Keysight N9927-90001 User’s Guide 165
SA (Spectrum Analyzer) Mode
SA Mode Settings
— Source CW Freq Sets the CW frequency that is used when Source Mode is
set to CW.
To cause the source to stay ON at the end of each sweep, turn battery saver
OFF. (Learn more in “How to Access Individual Alignments” on page 185.)
—Press System 7
—Then Preferences
—Then Preferences
— In the table, select Battery Saver. Press Edit then Battery Saver ON OFF
To suspend InstAlign: (Learn more in “How to Access Individual
Alignments” on page 185.)
—Press Cal 5
—Then Amptd Alignment OFF
Resolution Bandwidth (Res BW)
In SA Mode, the Res BW provides the ability to resolve, or see closely spaced
signals. The narrower (lower) the Res BW, the better the spectrum analyzer can
resolve signals. In addition, as the Res BW is narrowed, less noise is measured
by the spectrum analyzer ADC and the noise floor on the display lowers as a
result. This allows low level signals to be seen and measured. However, as the
Res BW is narrowed, the sweep speed becomes slower. See “Very Long Sweep
Times” on page 170.
How to set Res BW
—Press BW 2.
—Then Res BW
.
— Then choose from the following:
—Auto
Res BW is coupled to the frequency span. As the frequency span
is narrowed, the Res BW is also narrowed providing increased ability
to resolve signals.
To change this setting from Man to Auto, press Res BW twice.
—Man
Enter a Res BW value using the numeric keypad, the arrows,
or the rotary knob. Then press a multiplier if necessary or press Enter
The current Res BW setting is shown at the bottom of the screen.
#Res BW x.xx XHz (#) means manual setting.
By default, the source output will turn off momentarily at the end of each
IQA and SA sweep and also every 300 seconds during the InstAlign
process.
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