272                                                                                                                     Keysight N9927-90001 User’s Guide
IQ Analyzer (IQA) – Option 351 (CPU2 Only)
I/Q Analyzer (IQA) Mode Settings
For Waveform Measurement:
— Trace 1 2 3 4
 Pressing the Trace key enables you to select a different 
trace number. This softkey is active when Data is set to Spectrum or 
RF Envelope.
— Trace State Sets a different trace state to each of four traces. This 
softkey is active when the data is set to Spectrum or RF Envelope 
(Log). Pressing the Trace State softkey enables you to change the 
State of the selected Trace number of the Trace Data (default: Clr/Wr 
– assigned to trace 1. Traces 2, 3, and 4 are set to Blank).
Adjusting the Frequency Settings
—Press Freq/Dist.
— Then select from the following:
— Center
 Sets the center frequency of the measurement trace (default: 
1 GHz, minimum: 0 Hz, maximum: FieldFox model dependent).
Time Summary – Time Summary result includes 
the capture time, spectrum analysis time and 
waveform start/stop time. 
I vs. Time – Imaginary vs. Time
Q vs. Time – Quadrature vs. Time
Q vs. I – Quadrature vs. Imaginary
RF Envelope
Phase vs. Time
Unwrapped Phase vs. Time
Time Summary – Time Summary result includes 
the capture time, spectrum analysis time and 
waveform start/stop time. 
Spectrum and RF Envelope have six markers that can be applied to any of 
the 4 traces.
 
Waveform’s six markers can be applied to RF Envelope, Real, Imaginary, 
Phase, Unwrapped Phase, and Q vs. I. 
— RF Envelope has four traces. 
— Real, Imaginary, Phase, Unwrapped Phase, and Q vs. I have 1 trace 
each.