TB 9-6625-2343-50
(11) Repeat technique of step (8) above, changing only the calibrator output
frequency to frequencies listed in table 13. If TI does not indicate within limits specified in
Calibrator
Test instrument
Indications
Output
(mV rms)
frequency
Min
Max
40 kHz
96.0
104.0
5 kHz
96.0
104.0
500 Hz
96.0
104.0
50 Hz
96.0
104.0
(12) Change calibrator output to a frequency of 380 Hz at a level of 100 mV.
(13) Press TI keys as listed in (a) through (d) below:
MEASUREMENT S (shift).
(a)
(b)
AUDIO DISTN.
(c)
BLUE.
(d)
400 Hz DISTN.
(14) Slowly step the calibrator output frequency up to 420 Hz in 2 Hz steps while
observing the TI distortion indications at each step. If TI indication is not ≤ 0.3%, perform
b below.
(15) Change calibrator output level to 3 V.
(16) Slowly step the calibrator output frequency down to 380 Hz in 2 Hz steps while
observing the TI distortion indications at each step. If TI indication is not ≤ 0.3%, perform b below.
(17) Press TI keys as listed in (a) and (b) below:
(a) BLUE.
(b) 1 kHz DISTN.
(18) Set calibrator output to a frequency of 950 Hz at a level of 3 V.
(19) Slowly step the calibrator output frequency up to 1050 Hz in 5 Hz steps while
observing the TI distortion indications at each step. If TI indication is not ≤ 0.3%, perform b below.
(20) Change calibrator output level to 100 mV.
(21) Slowly step the calibrator output frequency down to 950 Hz in 5 Hz steps while
observing the TI distortion indications at each step. If TI indication is not ≤ 0.3%, perform b below.
(22) Press audio analyzer OUTPUT, FLOAT key.
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