TB 9-6625-2329-35
(e) 15 kHz low pass filter.
(4) Initiate audio analyzer and set to measure percent distortion.
(5) Press pushbuttons as listed in (a) through (c) below:
(a) PARAMETER-RF, enter DATA 15 numerical value, and press
ENTER/UNITS MHz key.
(b) PARAMETER-LEVEL, enter DATA 0 numerical value, and press
ENTER/UNITS dBm key.
(c) PARAMETER-AF, enter DATA 1 numerical value, and press
ENTER/UNITS kHz key.
(6) Press TI PARAMETER-ΦM pushbutton, enter DATA numerical value, and
press ENTER/UNITS rad key for each row in table 20. Measuring receiver will indicate
within limits specified.
Table 20. PM Accuracy
Measuring receiver modulation indications
Test instrument
(rad)
DATA and
ENTER/UNITS
(rad)
Min
Max
20
18.9
21.1
10
9.4
10.6
3
2.75
3.25
1
0.85
1.15
.3
0.185
0.415
(7) Press PARAMETER-ΦM pushbutton and press ON/OFF-OFF key.
(8) Press pushbuttons and adjust controls as listed in (a) through (c) below for each
row in table 21 below:
(a) Press TI PARAMETER-RF pushbutton, enter DATA numerical value, and
press ENTER/UNITS MHz key.
(b) Press TI PARAMETER-ΦM pushbutton, enter DATA numerical value,
and press ENTER/UNITS rad key.
(c) Using measuring receiver and ΦM measurement techniques, modulation
will be between specified limits.
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