (2) through (4) above at settings listed in table 4. If
frequency counter does not indicate within limits specified, perform b below.
(6) Repeat technique of (2) through (5) above for INPUT 2.
Function/arbitrary generator
frequency
Frequency counter indications
Test instrument
(Hz)
(Hz)
Frequency
Selector switch
Initial
Final
Min
Max
dial settings
settings
4
LOW PASS X1K
400
4000
3880
4120
20
LOW PASS X1K
2000
20,000
19,400
20,600
20
LOW PASS X100
200
2000
1940
2060
20
LOW PASS X10
50
200
5.15ms
4.85 ms
2
LOW PASS X10K
2000
20,000
19,400
20,600
4
LOW PASS X10K
4000
40,000
38,000
42,000
20
LOW PASS X10K
20,000
200,000
190,000
210,000
4
HIGH PASS X1K
40,000
4000
3880
4120
20
HIGH PASS X1K
200,000
20,000
19,400
20,600
20
HIGH PASS X100
20,000
2000
1940
2060
20
HIGH PASS X10
2000
200
5.16ms
4.85 ms
2
HIGH PASS X10K
200,000
20,000
19,400
20,600
4
HIGH PASS X10K
400,000
40,000
38,000
42,000
20
HIGH PASS X10K
500,000
200,000
190,000
210,000
b. Adjustments
(1) If constant error exists in frequency counter indication, turn TI frequency dial to
4 and selector switch to LOW PASS X100.
(2) Adjust function/arbitrary generator output frequency to 50 Hz and output
amplitude for 1 V as indicated on true rms voltmeter.
(3) Adjust function/arbitrary generator frequency for a 400 Hz indication on
frequency counter.
(4) Adjust TI frequency dial until true rms voltmeter indicates 0.816 V.
(5) While maintaining voltage level, loosen and slip TI frequency dial to align 4 with
the indicating mark. Retighten dial.
10. Rate of Attenuation
a. Performance Check
(1) Set frequency dial to 4 and selector switch to LOW PASS X100.
