Keysight Technologies FieldFox A Series, Руководство пользователя

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512 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 25-1 through
Figure 25-8 on page 521 .
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 select
ed. Refer to Table 25-1 on
page 510 .