TB 9-6625-2329-35
(12) Using measuring receiver, ensure both 50 Hz high-pass filter and 15 kHz low-
pass filter are on.
(13) Press PARAMETERLEVEL pushbutton and press ON/OFF-ON key.
(14) Press pushbuttons on audio analyzer as listed in (a) through (e) below:
Source FREQ-300 Hz.
(a)
Source LEVEL-1 V.
(b)
Source-600Ω (SPCL 77).
(c)
Analyzer LEVEL-dB.
(d
(e)
Analyzer RATIO.
(15) Set up audio analyzer source frequency for each row in table 23. Audio analyzer
will indicate within limits specified.
Audio analyzer
Audio analyzer
indications
source
(dB)
(Hz)
Min
Max
500
-1
+1
1000
-1
+1
2000
-1
+1
5000
-1
+1
(16) Press PARAMETERLEVEL pushbutton and press ON/OFF-OFF key.
(17) Reduce output on audio analyzer.
b. Adjustments. No adjustments can be made.
15. Frequency Modulation
a. Performance Check
(1) Press SHIFT-INSTR PRESET pushbutton.
(2) Press pushbuttons on measuring receiver as listed in (a) through (e) below:
SHIFT-INSTR PRESET.
(a)
(b)
FM.
(c)
PEAK +.
(d)
50 Hz high pass filter.
(e)
15 kHz low pass filter.
(3) Initiate audio analyzer and set to measure percent distortion.
(4) Press pushbuttons as listed in (a) through (c) below:
(a) PARAMETER-RF, enter DATA 100 numerical value, and press
ENTER/UNITS MHz key.
(b) PARAMETER-LEVEL, enter DATA 0 numerical value, and press
ENTER/UNITS dBm key.
