PERFORMANCE TESTS
b. Program the UUT to SPCL 909, EXT øM, and 10 radians phase deviation.
c. Program the LFSSG for .3 kHz and .7071V RMS, as measured by the DVM.
d. Program the modulation analyzer to measure øM + peak in a 50-Hz to 15-kHz
bandwidth.
e. Verify that the modulation analyzer reading is between 9.5 and 10.5 radians.
f. Program the LFSSG for 10 kHz and 0.7071V RMS, as measured by the DVM.
g. Verify that the modulation analyzer reading is between 8.5 and 10.0 radians. (3
dB bandwidth, 15 kHz).
NOTE
It may be necessary to compensate for residual noise effects using the
procedure presented in the manual provided with the Modulation
Analyzer.
9. Incidental AM Test
a. Program the UUT for 100-kHz deviation, INT FM on at 1 kHz, EXT FM off, a
level of +7 dBm, and a frequency of 14 MHz.
b. Program the modulation analyzer to measure peak AM in a 0.3- to 3-kHz
bandwidth.
c. Verify that the incidental AM is less than 1%.
d. Repeat steps a through cat frequencies of 20, 30, 40, 60, 80, 100, 160, 250, 320,
400, 550, 640, 700, 850, 950, 1056 MHz.
10. Residual FM Test
a. Program the UUT for a frequency of 640 MHz and no modulation.
b. Program the HFSSG to 641.5 MHz and +1.0 dBm.
c. Connect the HFSSG output to the modulation analyzer external LO input
connector.
d. Program the modulation analyzer to measure average FM in the 50-Hz to
15-kHz band width.
e. Verify that the modulation analyzer reading is less than 8 Hz RMS.
f. Verify that the modulation analyzer reading is less than 8 Hz average at the
following UUT frequencies: 1024, 950, 850, 700, 640, 550, 400, 320, 160, 100,
80, 60, 40, 30, 20, 14.
Program the external LO to a frequency 1.5 MHz higher than the UUT
frequency in each case.
4-22
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