TB 9-6625-2072-24
on oscilloscope calibrator err readout adjust oscilloscope calibrator output for 0 percent on
err readout, and adjust CAL (front panel) for exactly 5 divisions.
(3) Set MAGNIFIER switch to X1.
(4) Set A VOLT/DIV switch to positions listed in table 4 and adjust oscilloscope
calibrator for 6 divisions of vertical deflection on oscilloscope. Oscilloscope calibrator err
readout will be within 3 percent of output specified in table 4.
Table 4. Attenuator Accuracy
Test instrument
Oscilloscope
VOLTS/DIV
calibrator
switch settings
output
0.005
30 mV
0.01
60 mV
0.02
120 mV
0.05
0.3 V
0.1
0.6 V
0.2
1.2 V
0.5
3.0 V
1
6.0 V
5
30.0 V
(5) Set DISPLAY switch to B.
(6) Repeat technique of (1) through (4) above for channel B VOLTS/DIV switch.
b. Adjustments. No further adjustments can be made.
17. Attenuator Compensation and Input Capacitance
a. Performance Check
(1) Set dual time base MAIN TIME/DIV switch to 20 s.
(2) Connect oscilloscope calibrator SORUCE/MEASURE CHAN 1 to TI A INPUT,
using, 50 feed through termination and 5 80 pF standardizer.
(3) Position controls as listed in (a) and (b) below:
(a) A and B VOLTS/DIV switches .005.
(b) DISPLAY switch to A.
(4) Set oscilloscope calibrator VOLTAGE output frequency to 10 kHz and output
amplitude for 6 divisions of vertical deflection on oscilloscope.
(5) Adjust standardizer for optimum square wave display.
(6) Set VOLTS/DIV switch to positions listed in table 5 and adjust oscilloscope
calibrator VOLTAGE output amplitude for 6 divisions of vertical deflection on oscilloscope.
If overshoot or undershoot is more than 2 minor divisions, perform corresponding
adjustments listed in table 5 for optimum square wave display.
