TB 9-6625-2099-35
(31) Remove 50Ω feedthrough termination from oscilloscope calibrator CHAN 2 and
TI CH 2. Reconnect oscilloscope calibrator CHAN 2 to TI CH 2 using a 5-80 pF
standardizer. Rotate oscilloscope calibrator knob located below EDIT FIELD pushbutton
to obtain 6 divisions 6 divisions of vertical display.
(32) Adjust oscilloscope calibrator output for 6 divisions of display at each
corners and flat tops, perform appropriate adjustments listed in table 10.
(33) Remove 5-80 pF standardizer from oscilloscope calibrator CHAN 2 and TI CH 2.
Test instrument
CH 1 and CH 2 adjustments
VOLTS/DIV
switch settings
Square corners
Flat top
20
mV
C106
C107
50
mV
C110
C111
.1 mV
C114
C115
1
V
C118
C119
1Adjustments
for CH 1 and CH 2 are numbered the same.
b. Adjustments
(1) Ensure oscilloscope calibrator output and TI VOLTS/DIV switch setting is set
as indicated in first row of table 8.
(2) Adjust CH 1 GAIN (front panel) for 4 divisions of amplitude.
(3) Set CH 1 VOLTS/DIV switch to 10 mV and oscilloscope calibrator output for 50
mV.
(4) Adjust R1317 CH 1 2X GAIN (fig. 3) for 5 divisions of amplitude (R).
(5) Ensure oscilloscope calibrator output and TI VOLTS/DIV switch setting is set
as indicated in first row of table 9.
(6) Adjust CH 2 GAIN control (front panel) for 4 divisions of amplitude.
(7) Set CH 2 AC-GND-DC switch to AC.
(8) Adjust R2411 (fig. 3) polarity gain for minimum gain change while switching CH
2 POLARITY switch between +UP and INVERT.
(9) Set CH 2 AC-GND-DC switch to DC and repeat (6) through (8) above until no
further adjustments are needed.
(10) Set CH 2 AC-GND-DC switch DC and VOLTS/DIV switch to 10 mV.
(11) Set oscilloscope calibrator output controls for 50 mV at 1 kHz.
(12) Adjust R2317 CH 2 2X GAIN (fig. 3) for 5 divisions of amplitude (R).
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