360 Keysight N9927-90001 User’s Guide
AM/FM Metrics (SA Only and Option 355)
Using AM/FM Metrics
How to Set Up AM/FM Metrics
— Connect a test tone to the FieldFox SA Port 2 (Port 2)
—Press Measure
—Then Analog Demod / Tune & Listen
— Then choose one of the following:
— AM Metrics
or
— FM Metrics
Left display - Frequency Spectrum (Power vs. Frequency)
Right display - Demodulated waveform vs. time where Demod SwpT
sets
the width of the demod window.
—Then Freq/Dist
> Center to set the carrier frequency.
—Set Freq Span
so that all sidebands above -60 dB are displayed in the left
window.
— Optionally, adjust the Res BW
to better identify side bands.
Metrics are displayed in the AM/FM Modulation Metrics table on the
FieldFox. For AM and FM Metrics examples, refer to Figure 21-1 through
Figure 21-8 on page 369.
Selecting FM Wide vs. FM Narrow does not effect the displayed waveforms
or metrics. But, if you are using the Audio Demod feature and listening to the
demodulated waveform, then select the appropriate FM type, because the
tones do differ based on the FM type selected. Refer to Table 21-1 on
page 358.
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