Data AcQuisition And Real-Time Analysis
Scope - Spectrum - Spectrogram - Signal Generator
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Spectrum Analyzer

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Spectrum Averager Toggle

Controls: Spect Avg Dialog >> Average
Macro: Avg

When the Spectrum Averager control dialog is visible, you can start an average by clicking on the Average button at the top of the dialog. Alternatively, whether the dialog is visible or not, you can click on the Averager button at the left end of the toolbar, or use the ALT+A accelerator key.

Note that these will normally only start a spectrum average from the spectrum display mode; in the waveform display mode a waveform average will be started instead. Once you have started a spectrum average you may toggle the Spectrum display button off (or use ALT+S) at any time to see the current raw incoming waveform.

The toolbar Averager button will change to 'Spect Avg' when the spectrum averager is running, and it will stay that way after an average completes. At that point the display will be Paused and will show the results of the completed average. The output of the Generator will continue normally, if it is active. Toggling the Pause button off (ALT+P) will restore non-averaged operation, and the 'Spect Avg' label will return to 'Averager'.

However, if the wave average is done and paused, such that the 'Spect Avg' label is still showing, then starting a new average by any of the above methods will always start a spectrum average, even from waveform display mode.

When an average is running, you can abandon it at any time by toggling it off. The display will revert to showing current "live" data, and the 'Spect Avg' label will return to 'Averager'.

If you hit Pause during a running average, the display and the averager operation will be frozen until you unPause, or until you abandon the average by toggling it off. Signal output from the Generator is unaffected.

A running average will show the total number of frames accumulated in the Total Frames Counter (beneath the toolbar Averager button). This value will stop incrementing when the average is done, when the requested time constant is reached in Exponential mode, or when it is paused. It will be cleared when the average is abandoned, either by toggling the Averager off if it has not yet finished, or by toggling the Pause state off if it is done.

Macro Notes:

Avg=1 starts a Spectrum Average if the display is currently in Spectrum mode. In waveform mode it starts a Waveform Average. Avg=0 cancels the average, and Avg=x starts an average if none is running, or cancels a running average.

Caution: Be very careful with Avg=0 or Avg=x. If a running average is cancelled, the averaged data is lost and the display reverts to live data. Use Pause=1 to Pause a running average, and Pause=0 to resume the average.

WaitAvg or WaitPause Event Wait Macros may be used to suspend macro processing until an average is done, so the results are available to be saved or otherwise processed.

See also Averager and Spectrum Averager Controls.


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