# Burst Width

Burst Width is the time from the first edge of the burst that crosses either the lower-threshold or the upper-threshold to the last edge that crosses a threshold

For signal activity to be considered a burst, the signal must be idle for at least the specified amount of time both before and after the activity. Idle periods are portions of the waveform where the signal does not exceed the upper or lower thresholds.

Idle time can be counted in any region, as long as the whole idle period occurs in that region.

The following pictures show how the burst width is measured. The first picture shows the burst crossing the upper threshold first and the lower threshold crossing of the last cycle of the burst. The time between the two threshold measurements is the burst width measurement.

In the second picture, the lower threshold is crossed by the burst and the upper threshold of the last cycle of the burst is the end point of the burst measurement.

The minimum idle time is the minimum amount of time between bursts when no waveform activity of interest occurs.

## Configurable Measurement Parameters

This measurement is affected by the following settings (choose Measure > Thresholds...):

- Thresholds tab

## To measure

1. Click the toolbar's Time tab.
2. If necessary, click the toolbar's More buttons to locate the Burst Width button, and click it.
3. Select the signal on which to make the measurement.
4. Select the Region in which to make the measurement:
   - Displayed Waveform — is what you see in the waveform window (which can be a zoomed-in view of the complete waveform).
   - Entire Waveform — specifies the complete waveform.
   - Region N — If regions are enabled for the selected signal, you can select one of those regions.
5. Select the number of Occurrences to measure per acquisition:
   - Measure One — makes one measurement per acquisition using edges closest to the timebase reference.
   - Measure All — makes as many measurements per acquisition as possible using all edges in the acquisition. In this case, the measurement closest to the timebase reference is the "current" measurement (and is the one with annotations).
6. Select the Burst Idle time.

## SCPI Command

`:MEASure:HORizontal:BWIDth`