TB 9-6625-2099-35
(2) Connect oscilloscope calibrator CHAN 1 to TI CH 1 using a 50Ω feedthrough
termination. Set oscilloscope output to CHAN 1 using technique in (11) above.
(3) Set DISPLAY MODE switch to CH 1 and CH 1 VOLTS/DIV switch to 10 mV.
(4) Set oscilloscope calibrator to VOLTAGE, and output to 60 mV at 1 kHz.
(5) Adjust CH 1 POSITION, oscilloscope, and time base controls as necessary to
view waveform.
(6) Rotate oscilloscope calibrator knob located below EDIT FIELD pushbutton to
obtain 6 divisions on oscilloscope display. If aberrations are not less than 0.24 divisions
peak-to-peak, adjust R245, C245, and C275 (CH 2 adjust R445, C445, and C375) (fig. 1 or
2) for optimum square wave with aberrations of less than 0.24 divisions peak-to-peak (R).
(7) Repeat technique of (2) through (6) above for CH 2.
10. Final Procedure
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA Label/Form in accordance with TB 750-25.
AM1-6785/U (TEKTRONIX, TYPE 7A26)
11. Preliminary Instructions
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 results 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. Addition
maintenance information is contained in the manufacturers manuals for this TI.
d. Unless otherwise specified, all controls and control settings refer to the TI.
12. 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 set within the performance
check when applicable.
10 CHANGE 3
