TB 9-6625-2343-40
(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.
(24) Set audio analyzer source output to 1 kHz at a level of 3 V.
(25) Set calibrator output for a frequency of 2 kHz at a level of -57 dBm.
29