TB 9-6625-2000-35
Internal Square Wave
a. Performance Check
(1) Connect TI RF OUTPUT to crystal detector input then connect crystal detector
output to oscilloscope channel 1.
(2) Set FREQUENCY GHz to 7.0 GHz.
(3) Adjust ATTENUATOR control for a reading of 0 dBm on the attenuator dial.
(4) Press MODULATION SELECTOR switch to INT SQ WAVE.
(5) Configure oscilloscope for a square wave display.
(6) Rotate INT SQ WAVE control throughout its range. Waveform as displayed on
oscilloscope will be a symmetrical square wave and variable from 950 Hz, or less, to 1050 Hz,
or greater.
b. Adjustments. No adjustments can be made.
11. Repetition Rate (Model 1020A-Y Modulator)
a. Performance Check
(1) Connect frequency counter to TI
OUT.
CAUTION
Output from TI may be 40 V.
(2) Position TI controls as listed in (a) through (c) below:
(a) FUNCTION switch to EXT
.
/INT
(b) RATE control fully cw and X1-X10-X1000 switch to X100.
(c) SELECTOR switch to INT.
(3) Adjust frequency counter to indicate frequency.
If frequency counter does not
indicate 10 kHz or more, perform b (1) below.
(4) Turn RATE control fully ccw. If frequency counter does not indicate 1000 Hz or
less, perform b(2) below.
(5) Set RATE X1-X10-X100 control to X10. If frequency counter does not indicate 100
Hz or less, perform b (2) below.
(6) Set RATE X1-X10-X100 control to X1. If frequency counter does not indicate 10 Hz
or less, perform b (2) below.
b. Adjustments
(1) Adjust R6 (fig. 2) until frequency counter indicates 10 kHz (R).
(2) If required, readjust R6 for best in-tolerance condition while performing a (2)
through (6) above.
