TB 9-6625-967-35
straight line, perform b(2) below.
b. Adjustments
(1) Adjust 10 MV GAIN R249 (fig. 1) until oscilloscope displays a straight line.
(2) Adjust 20 MV GAIN R247 (fig. 1) until oscilloscope displays a straight line (R).
20. VARIABLE VOLTS/DIV Control
a. Performance Check
(1) Set TI CH1 and CH2 VOLTS/DIV switches to .01 and MODE switch to CH1.
(2) Turn TI INV (CH1) NORM switch to NORM.
(4) Turn TI CH1 VARIABLE VOLTS/DIV control fully counterclockwise. Vertical
display on oscilloscope (A5) crt will be less than 2 major divisions, and CH1 UNCAL
indicator will glow.
(5) Turn TI MODE switch to CH2 and repeat technique of (4) above.
b. Adjustments. No adjustments can be made.
21. Alternate Mode
a. Performance Check
(1) Turn TI CH1 and CH2 variable VOLTS/DIV controls to CALIB.
(2) Turn TI MODE switch to ALTER.
(3) Adjust TI CH1 and CH2 POSITION controls for two sweeps, two divisions apart.
(4) Adjust time base plug-in (A8) controls for 0.1 second/division sweep rate on
oscilloscope (A5) crt. Horizontal display will alternate between CH1 and CH2 traces.
b. Adjustments. No adjustments can be made.
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