TB 9-6625-2343-50
(54) Subtract one half of the residual AM2 indication recorded in (52) above from TI
displayed indication. If result is not ≤ 0.2%, perform b below.
(55) Press TI keys as listed in (a) through (c) below:
(a) MEASUREMENT FM.
(b) HP FILTER (all off).
(c) LP FILTER >20 kHz.
(56) Set calibrator output frequency to 1 kHz at an output amplitude of 400 mV.
(57) Adjust calibrator output for a TI indication of the product of the following:
(10 kHz peak deviation multiplied by the 40 kHz ref value recorded in (9) above).
(58) Press calibrator NEW REF key.
(59) Change calibrator output frequency to 10 kHz.
(60) If TI does not indicate within limits specified in first row of table 8, perform b below.
(61) Repeat technique of (59) above for remaining calibrator frequency listed in table 8.
If TI indications are not within limits specified, perform b below.
Test instrument
Calibrator
indications
frequency
(kHz)
Output
Min
Max
10 kHz
9.79
10.21
20 Hz
9.79
10.21
(62) Change calibrator output frequency to 10 kHz at an amplitude of 400 mV.
(63) Adjust calibrator output for a TI indication of 10 kHz peak deviation.
(64) Set audio analyzer for a DISTORTION measurement with 30 kHz low pass
filter activated.
(65) If audio analyzer does not indicate ≤ 0.1%, perform b below.
(66) Reduce all outputs to minimum and disconnect equipment setup.
b. Adjustments
(1) Disconnect equipment setup.
SAMPLER
SAMPLER
EFFICIENCY
OFFSET
ADJUSTMENT
19