TB 9-6625-2343-50
Calibrator
Test instrument
Indication (%)
output
Min
Max
50 Hz
97.9
102.1
10 kHz
97.9
102.1
20 Hz
96.9
103.1
(40) Press TI keys as listed in (a) through (c) below:
(a) DISPLAY RATIO.
(b) HP FILTER 50 Hz.
(c) LP FILTER 3 kHz.
(41) Set calibrator for a wideband output of 1 kHz at an amplitude of 241 mV.
(42) Adjust calibrator output amplitude for a TI indication of 50% AM.
(43) Press TI MEASUREMENT FM key.
(44) Disconnect calibrator from AM/FM test source AUDIO INPUT.
(45) Record the residual FM displayed on TI.
(46) Reconnect calibrator to AM/FM test source AUDIO INPUT.
(47) Subtract one-half of the value recorded in step (45) above from the TI displayed
value. If the result is not ≤ 20 Hz pk, perform b below.
(48) Press TI 3.0, SPCL keys.
(49) Press TI MEASUREMENT FM key.
(50) Disconnect calibrator from AM/FM test source AUDIO INPUT.
(51) Record the residual FM displayed on TI.
(52) Reconnect calibrator to AM/FM test source AUDIO INPUT.
(53) Subtract one-half of the value recorded in step (51) above from the TI displayed
value. If the result is not ≤ 20 Hz pk, perform b below.
(54) Press TI MEASUREMENT ΦM key.
(55) Disconnect calibrator from AM/FM test source AUDIO INPUT.
(56) Record the residual ΦM displayed on TI.
(57) Reconnect calibrator to AM/FM test source AUDIO INPUT.
(58) Subtract one-half of the value recorded in step (56) above from the TI displayed
value. If the result is not ≤ 0.030 rad pk, perform b below.
(59) Press TI keys as listed in (a) and (b) below:
(a) BLUE.
(b) INSTR PRESET.
(60) Reduce all outputs to minimum and disconnect equipment setup.
b. Adjustments
(1) Disconnect equipment setup.
(2) Press TI keys as listed in (a) through (f) below:
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