TB 9-6625-2132-24
CALIBRATION PROCESS FOR DIFFERENTIAL AMPLIFIER
TEKTRONIX, TYPE 7A22
13. 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 the calibration.
Adjustments required to calibrate the TI are included in the 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.
NOTE
Side covers must remain in place on TI during calibration.
Remove only as required to make adjustments and reinstall to
calibrate.
14. Equipment Setup
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 step within the
performance check where applicable.
a. Install TI into oscilloscope left vertical compartment, using extender. Install time base in
horizontal compartment.
b. Position TI controls as listed in (1) through (7) below:
(1) VOLTS/DIV switch to 1 mV and VARIABLE control to CAL IN.
(2) POSITION control to midrange.
(3) HF-3dB POINT switch to 1 MHz.
(4) LF-3dB POINT switch to 1 Hz.
(5) +AC-GND-DC pushbutton to DC and -AC-GND-DC pushbutton to GND.
(6) STEP ATTEN DC BAL control to midrange.
(7) OFFSET COARSE and FINE controls to midrange.
c. Position time base controls as listed in (1) through (7) below: