TB 9-6625-1966-24
Table 9. Dial Accuracy
Frequency counter indications
Test instrument FREQUENCY
START/STOP control settings
Min
Max
5
Hz
182
ms
222
ms
10
Hz
91
ms
111
ms
50
Hz
18
ms
22
ms
100
Hz
9.1
ms
11.1
ms
500
Hz
1.82 ms
2.22 ms
1
kHz
900
Hz
1100
Hz
5
kHz
4.5 kHz
5.5 kHz
10
kHz
9.0 kHz
11.0 kHz
kHz1
100
90
kHz
110
kHz
kHz1
50
45
kHz
55
kHz
1Set
FREQUENCY RANGE switch to X10 to X10K.
(11) Adjust TI MAN. START/MAN. STOP control fully cw frequency range switch
to X1 to X1K, and set STOP dial to 1 Hz. Frequency counter will indicate as in (9) above.
(12) Repeat technique of (9) above for TI STOP control settings listed in table 9.
Frequency counter will indicate as specified.
(13) Connect oscilloscope to function generator CHANNEL B OUTPUT.
CHANNEL
B
SINE
(14) Set function generator
function
switch
to
and
AMPLITUDE control fully cw.
(15) Position controls as listed in (a) through (d) below:
SWEEP TIME switch to 10-1 and VERNIER control to midrange.
(a)
FREQUENCY RANGE switch to X10 to X10K.
(b)
START and STOP controls fully ccw.
(c)
SWEEP MODE switch to AUTO.
(d)
(16) Adjust oscilloscope sweep time controls for suitable viewing. Oscilloscope will
indicate sine wave sweeping from 10 Hz to 100 kHz and blanking to 0 during retrace.
(17) Set TI SWEEP MODE switch to TRIG and press TRIG pushbutton.
Oscilloscope will sweep from 10 Hz to 100 kHz, blank for 4 seconds, and return to start
frequency of 10 Hz.
(18) Set TI SWEEP MODE switch to MANUAL.
(19) Rotate MANUAL control from MAN. START to MAN. STOP while observing
oscilloscope. Frequency will vary between 10 Hz and 100 kHz during rotation.
(20) Set function generator CHANNEL B function switch to PLUG-IN and
AMPLITUDE control fully cw.
(21) Connect oscilloscope to function generator CHANNEL B OUTPUT.
(22) Position controls as listed in (a) through (c) below:
(a) SWEEP TIME switch to .1 - .01.
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