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a. Reset the instrument.
b. Set the output frequency to 1 kHz.
c. Set the output amplitude to 1.4 V.
d. Set the measurement mode to distortion.
3. On the signal generator:
a. Set the output frequency to 840 MHz.
b. Set the output amplitude to 0.0 dBm.
c. Set the function to FM with EXT AC Modulation.
d. Set the MOD LEVEL to 5 kHz.
4. On the Test Set:
a. Press
.
Preset
b. Select the INSTRUMENT CONFIGURE screen.
c. Set the RF Display field to Freq.
d. Select the RF ANALYZER screen.
e. Set the Tune Freq to 840 MHz.
f. Set the Input Port field to Ant.
g. Set the IF Filter field to 230 kHz.
h. Set Squelch field to Open.
i. Select the AF ANALYZER screen.
j. Set the AF Anl In field to FM Demod.
k. Set the Filter 1 field to 300Hz HPF.
l. Set the Filter 2 field to 3kHz LPF.
m. Set the Detector field to Pk+.
5. For each FM deviation setting shown in the Performance Test Record (PTR) do
the following:
a. Adjust the audio analyzer's level until the measuring receiver reads the FM
deviation shown in the PTR.
b. Read the distortion on the audio analyzer and compare the results to the
limits shown in the PTR.
RF Analyzer FM Distortion Performance Test 21
Performance Tests
183
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