172 Keysight N9915-90020 User’s Guide
SA (Spectrum Analyzer) Mode (Option 233–Mixed Analyzers)FUTURE
SA Mode Settings
The goal is to set the gain as high as possible (to take advantage of the
range of the IF and audio paths) without distorting the audio signal. It is
recommended that you keep increasing the gain until you hear distortion in
the audio and then back off until you no longer hear any distortion.
(Default = 0, Minimum = –50 dB, Maximum = +50 dB)
Tune Frequency
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.
Set the Tune Frequency using one of three methods:
1. Selecting Preset
> Mode Preset, sets Tune Frequency to 3.25 GHz (e.g., for
a N9914C FieldFox).
2. Specify Tune Frequency:
a. Press Meas Setup 4
> Tune Freq
b. Enter a value using the numeric keypad, arrows, or the rotary
knob. Then select a multiplier key. Learn about multiplier
abbreviations
“Multiplier Abbreviations” on page 46.
3. Using Mkr->Tune Freq:
— Create a normal marker at the frequency of interest. Learn how in
“How to create Markers” on page 734.
a. Press Mkr->/Tools
b. Then Mkr->TuneFreq to change the Tune Frequency to that of the
marker.
Listen Time
While Tune & Listen is actively demodulating a signal, the SA does not sweep
and update the display. Listen Time sets the amount of time that the FieldFox
demodulates, then stops to perform a single sweep and update the display,
then again demodulates.
The system volume setting should still be used to determine the final
desired volume/level of the audio output. Learn more, see also
Chapter 31,
“System Settings.”
and “Audio (Volume) Control” on page 769.
To improve sound quality, try increasing power by reducing the
Attenuation setting and, if available, turn ON the Preamplifier. Learn how
in
“Attenuation Control” on page 161
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