Using the Occupied BW Measurement

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Occupied Bandwidth integrates the power of the displayed spectrum and puts markers at the frequencies between which a selected percentage of the power is contained. The measurement defaults to 99% of the occupied bandwidth power. The power-bandwidth routine first computes the combined power of all signal responses contained in the trace. For 99% occupied power bandwidth, markers are placed at the frequencies on either side of 99% of the power. This would leave 1% of the power evenly distributed outside the markers. The difference between the marker frequencies is the 99% power bandwidth and is the value displayed.
The Occupied BW result will correspond to the span between the two markers and will be a multiple of the span between two points. So, for a 10 MHz span, the OBW will come in multiples of 39.216 kHz (10 MHz divided by 255). Values will be 0, 39.216 kHz, 78.431 kHz, 117.647 kHz, and so forth. For narrow signals (TDMA, PDC, and so forth) you will need to zoom in on the signal to get a reasonably accurate Occupied BW result. For a 100 kHz span the Occupied BW resolution will be 392 Hz (100 kHz divided by 255).
The occupied bandwidth measurement can be made in single or continuous sweep mode. The center frequency and reference level may be set by you.