Analysis Interval (Channel Quality)
sets the amount of time (in seconds) to process for each channel quality measurement. The number of repetitions of the stimulus signal (periods, or 1/Tone Spacing) is calculated and displayed (grayed out) to the right.
More data will be acquired than this to account for settling and for the compensation smoothing interval.
A longer analysis interval may be helpful in situations where a relatively noisy signal is analyzed.
Channel Quality measurements provide a single estimate of the physical channel (group delay, phase linearity, amplitude linearity). Therefore, physical channel variations changing within the analysis interval will not be measured correctly. However, some other impairments (specifically phase and gain drift) are estimated and compensated across the full analysis interval. See Compensation tab for more information.
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