Keysight N9927-90001 User’s Guide 253
IQ Analyzer (IQA) – Option 351 (CPU2 Only)
I/Q Analyzer (IQA) Mode Settings
Default: 10 MHz, minimum: 10 Hz, maximum: 10 MHz
Adjusting the Scale and Amplitude Settings
Enables you to change attenuation settings. When RF Attenuation Auto is ON,
the RF Attenuation is set by adjusting the acquisition. As the acquisition is
lowered, for example from -10 dBm to -30 dBm, the FieldFox assumes that you
are looking at low-level signals. The RF Attenuation value is automatically
lowered in 5 dB steps to allow low-level signals to be viewed. The RF
Attenuation value is never automatically lowered below 5 dB.
How to set Scale/Amptd
—Press Scale/Amptd.
Manually set Log or Linear Scale Type (Spectrum and RF Envelope Only)
Then select from the following:
— More
——Scale Type [current setting]
(Spectrum and RF Envelope) —
Only)
——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
(default: 10 dB, minimum: 0.01 dB, maximum: 20 dB).
——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 (Spectrum).
——Y-axis graticules show voltage (V) – (RF
Envelope).
Manually set Scale, Unit, Acquisition, and Reference Position.
— Autoscale
Automatically adjusts the Y-axis to comfortably fit the Minimum
and Maximum amplitude of the trace on the screen. Also, optimizes the
FieldFox’s signal level at the mixer and adjusts the reference level to with
the autoscale settings.
— Scale/Div
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
.
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