SA (Spectrum Analyzer) Mode (Option 233–Mixed Analyzers)
SA Mode Settings
— N991xA and N995xA FieldFox Combination Analyzers to have Options 209,
210, and 233
— N993xA and N996xA Spectrum Analyzers to have Options 209 and 220
Source offset tracking is used to offset the Source frequency from the Receiver
frequency by a fixed offset at every tune frequency. This feature is used when
the DUT contains a frequency translation device or mixer.
How to set Tracking Offset and Offset Reversal
— On the Receiver unit, press Measure 1
—Then Source
—Then Advanced
— Then choose one or both of the following:
—Tracking Offset
Enter an offset value.
—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. Also, AM/FM Metrics displays the demodulated signal and the audio
frequency spectrum.
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.
Keysight N9938-90003 User's Guide
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