TB 9-4931-503-24
(3) Adjust DELAY TIME MULT dial to 1.00 and adjust R530 DLY STRT (fig. 2)
until intensified portion of trace starts on 2d vertical graticule line (R).
(4) Adjust DELAY TIME MULT dial to 9.00 and adjust R522 DLY STP (fig. 2)
until intensified portion of trace starts on the 10th vertical graticule line (R).
(5) Press DISPLAY MODE DLY'D SWP pushbutton. Adjust R530 DLY STRT and
R522 DLY STP (fig. 2) equally until time marker is just visible at start of trace.
(6) Press DISPLAY MODE INTENS SWP pushbutton and repeat (3) through (5)
above, as necessary, for best compromise.
11. Final Procedure
a. Deenergize and disconnect all equipment. Replace protective covers and cabinet panels.
b. Annotate and affix DA label/form in accordance with TB 750-25.
CALIBRATION PROCESS FOR
TIME BASE, TEKTRONIX, TYPE 5B40
12. Preliminary Instructions
a. The instructions outlined in paragraphs 12 and 13 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 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. 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.
13. 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.
a. Remove TI protective covers and oscilloscope cabinet panels.
b. Install TI in oscilloscope right compartment.
c. Connect dual trace amplifier to oscilloscope left compartment using extender.