TB 9-4931-503-24
DUAL TRACE AMPLIFIER, TEKTRONIX, TYPE 5A48
17. Preliminary Instructions
a. The instructions outlined in paragraphs 17 and 18 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
c. Unless otherwise specified, verify the result of each test and, whenever the test
requirement is not met take corrective action before continuing with the 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. Unless otherwise specified, all controls and control settings refer to the TI.
WARNING
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 set within the performance
check when applicable.
a. Remove TI protective covers as required to make adjustments.
b. Install TI into oscilloscope center compartment, and delaying time base into
horizontal (right) compartment.
c. Connect oscilloscope to a 115 V ac source and energize. Allow at least 20 minutes for
warm-up.
d. Position TI controls as listed in (1) through (6) below:
(1) DISPLAY ON pushbutton pressed.
(2) MODE CH 1 pushbutton pressed.
(3) TRIGGER CH 1 pushbutton pressed.
(4) CH 1 and CH 2 VOLTS/DIV CAL control fully cw (to detent).
(5) CH 1 and CH 2 POSITION controls to midrange.
(6) All remaining pushbuttons released (out).
e. Position delaying time base controls as listed in (1) through (8) below:
(1) POSITION control to midrange.
(2) MAIN SEC/DIV switch to 1 m.