TB 9-6625-2024-35
(2) Adjust R245 X10 GAIN (fig. 3) for oscilloscope indication of 5 divisions of
vertical deflection (R).
17. Attenuator Compensation
a. Performance Check
(1) Set VOLTS-TS/DIV switch to 5 mV.
(2) Connect oscilloscope calibrator SOURCE/MEASURE CHAN 1 to TI INPUT,
using standardizer.
(3) Set oscilloscope calibrator MARKER output to 1 ms and rotate oscilloscope
calibrator knob located below EDIT FIELD pushbutton for 6 divisions of display on
oscilloscope .
(4) Set dual time base TIME/DIV OR DLY TIME switches to .2 ms.
(5) Adjust standardizer for optimum square wave display on oscilloscope. If
standardizer has insufficient range, then it will be necessary to remove TI from
mainframe to adjust C100 (fig. 3) to midrange, reinstall TI, then readjust standardizer
for optimum square wave (R).
(6) Set VOLTS/DIV switch to positions listed in table 6 and repeat technique of
(3) above. If oscilloscope does not display an optimum square wave at each switch
position, perform the appropriate adjustment listed in table 6.
Test instrument
VOLTS/DIV
Adjustments
switch
(fig. 3) (R)
settings
Square corner
Flattop
10
mV
C106
C107
20
mV
C110
C111
50
mV
C114
C115
0.5 V1
C118
C119
1Adjust
for square wave on + (positive) portion of square wave only.
b. Adjustments. No further adjustments can be made.
18. Risetime
a. Performance Check
(1) Set VOLTS/DIV switch to 50 mV.
(2) Connect oscilloscope calibrator SOURCE/MEASURE CHAN 1 to TI INPUT.
(3) Set oscilloscope calibrator EDGE output to 1 s and rotate oscilloscope
calibrator knob located below EDIT FIELD pushbutton for a convenient display on
oscilloscope.
(4) Adjust dual time base controls as listed in (a) through (c) below:
