Agilent Technologies ESA-E Series User And Programming Manual page 61

2. The I/Q error views are shown in
sinusoidal modulating waveform of the interfering PM signal is
shown in the phase error versus time graph. If the graphical result
was random, it would have indicated phase noise and not a PM
interfering signal.
Figure 4-27 I/Q Error Display Showing PM Interference
Chapter 4
Making Modulation Analysis Measurements
Interpreting Measurement Results
Figure 4-27. Observe that the
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