TB 9-6625-1982-24
(3) Verify that the difference indication on the frequency difference meter is within
130 PPM ((OPT 01) is within 6.5 PPM).
(4) If within tolerance disconnect connections made in a.(1) and a.(2) above. and
proceed to next paragraph. If out of tolerance perform b below.
b. Adjustments
(1) Adjust standard time base adjustment C201 (fig. 1) to obtain minimum
difference indication on frequency difference meter within 1 part in 10-7 ((OPT1) 5 parts in
10-9).
(2) Allow oscillator time to settle (at least 1 hour) after making adjustment and
verify it has not drifted. If needed, repeat b (1) above.
(3) Disconnect connections made in a (1) and a (2) above.
(4)
No further time base adjustments can be made.
9. Frequency and Sensitivity
a. Equipment Setup. Position TI controls as listed in (1) through (4) below:
(1) Set INT/EXT switch to INT.
(2) All buttons to out position.
(3) Trigger level to mid point (0).
(4) Set DISPLAY TIME MEASUREMENT INTERVAL switch for best display.
b. Performance Check
(1) Connect function/arbitrary generator OUTPUT to TI INPUT, using cable and
termination (if needed).