TB 9-6625-2240-24
NOTE
You may need to adjust A TRIGGER SLOPE LEVEL for a
stable display in step (8) below.
(7) Set oscilloscope calibrator output and TI to settings listed in table 7.
(8) Adjust horizontal POSITION control to align 1 marker per division. TI will
Table 7. Delay Time and Differential Measurement
Test
Oscilloscope
instrument
Test
Test instrument
Test
calibrator
TIME/DIV
indications
instrument
instrument
MARKER
VOLTS/DIV
switch settings
1 per division
adjustments
minor
output
switch
A
B
settings
divisions
.05 s
.05 s
b(2)
.5 V
5 ns
2
(9) Set A SOURCE switch to NORM, and A COUPLING switch to AC.
(10) Set X10 MAG pushbutton (out).
(11) Use technique of (12) and (13) below for TI TIME/DIV switch settings and
oscilloscope calibrator MARKER settings listed in table 8. Perform adjustments as needed
listed in table 8.
(12) Adjust horizontal POSITION control to align 1st time marker with 1st graticule line.
(13) Rotate oscilloscope calibrator knob located below EDIT FIELD pushbutton to
obtain 1 marker per division on TI. Oscilloscope calibrator err display will indicate within
limits specified in table 8.
b. Adjustments
(1) Set oscilloscope calibrator MARKER output to .1 ms. Press oscilloscope
calibrator OPR/STBY pushbutton for OPR indication on oscilloscope calibrator display and
adjust R1155 (fig. 3) for 1 marker per division (R).
NOTE
Interaction exists between C1233, C1253, and C1179 (fig. 3).
Adjust for best in-tolerance condition.
(2) Adjust C1233 and C1253 (fig. 3) in equal amounts until TI displays 1 marker per
division (R).
(3) Set oscilloscope calibrator MARKER output to 20 ns. Adjust C1179 (fig. 3) for 1
marker per division (R).