Transmit Mask (802.15.4 HRP UWB)
The trace shows the spectrum of the signal with limit lines as defined by the standard (0 dBr is set to the maximum value within |f| ≤ 0.65 / Tp).
The Transmit Mask trace is calculated from the data in the Time trace and is computed by averaging multiple spectra to simulate a video bandwidth ≤ 1 kHz kiloHertz: A radio frequency measurement (one kilohertz = one thousand cycles per second).. The window used in computing the spectra is the Gaussian Top window.
A single measurement may not contain enough data to achieve a 1 kHz VBW. The VBW annotation in the trace indicates the actual video bandwidth. To simulate the desired VBW, increase the time length by analyzing a longer signal (for example, SYNC Length = 1024).
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