634 Keysight N9915-90020 User’s Guide
AM/FM Metrics (SA Only and Option 355)
Using AM/FM Metrics
s
— Connect a test tone to the FieldFox SA Port 2 (Port 2)
—Press Measure
> Analog Demod Tune & Listen > Analog Demod
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 AF Res BW to better iden side bands. Le Chapter 9,
“SA (Spectrum Analyzer) Mode (Option 233–Mixed Analyzers)FUTURE”
and
“AF RBW (Audio-Frequency Resolution BW)” on page 188.
—Optionally, Freq/Dist
> Tune & Listen OFF. Tune & Listen can be set when
you are in Analog Demodulation mode, so you can enable Tune & Listen
sweeps in between your Analog Demod sweeps
Metrics are displayed in the AM/FM Modulation Metrics table on the
FieldFox. For AM and FM Metrics examples, refer to
Figure 27-1 through
Figure 27-8 on page 643.
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 27-1 on
page 632
.
Chapter 9, “SA (Spectrum Analyzer) Mode (Option 233–Mixed
Analyzers)FUTURE”
and to “Analog Demod” on page 174.
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