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Burst Pulse

Question asked by erickulcyk on Sep 30, 2011
Latest reply on Oct 10, 2011 by lhornburg

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Hello,

I controlling an 33250A arb. waveform generator using labview 2011. I am looking to produce a signal that has 4 sin-wave "pulses" that occur at fixed times, say 0microsecods, 2 microsecods, 5 microseconds, and 10 microseconds. Each pulse would be the same number of cycles at the same amplitude. It seems that burst mode only allows a fixed separation between pulses. How would I accomplish this?

Thanks for any help,
Eric

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lhornburg Oct 3, 2011 2:17 PM
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You could use an external or bus trigger with burst possibly to accomplish this, but there is no way to set the internal trigger source to these specific times in this particular instrument.

So is the delay between pulses a fixed sequence or is the delay order constantly changing? If it is repeatable you could create an arbitrary waveform with the appropriate DC gaps between sine waves to create the necessary delays.
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erickulcyk Oct 7, 2011 1:54 PM
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Thanks for the response. I created a simple labview program that configured a sin wave at a frequency of 10.2mhz with 30 bursts per trigger (300us per trigger). Then I run a timed while loop that sends triggers. However, if I send the trigger faster than about 10hz, the waveform generator says "error generated by remote interface command". I am looking for microsecond triggering, if this is possible.
here is a screenshot of my labview program:
https://skydrive.live.com/redir.aspx?cid=a232639336dd526c&page=play&resid=A232639336DD526C!172

The delays are repeatable, if I cannot trigger faster, an arbitrary waveform would work I guess.

Eric
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lhornburg Oct 10, 2011 1:53 PM
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I would suggest either using the *WAI command or the *OPC? query to ensure the burst is complete before sending another *TRG.

See attached image.
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- 33220A_wai_opc.jpg180.6 KB
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