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Burst Lag

Macros: BurstLag, BurstLagMod

This is a delay before the burst starts to rise. Its primary use is to delay a stream relative to other streams, or relative to the Sync point at the start of the trace. For example, you may want to generate two or more tone bursts during one stimulus interval. If you want the second burst to start 10 msec after the first, simply set the second Burst Lag time to 10 msec (or the equivalent number of samples, if you prefer, depending on the Samples/Seconds button state). This is the case whether the delay is between bursts on the same output channel or between channels.

Burst Lag Modulation

Normally, you can ignore the small Lag pushbutton and just use the edit portion of the control. The button opens a Burst Time Modulator dialog that allows the Lag time to be modulated, either by a sine wave source with adjustable frequency and phase, or by some other stream source. You can also set the base Lag value from that dialog (it's just a duplicate of the main Lag control), as well as the modulation depth.

When modulation is applied, the effective Lag time is equal to the sum of the base Lag value plus the modulator scaled by the modulator depth. For example, if the depth is 10% then the effective Lag ranges from 90% to 110% of its base value. If the base Lag is 100 samples, the effective Lag will then range from 90 to 110 samples.

Macro Notes:

L.1.BurstLag=10 sets Left Stream 1 Burst Lag to 10 samples, assuming Smpl mode. It will set 10 seconds in sec mode. To be safe, use a SmplSec command to set the desired mode before using this command.

L.1.BurstLag=>1 increments and L.1.BurstLag=>-1 decrements by one sample, even in sec mode. Only +/-1 sample steps are allowed.

If the Burst Dialog is open, BurstLagMod=1 opens the associated Burst Time Modulation dialog, BurstLagMod=0 closes it, and BurstLagMod=x toggles between open and closed. See further information under Burst Time Modulation.

See also Burst Overview, Burst Dialog Controls


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