TB 9-6625-091-35
8. Vertical Gain and Attenuator
a. Performance Check
(1) Connect ac calibrator (A1) to TI INPUT, using cable (B3) and, if required,
adapter (B1).
(2) Adjust ac calibrator to 1 kHz and amplitude output for 4 centimeters of vertical
deflection on oscilloscope (A2) crt. If ac calibrator does not indicate between .0686 and
.0728 volt rms, perform b(1) and (2) below.
(3) Repeat technique of (2) above for TI VOLTS/CM switch positions listed in table
Table 4. Attenuator Accuracy
Test instrument
Ac calibrator indications
(v rms).
VOLTS/CM
switch settings.
Min
Max
.1
.1372
.1456
.2
.2743
.2913
.5
.6858
.7282
1
1.372
1.456
2
2.743
2.9l3
5
6.858
7.282
10
13.716
14.564
20
27.432
29.128
b. Adjustments
(1) Adjust ac calibrator to .0707 volt rms.
(2) Adjust TI GAIN ADJ control (front panel) for 4 centimeters of vertical deflection
on oscilloscope crt.
9. Attenuator Compensation
a. Performance Check
(1) Connect square-wave generator (A3) hi amplitude output to TI INPUT, using
cable and termination supplied with square-wave generator, and if required adapter (B1).
(2) Turn TI VOLTS/CM switch to .1.
(3) Adjust square-wave generator frequency to 1 kHz and amplitude for 4
centimeters of vertical deflection on oscilloscope (A2) crt. If leading edge of square wave
does not have square corners, perform b below.
(4) Repeat technique of (2) and (3) above for TI VOLTS/CM switch settings and
adjustments listed in table 5.
5
