Quantcast Figure 4-5. AN/PRR-9(XE-9) audio distortion test.

 

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Figure 4-4. AN/PRR-9(XE-9) audio frequency response test.
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TM-11-5820-549-50-1 Receiving Set Radio AN PRR-9 Radio AN PRR-9 (XE-9) Manual
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Figure 4-8. AN/PRR-S(XE-9) if. selectivity test.
TM 11-5820-549-50-1
Figure 4-5. AN/PRR-9(XE-9) audio distortion test.
b. Set the PP-3514/U for 3.2 +0.1 volts input to the
receiver.
c. Set the AN/URM-103 for receiver channel
frequency. Read frequency on AN/USM-207.
d. Adjust receiver volume control for squelch "off"
operation.
e. Adjust output of AN/URM-103 for an indication
on the ME-30A/U of 4.8 millivolts at TP2 (fig. 2-2).
f. increase the output signal level of the AN/ URM-
103 by 6 db.
g. Tune the AN/URM-103 on each side of the
channel frequency until the ME-30A/U again reads 4.8
mv. Note and record the frequencies, as indicated on
the AN/USM-207, at which the ME-30A/U reads 4.8 mv.
h. The spread between the two frequencies
recorded in step g shall be 40 kHz + 10 kHz.
Figure 4-6. AN/PRR-9(XE-9) dc power consumption
test.
i. Increase the output signal level of the AN/ URM-
103 by an additional 54 db.
j. Repeat step g.
k. The spread between the two frequencies
recorded in step j shall be no more than 72.0 kHz.
4-14. AN/PRR-9(XE-9) Discriminator Characteristics
Test
For this test the receiver electronic unit assembly must
be removed from the receiver case.
a. Connect the test equipment as shown in figure
b. Set the PP-3514/U for 3.2 +0.1 volts input to the
receiver.
Figure 4-7. AN/PRR-9(XE-P) oscillator tests.
c. Set the AN/GRM-50 for 455 kHz as indicated on
the AN/USM-207.
4-5

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