TB 9-4931 444-35
SECTION IV
CALIBRATION PROCESS (LEVEL A)
interconnecting plug and chassis ground, using leads
NOTE
supplied with dc voltmeter.
Unless otherwise specified. verify the
(4) Adjust voltage standard for a 100-volt de output.
results of each test and take corrective
Dc voltmeter will indicate between 396 and 404 millivolts.
action whenever the test requirement is
5) Remove probe and adapter connected in (1)
not met before continuing with the
above.
calibration.
b. Adjustments. No adjustments can be made.
8. Gain Set
9. Drive Balance and Pulse Dc Level
a. Performance Check
(1) Connect pin 10 of interconnecting plug on TI to
a. Performance Check
chassis ground, using probe and adapter (B7 and B4).
(2) Connect voltage standard (A8) to TI EXT INPUT,
(1) Connect equipment as shown in figure 1.
using cable (B5).
(3) Connect dc voltmeter (A2) between pin I of TI
Figure 1. Calibration adapter - equipment setup.
(2) Position oscilloscope (A3) controls as listed in (a)
(3) Set TI TEST FUNCTION switch to + PULSE.
through (h) below:
(4) Adjust voltage standard (A8) for a 95-volt dc
(a) Both VOLTS/DIV switches to .1.
output.
(5) Adjust TI AMPLITUDE control for 2 centimeters
(b) Both POSITION controls to midrange.
(c) MODE switch to ALTER.
of vertical deflection on oscilloscope (A3) crt and adjust
both POSITION controls to superimpose CH1 and CH2
(d) INV (CHI) NORM switch to NORM.
signals. If signals cannot be adjusted for 2 divisions of
(e) Both AC/DC/GND switches to DC.
superimposed (equal) amplitude, disregarding overshoot
(f) Both VARIABLE controls to CALIB.
at leading and trailing edges, perform b (1) below.
(g) TIME/DIV switch to S ASEC.
(h) TIME VARIABLE control to CALIB.
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