Spectral Flatness (802.11n/ac/ax/be)
limits being applied to the spectral shape of the signal. Any points that are outside the limit will be drawn in red. The limit line pass/fail or Y Margin values can be seen in the Markers window. When Measurement > Average Type is set to RMS, the WLAN measurement will average the Spectral Flatness trace over multiple acquisitions (multiple bursts). The "xTime:" annotation indicates the number of OFDM data symbols that have been accumulated in the average.
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