Keysight N9927-90001 User’s Guide 161
SA (Spectrum Analyzer) Mode
SA Mode Settings
—OffsetReversal Determines whether Receiver Freq is added to or
subtracted from the Offset Freq.
——OFF
SourceFreq = Offset + RecFreq. Use to measure
Upconverters.
——ON
SourceFreq = Offset - RecFreq. Use to measure
Downconverters. The source sweeps in Reverse direction.
Note: The Offset Freq. MUST be larger than the Receiver Stop
Freq.
Tune & Listen (AM/FM)
The Tune & Listen feature can be used to identify an interfering AM or FM
signal.
The demodulated AM or FM signal can be heard through the internal speaker
or through headphones using the 3.5 mm jack located on the FieldFox side
panel.
The Tune & Listen tuner is separate from the SA display. This allows you to
listen to one frequency while displaying a different range of frequencies. The
Tune & Listen measurement alternates between normal SA sweeps for the
display and performing audio demodulation at the Tune Frequency. See the
Listen Time setting for more information.
Figure 9-3 Tune & Listen ON
In the graphic above, Tune & Listen ON with Tune Frequency is indicated by a
vertical bar (highlighted).
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