TB 9-6625-967-35
SECTION III
PRELIMINARY OPERATIONS
6. Preliminary Instructions
a. The
instructions outlined in this
section are preparatory to the
calibration process.
Personnel should become familiar with the entire bulletin before beginning the calibration.
b. Items of equipment used in this procedure are referenced within the text by common
name and item identification number as listed in tables 2 and 3. For the identification of
equipment referenced by item numbers prefixed with A, see table 2, and for prefix B. see
WARNING
HIGH VOLTAGE is used during the performance of this
calibration. DEATH ON CONTACT may result if personnel
fail to observe safety precautions.
7. Equipment Setup
a. Install time
base plug-in (A8) in
horizontal compartment of
oscilloscope (A5)
b. Install TI in
vertical compartment of
oscilloscope and
remove oscilloscope top cover.
c. Position TI controls as listed in (1) through (7) below:
(1) CH1 and CH2 POSITION controls to midrange
(2) CHI and CH2 VOLTS/DIV switches to .01.
(3) CH1 and CH2 VARIABLE VOLTS/DIV (red knob) controls to CALIB.
(4) CH1 and CH2 AC-DC-GND switches to GND.
(5) MODE switch to CH1.
(6) INV(CH1) NORM switch to NORM.
(7) TRIGGER (CHI ONLY PULL) switch pushed in.
d. Energize equipment and allow at least 30 minutes for warm-up.
e. Turn CH1 VARIABLE VOLTS/DIV control throughout its range. If trace moves
vertically, adjust CH1 DC BAL control (front panel) for no movement of trace.
f. Turn MODE switch to CH2 and repeat e above.
g. Turn TI MODE switch to CH1.
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