LeCroy Waverunner LT322 setting the delay

[TheBorris]

I am trying to set up labvew to control my lecroy but I can’t seem to find a way for setting the "delay" as I would using the "delay" wheel on the front of the scope.I need some of the waveform that happened before the trigger point as well as after the trigger.

Can any one help please?

Thanks

[NathanT · Accepted solution]

Hello Trans,

      Since the NI-Certified driver for the LT322 is an IVI driver, it should implement Configure Acquisition Record.  In that function (or VI), there is a "Start Time" input that you can pass a negative value to get pre-trigger samples.  That is what you were looking for, correct?

Cheers,

NathanT

[xdaf]

If your Waverunner is compatible with Xstream / ActiveDSO, use the 'app.Acquisition.Horizontal.HorOffset = nnnnn' command

[TheBorris]

I have just had this emailed to be from Lecroy.

Acquisition start time
Specifies the length of time from the trigger event to the first point in
the waveform record.  If the value is positive, the first point in the
waveform record occurs after the trigger event.  If the value is negative,
the first point in the waveform record occurs before the trigger event. The
driver sets the lcltxxxx>>Acquisition>>Acquisition Start Time to this
value.

Valid Range:
Max = 1000.0 * horizontal time per record
Min = - horizontal time per record

The unit is in seconds.

Default Value: 0.0