TB 9-6625-2083-24
Table 8. Volts/Div Accuracy CH 2
Test instrument
Oscilloscope calibrator
VOLTS/DIV
VOLTAGE mode
Err display
setting
output
indication limits (%)
20 mV
100 mV
3
5 mV
25 mV
3
10 mV
50 mV
3
50 mV
250 mV
3
0.1 V
0.5 V
3
0.2 V
1 V
3
0.5 V
2.5 V
3
1 V
5 V
3
2 V
10 V
3
5 V
25 V
3
10 V
50 V
3
b. Adjustments
(1) Rotate oscilloscope calibrator knob located below EDIT FIELD pushbutton for
an Err display of 0.0%.
(2) Adjust CH 1 GAIN control (front panel) to midrange and adjust R365 (fig. 7) for
5 divisions of vertical display on TI (R).
NOTE
If R365 (fig 7) cannot be adjusted for 5 divisions display, leave
R365 (fig 7) at maximum and adjust CH 1 GAIN control for 5
divisions of vertical display.
(3) Adjust CH 2 GAIN control (front panel) for a straight line display (R).
22. CH 1 and CH 2 Volts/Div Compensation
a. Performance Check
(1) Position CH 1 and CH 2 switches as listed in (a) through (d) below:
VOLTS/DIV to 20 mV.
(a)
INPUT to DC.
(b)
MODE to CH 1.
(c)
A AND B TIME/DIV AND DELAY TIME to .2 ms.
(d)
(2) Connect oscilloscope calibrator SOURCE/MEASURE CHAN 1 to TI CH 1 and
SOURCE/MEASURE CHAN 2 to TI CH 2 input, through 50 feedthrough terminations,
and 5 80 pF standardizers.
(3) Set oscilloscope calibrator for a CHAN 1, EDGE mode output of 100 mV at 1
kHz and rotate oscilloscope calibrator knob located below EDIT FIELD pushbutton for 5
divisions of vertical deflection on TI. If TI does not display square waves with square
corners and flat tops, adjust standardizer for optimum square wave.