TB 9-6625-2132-24
CALIBRATION PROCESS FOR DIFFERENTIAL AMPLIFIER
TEKTRONIX, TYPE 7A13
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 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.
7. 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. Remove side covers from TI as required to make adjustments.
b. Install TI into oscilloscope left vertical compartment, using extender. Install time
base into horizontal compartment.
c. Position controls as listed in (1) through (11) below:
(1) + and - polarity pushbuttons out.
(2) VOLTS/DIV switch to 10 mV and VOLTS/DIV VARIABLE control to CAL (detent).
(3) +INPUT and -INPUT pushbuttons to GND.
(4) VOLTS counter set to 0.000 (cw 0.000 for TI's with electrical counter).
(5) PULL VOLTS/DIV VAR FOR X10 Vc control pushed in.
(6) VAR BAL control to midrange.
(7) BW pushbutton to 5 MHz.
(8) POSITION control to midrange.
(9) X10 BAL control to midrange.
(10) STEP ATTEN BAL control to midrange.
(11) SW 10 switch (fig. 1) fully ccw (R in = 1 M ).