Keysight N9927-90001 User’s Guide 151
SA (Spectrum Analyzer) Mode
SA Mode Settings
Reverse Swap
Available ONLY with Opt. 209 and while in Step sweep mode. Each press of the
softkey causes the Start and Stop frequencies to swap. The Start becomes the
Stop and vice versa. Learn more about Step versus FFT sweeps in “FFT Gating
(Opt 238)” on page 172.
—Press Freq/Dist
then More.
—Then Reverse Swap
Scale and Units
Adjust the Y-axis scale to see the relevant portions of the data trace.
The Y-axis is divided into 10 graticules. A acquisition is shown on the screen as
a solid horizontal bar that can be placed at any graticule.
When RF Attenuation set to Auto, the RF Attenuation is coupled to acquisition.
How to set Scale
Press Scale / Amptd. Then choose from the following:
— Scale Type [current setting]
—Log Logarithmic scale (default setting). The Y-axis reference line
represents the specified absolute acquisition in the current Unit
selection. Y-axis graticules show dB below or above the reference
line.
—Lin
Linear scale. The Y-axis reference line represents the specified
absolute acquisition in the current Unit selection. Y-axis graticules
show percent of acquisition (%) below or above the reference line.
Manually set Scale, acquisition, and Reference Position.
—Press More, then Autoscale Automatically adjusts the Y-axis to comfortably
fit the Minimum and Maximum amplitude of the trace on the screen.
— Scale
Manually adjust the scale per division to view specific areas of the
current trace. Enter a value using the numeric keypad, the arrows, or
the rotary knob. Then press Enter
.
— Ref Level
Manually set the value of the reference line. Enter a negative
value by pressing Run/Hold (+/-)
either before or after typing a value. This
can also change the RF Attenuation setting. See “Attenuation Control” on
page 152.
— Ref Pos
Manually set the position of the reference line. Values must be
between 0 (TOP line) and 10 (BOTTOM line). Default position is zero (top).
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