56. Non-Harmonic Spurious Outputs, HP 8591EM Option 010

18.If the marked signal is either the fundamental or a harmonic of the fundamental (see step 16) or a noise peak (see step 17), move the marker to the next highest signal by pressing SHIFT, PEAK SEARCH. Repeat step 16.

The following step is only performed if the marker signal is not the fundamental or harmonic of the fundamental and is a true response.

19.Calculate the di￿erence between the amplitude of marked signal and the Fundamental Amplitude as listed in Table 2-72.

For example, if the Fundamental Amplitude for a fundamental frequency of 10 MHz is +1.2 dBm and the marker amplitude is 040.8 dBm, the di￿erence is 042 dBc.

Record this di￿erence as the Non-Harmonic Response Amplitude for the appropriate EMC analyzer center frequency and microwave spectrum analyzer start and stop frequency settings in Table 2-73.

Non-Harmonic Amplitude = Marker Amplitude 0 Fundamental Amplitude

20.If a true non-harmonic spurious response is not found, record \NOISE" as the Non-Harmonic Response Amplitude in Table 2-73 for the appropriate EMC analyzer center frequency and microwave spectrum analyzer start and stop frequency settings.

21.Repeat steps 15 through 20 for the remaining microwave spectrum analyzer settings for start frequency, stop frequency, and resolution bandwidth; and for the EMC analyzer center frequency setting of 10 MHz.

22.Repeat steps 14 through 21 with the EMC analyzer center frequency set to 900 MHz.

23.Repeat steps 14 through 21 with the EMC analyzer center frequency set to 1.8 GHz.

24.Locate in Table 2-73 the most-positive Non-Harmonic Response Amplitude. Record this amplitude as the Highest Non-Harmonic Response Amplitude in TR Entry 1 of the performance veri￿cation test record.

2-358 Performance Veri￿cation Tests