Keysight Technologies FieldFox A Series, Руководство пользователя

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Keysight N9927-90001 User’s Guide 261
IQ Analyzer (IQA) – Option 351 (CPU2 Only)
I/Q Analyzer (IQA) Mode Settings
I/Q Analyzer (IQA) Mode Settings
Select IQA Mode before making any settings in this chapter.
How to select IQA Mode
— Press Mode_ .
— Then More (may not be available—number of installed options dependent)
— Then IQ Analyzer .
How to Make Measurements Using the I/Q Analyzer Mode
The Measure menu is used to set common parameters, predefined views
selection, and measurement switching.
Spectrum has only one predefined view and Waveform measurement has two
predefined views. There is a User Defined measurement, which can be used to
display up to four different views (windows) simultaneously on the display
screen. You can select which type of data to display in each of the views from
the Trace menu.
See also, “How to Capture I/Q Data to a File” on page 262 .
1. Press Preset then Mode Preset (Factory)
2. Press Measure 1 then choose from the following:
— Spectrum (Freq Domain) (Default) – Selects frequency spectrum as
the current displayed measurement.
— Waveform then choose one of the following:
— RF Envelope Selects log RF envelope in time domain
(default).
— IQ Waveform Selects linear Real and imaginary I/Q
waveform values.
— User Defined Selects a default user defined 4-quadrant display
showing the following data:
— Log magnitude of the spectrum of the I/Q data versus
frequency
— Log magnitude of the I/Q data (RF Envelope) versus time
When you initially select I/Q Analyzer, Real-Time SA, or some of the other
spectrum settings (such as center frequency) a factory channel
Equalization measurement is applied to the signal. During channel
equalization measurement, the FieldFox displays a "Start Channel
Equalization". Stopping channel equalization is not permitted. See also,
“Alignments” on page 180 , in Chapter 9, “SA (Spectrum Analyzer) Mode.”