TB 9-6625-2343-40
(34) TI will indicate within limits specified in first row of table 5. If not, perform b below.
(35) Repeat technique of (33) above for remaining calibrator frequencies listed in
table 5. If TI indications are not within limits specified, perform b below.
Table 5. AM Accuracy
Calibrator
Test instrument
Indication (%)
output
Min
Max
50 kHz
98.9
101.1
100 kHz
96.9
103.1
50 Hz
98.9
101.1
20 Hz
96.9
103.1
(36) Press TI 3.1, SPCL keys.
(37) Change calibrator output frequency to 50 Hz.
(38) TI will indicate within limits specified in first row of table 6. If not, perform b below.
(39) Repeat technique of (37) above for remaining calibrator frequencies listed in
table 6. If TI indications are not within limits specified, perform b below.
Table 6. AM Accuracy (IF 455 kHz)
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.
