TB 9-6625-2102-35
Oscilloscope indications
(DC V)
Min
Max
- 0.010
+ 0.010
b. Adjustments
(1) Adjust R46 and R30 (fig.1) for optimum ramps.
(2) Repeat a (3) and b (l) above for optimum ramps.
(3) Adjust R81 (fig.1) until the negative peaks coincide with horizontal centerline on
oscilloscope.
12. Main Generator Symmetry
a. Performance Check
(1) Connect TI FUNCTION OUT (50 Ω) to oscilloscope Vertical 1 input.
(2) Position main generator controls as listed in (a) through (f) below:
(a) FREQ/MULT (Hz) switch to 100K and VERNIER control fully cw to CAL.
(b) SYMMETRY control to OFF (ccw to detent).
(c) DC OFFSET control to OFF (ccw to detent).
(d) FUNCTION switch to SQUARE WAVE and TRIG START/STOP control
to 0 degrees CAL (detent).
(e) ATTENUATION (DB) switch to 20/0 and AMPLITUDE control fully ccw.
(f) Frequency dial to 2.0.
(3) Initiate oscilloscope Vertical 1 with 50 Ω Input and set to measure one duty
cycle.
(4) If oscilloscope does not indicate within duty cycle limits in table 12,
perform b (1) below.
Oscilloscope duty cycle
indications
(%)
Min
Max
49.5
50.5
(5) Adjust frequency dial to .02.
(6) Adjust main generator FREQ MULT (Hz) VERNIER control for an oscilloscope
frequency measurement of 400 Hz.
(7) If oscilloscope does not indicate within duty cycle limits in table 13, perform
b (2) below.
10 CHANGE 1
