HP 8590 E-Series, Calibration Manual

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57. Non-Harmonic Spurious Outputs , HP 8593EM ,
HP 8594EM , HP 8595EM , HP 8596EM Option 010
15. V erify that the marked signal is a true response and not a random noise
peak by pressing SINGLE to trigger a new sweep and press PEAK SEARCH.
A true response will remain at the same frequency and amplitude on
successive sweeps but a noise peak will not.
If the marked signal is not the fundamental or a harmonic of the
fundamental (see step 14) and is a true response (see step 15), proceed with
step 17.
16. If the marked signal is either the fundamental or a harmonic of the
fundamental (see step 14) or a noise peak (see step 15), move the marker to
the next highest signal by pressing SHIFT , PEAK SEARCH. Repeat step 14.
The following step is only performed if the marker signal is not the
fundamental or harmonic of the fundamental and is a true response .
17. Calculate the dierence between the amplitude of marked signal and the
Fundamental Amplitude as listed in T able 2-74 .
F or example , if the Fundamental Amplitude for a fundamental frequency of
9 kHz is +1.2 dBm and the marker amplitude is 030.8 dBm, the dierence
is 032 dBc .
Record this dierence as the Non-Harmonic Response Amplitude for the
appropriate EMC analyzer center frequency and microwave spectrum
analyzer start and stop frequency settings in T able 2-75.
Non-Harmonic Amplitude = Marker Amplitude 0 Fundamental
Amplitude
18. If a true non-harmonic spurious response is not found, record \NOISE" as
the Non-Harmonic Response Amplitude in T able 2-75 for the appropriate
EMC analyzer center frequency and microwave spectrum analyzer start and
stop frequency settings .
19. Repeat steps 14 through 18 for the remaining microwave spectrum analyzer
settings for start frequency , stop frequency , and resolution bandwidth; and
for the EMC analyzer center frequency setting of 9 kHz.
20. Repeat steps 12 through 18 with the EMC analyzer center frequency set to
1.5 GHz.
21. Repeat steps 12 through 18 with the EMC analyzer center frequency set to
2.9 GHz.
22. Locate in T able 2-75 the most-positive Non-Harmonic Response Amplitude
for the microwave spectrum analyzer STOP frequency settings of less than
P erformance V erication T ests 2-365