Chapter 3 —Mobile WiMAX Signal Analyzer 3-5 Mobile WiMAX Demod Measurements
WiMAX MG PN: 10580-00236 Rev. D 3-9
Spectral Flatness
The Spectral Flatness view shows the data that is collected from the preamble at the channel
estimation step. The deviation of the Spectral Flatness from the average (over all of the
carriers) is shown in dB. A mask that conforms to the specification is overlaid on the trace.
Green color on the mask indicates pass, and red color on the mask indicates regions of the
mask where the signal fails.
This mask is referenced from the average of all subcarrier amplitude values. The numerical
result that is displayed in this view is the adjacent subcarrier flatness (in dB).
Press the Spectral Flatness submenu key to select the measurement. The sample image
in Figure 3-6 may differ from any image on your instrument.
Figure 3-6. Mobile WiMAX Demodulator Spectral Flatness Measurement
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