(2)
Set the MODULATION selector to 20KC
(1) Place the MODULATION selector in the
and the DEV MULT switch to X10, rotate the
1000 - position.
DEVIATION control fully counterclockwise.
(2) Place the DEV MULT switch in the X5
(3) Connect the signal generator to the input
position.
of the panoramic indicator and obtain an
(8) Adjust the DEVIATION control until the
indication of the carrier on the screen.
KILOCYCLES
DEVIATION
meter
Use Panoramic Indicator IP-173/U or its
indicates 75 kc.
equivalent.
(4) Place the FREQ. RANGE-MC switch in
(4) Rotate the DEVIATION control until the
the -100 me position.
carrier goes through the second null.
(5) Adjust the TUNING control until the
(5) The KILOCYCLES DEVIATION meter
FREQO IN MEGACYCLES dial indicates
should indicate 110 kc +25 percent.
50 me.
c. Adjust Radio Receiver R-274/URR for fm
94. Rf Distortion Test
reception and tune it to 50 me. The radio receiver acts
a Connect Radio Receiver R-274/URR to the R.
as a detector in this test.
F.
OUTPUT jack of Signal Generator SG8/U.
Spectrum Analyzer TS-723/U is connected to the audio
Analyzer TS-728/U.
The total harmonic distortion
output of the radio receiver (fig. 40).
indicated by the spectrum analyzer should not exceed .5
percent.
65
