Keysight N9912A - Page 117

Keysight N9912-90001 User’s Guide 8- 9
SA (Spectrum Analyzer) Mode
SA Mode Settings
When RF Attenuation set to Auto, the RF Attenuation is coupled to Reference
Level.
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 Reference Level 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 Reference Level in the current Unit selection. Y-axis
graticules show percent of Reference Level (%) below or above the
reference line.
Manually set Scale, Reference Level, and Reference Position.
— 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 8-10.
— Ref Position
Manually set the position of the reference line. Values must be
between 0 (TOP line) and 10 (BOTTOM line). Default position is zero (top).
—Press More
, then Autoscale Automatically adjusts the Y-axis to comfortably
fit the Min and Max amplitude of the trace on the screen.
How to Set Y-axis Units
The Unit setting appears for the reference line, marker readouts, and trigger
level. All Unit choices are available in both Log and Linear Scale Types.
The UNIT setting survives Mode Preset, but NOT Preset.
—Press Scale / Amptd
, then More, then Unit.
— Then choose from the following:
— dBm (default setting), dBmV (dB milli Volts), dBuV (dB microVolts),
W (watts), V (volts), A (amps), dBmA (dB milliAmps), dBuA (dB
microAmps).
Antenna correction units are available ONLY by loading or editing an Antenna
file that contains the desired units setting. Learn more in “Using the
Antenna/Cable Editor” on page 8-13.