TB 9-6625-2132-24
(4) Turn oscilloscope calibrator EDIT FIELD knob to bring up oscilloscope
calibrator err display and set for 0.0 percent. Adjust TI GAIN (front panel) for 5 divisions
of vertical deflection on oscilloscope (R).
(5) Set TI and oscilloscope calibrator to values listed in table 3 and adjust
oscilloscope calibrator EDIT FIELD knob for 5 divisions of vertical deflection on
oscilloscope. Oscilloscope calibrator err display will be within 2 percent of output
specified in table 3.
b. Adjustments. No further adjustments can be made.
Table 3. Attenuator Accuracy
Test instrument
Oscilloscope calibrator
Oscilloscope vertical
VOLTS/DIV
output settings
deflections
switch settings
(1 kHz)
(div)
2 mV
10 mV
5
5 mV
20 mV
4
10 mV
50 mV
5
20 mV
.1 V
5
50 mV
.2 V
4
.1 V
.5 V
5
.2 V
1 V
5
.5 V
2 V
4
1 V
5 V
5
2 V
10 V
5
5 V
20 V
4
9. Comparison Voltage and Linearity
NOTE
For Type 7A13, SN B199999 and below, perform steps (1)
through (6) below. For Type 7A13, SN B200000 and above,
perform (7) through (9) below.
a. Performance Check
(1) Position TI controls as listed in (a) through (c) below:
(a) +INPUT pushbutton to GND.
(b) VOLTS/DIV switch to 1 mV.
(c) VOLTS counter to 9.999 plus 1 digit to indicate 9.000 (cw to 0.000 for TI
with electrical counter).
(2) Connect multimeter between TI Vc OUT 0-10V jack and chassis ground.
(3) Press polarity + (positive) pushbutton. If multimeter does not indicate between
+9.985 and +10.015 V dc, perform b (1) below. Press polarity - (negative) pushbutton. If
multimeter does not indicate between -9.985 and -10.015 V dc, perform b (1) below.
(4) Adjust VOLTS counter to indicate 0.999 plus one digit to indicate 0.000 (ccw to
1.000 for TI's with electrical counter). If multimeter does not indicate between -0.994
and -1.0006 V dc, perform b (2) below.
