TB 9-4931-321-35
(5) Adjust function/arbitrary generator frequency to obtain peak indication on TI
meter. If necessary, adjust function/arbitrary generator output amplitude to maintain on-
scale indication on TI meter. Function/arbitrary generator frequency display will indicate
980 Hz or less. Difference between this indication and indication recorded in (3) above will
be 70 Hz or more.
b. Adjustments. No adjustments can be made.
11. Bandwidth
a. Performance Check
(1) Adjust function/arbitrary generator frequency for 1000 Hz.
(2) Adjust FREQ control to obtain peak indication on TI meter.
(3) Adjust function/arbitrary generator output amplitude to obtain a 0 (zero) dB
indication on TI meter 0 (zero) to 2 dB scale.
(4) While maintaining function/arbitrary generator output amplitude constant,
2 dB scale. Record function/arbitrary generator frequency indication.
(5) While continuing to maintain function/arbitrary generator output amplitude
to 0 (zero) dB and again drops to 1.5 dB. The difference in this function/arbitrary generator
frequency indication and indication recorded in (4) above will be 130 Hz or more.
(6) Turn BANDWIDTH control fully counterclockwise and repeat (1) through
(4) above.
(7) Repeat technique of (5) above. The difference in frequencies will be 15 Hz
or less.
(8) Set INPUT (INPUT SELECTOR) switch to HIGH. Adjust function/arbitrary
generator output amplitude to obtain on-scale indication on TI meter.
(9) Adjust function/arbitrary generator frequency and FREQ control to obtain peak
indication on TI meter.
(10) Adjust function/arbitrary generator output amplitude to obtain a 1 dB indication
on TI meter 0 (zero) to 2 dB scale.
(11) Turn BANDWIDTH control fully clockwise. Adjust FREQ control to obtain
peak TI meter indication.
(12) If TI meter does not indicate between 0.5 and 1.5 dB on 0 (zero) to 2 dB scale
(between 0.9 and 1.1 dB), perform b below.
b. Adjustments
(1) Set function/arbitrary generator frequency to 1000 Hz.
(2) Adjust FREQ control to obtain peak indication on TI meter.
(3) Adjust function/arbitrary generator output amplitude to obtain 1 dB indication
on TI meter 0 (zero) to 2 dB scale.
(4) Turn BANDWIDTH control fully counterclockwise.
