TB 9-6625-2183-24
(8) Repeat technique of (4) through (6) above for CH1, except if err readout
indication is not within 3%, perform b (2) below.
b. Adjustments
(1) Set oscilloscope calibrator for a channel 2, 1 kHz, 30 mV VOLTAGE mode
output and adjust R137 (fig. 1) for exactly 6 divisions on TI.
(2) Set oscilloscope calibrator for a channel 1, 1 kHz, 30 mV VOLTAGE mode
output and adjust R117 (fig. 1) for exactly 6 divisions on TI.
11. Compensation
a. Performance Check
(1) Set VOLTS/DIV switches to 5m and SEC/DIV switch to 2 .
(2) Connect oscilloscope calibrator SOURCE/MEASURE CHAN 2 to TI CH2 input.
(3) Set oscilloscope calibrator for a channel 2, 100 kHz, 25 mV, EDGE mode output
and adjust amplitude for 5 divisions of vertical deflection on TI. If TI does not display
optimum square wave within 0.2 divisions, perform b below.
(4) Set SEC/DIV switch to .2 m, set oscilloscope calibrator to standby and insert
standardizer between termination and TI.
(5) Set oscilloscope calibrator output to 1 kHz and adjust output amplitude for 5
divisions of vertical deflection on TI.
(6) Adjust standardizer for optimum square wave response on TI.
(7) Set VOLTS/DIV switch to settings listed in table 5 and adjust oscilloscope
calibrator output amplitude for 5 divisions of display at each setting. If TI does not display
optimum square wave at each setting, perform appropriate adjustments listed in table 5.
Table 5. Compensation
Test
Adjustments
instrument
(fig. 1) (R)
VOLTS/DIV
CH1
CH2
switch
flat front
flat front
settings
top corner
top corner
5 m
C1
-
10 m
-
-
20 m
-
-
50 m
C5A C5B
C15A C15B
0.1 V
-
-
0.2 V
-
-
0.5 V1
C4A C4B
C14A C14B
1 V
-
-
2 V
-
-
5 V
-
-
10 V
-
-
1Remove
termination from equipment setup and use oscilloscope calibrator
VOLTAGE mode.
(8) Set oscilloscope calibrator output to standby.