Keysight N9915-90020 User’s Guide 159
SA (Spectrum Analyzer) Mode (Option 233–Mixed Analyzers)FUTURE
SA Mode Settings
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:
— 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 161
.
—
Preamp Refer to “Preamplifier Control (Opt 235)” on page 162.
— RF Atten Refer to “Attenuation Control” on page 161.
— More opens another set of scale softkeys.
Manually set Scale Type, acquisition, and Reference Position.
— 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.
— Unit
Refer to “How to Set Y-axis Units” on page 160.
— Corrections Refer to “How to select and edit corrections for Field Strength
measurements” on page 163
.
—
External Gain Refer to “External Gain” on page 160.
— 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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