How to generate an accurate waveform using GPIB?

[epsilon-delta]

I am using Labview 8.6.1.  I want to generate a piece-wise waveform using an Agilent 33120A function generator and GPIB.  I want to create the output waveform by sending one point at a time over the GPIB bus to the function generator.  I can do this by putting the GPIB write inside a loop and writing one waveform amplitude point at a time.  The problem is that although the amplitudes of the waveform are correct, the timing is not precise.  By timing, I mean the time between consequtive points on the waveform.  I guess this is because the loop is software timed and can be interrupted by the activities of Windows XP.  Can anyone suggest a good way to do this to achieve accurate waveform timing?  Thanks.

[AnalogKid2DigitalMan]

Epsilon-Delta: 

Refer to the Programming guide, see if you can download your desired waveform into the arbitrary waveform memory and then program the generator to execute the waveform at the given rate.

At least that is how I would start to approach the task.

-AK2DM

[NathanT]

Hello,

       Have you downloaded the LabVIEW Instrument Driver for your instrument?  It can be found here.

Cheers,

NathanT