TB 9-6625-2009-24
NOTE
It may be necessary to increase RESOLUTION
BANDWIDTH and FREQ SPAN/DIV when checking 30 kHz
and above.
Table 3. Frequency Check
Frequency counter indications (kHz)
Test instrument
Calibrator frequency
FREQUENCY control
settings (kHz)
Min
Max
settings (kHz)
0.1
0.1
0
0.2
1
1
0.9
1.1
10
10
9.9
10.1
20
20
19.9
20.1
30
30
29.9
30.1
40
40
39.9
40.1
50
50
49.9
50.1
b. Adjustments. No adjustments can be made.
9. Display Accuracy
a. Performance Check
(1) Position controls as listed in (a) through (f) below:
(a) FREQUENCY control to 00.0 kHz.
(b) RESOLUTION BANDWIDTH control to 300 Hz.
(c) FREQ SPAN/DIV control to 5 kHz.
(d) START/CTR switch to START.
(e) SWEEP MODE switch to REP.
(f) INPUT SENSITIVITY switch to CAL.
(2) The 10 kHz CAL signal and its harmonics should be repetitively swept and
appear on display as shown in figure 2. Separation between zero response and 50 kHz
harmonic will be 10 major divisions 1 minor division, or any two adjacent signals will be 2
major divisions 0.2 minor division.
b. Adjustments. No adjustments can be made.