TB 9-6625-2240-24
CALIBRATION PROCESS
6. Preliminary Instructions
a. The instructions outlined in paragraphs 6 and 7 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 as listed in table 2.
c. Unless otherwise specified, verify the result of each test and, whenever the test
requirement is not met, take corrective action before continuing with this calibration.
Adjustments required to calibrate the TI are included in this procedure. Additional
maintenance information is contained in the manufacturer's manual for this TI.
d. When indications specified in paragraphs 8 through 12 are not within tolerance,
perform the power supply check prior to making adjustments. After adjustments are made,
repeat paragraphs 8 through 12. Do not perform power supply check if all other
parameters are within tolerance.
e. Unless otherwise specified, all controls and control settings refer to the TI.
7. Equipment Setup
HIGH VOLTAGE is used or exposed during the performance of
this calibration.
DEATH ON CONTACT may result if
personnel fail to observe safety precautions.
REDUCE
OUTPUT(S) to minimum after each step within the
performance check where applicable.
a. Remove TI protective cover as required for adjustment.
b. Position CH1 and CH2 controls as listed in (1) through (7) below:
(1) FOCUS, vertical POSITION, and SCALE ILLUM controls to midrange.
(2) VOLTS/DIV switches to 5 m (10 m for Tektronix, Type 475A) and VAR controls
fully cw (detent).
(3) Press VERT MODE CH1 pushbutton (in).
(4) AC-GND-DC switches to GND.
(5) INTENSITY control fully ccw.
(6) Set INVERT pushbutton (out).
(7) 20 MHz BW/TRIG VIEW pushbutton pressed in and released to full
c. Position A and B triggering controls as listed in (1) through (7) below:
(1) A TRIGGER LEVEL control to 0 and SLOPE switch to + (positive).
