Thanks for your reply.
Yes, I am communicating with the instrument (and 8 others) on the bus. I can command the instrument to produce the waveforms currently programmed into the box using the driver downloaded from the Tek website. However, there is a syntax problem in sending a waveform to the instrument, that has not been resolved. (I'm talking about the TRACE:DATA commands where "" is a concatenated string of unsigned two bit integers that were converted into a string. The tech support at Tektronics hasn't been able to add any guidance, other than two people telling me, "it sounds like you are sending it the correct syntax", and another Tek representative saying, "yeah, there are errors in this manual--it's not the greatest!"...It's a simple
program (besides their syntax) that I have emailed to them also, and they haven't responded.
For anyone who encounters this problem, I did get it working, using the command which replaces points into the waveform (forget the exact syntax--it's something like "VALUE:DATA ,". (I'm at home going from my memory--don't have the manual handy) I put this in a big loop of however many points you want to create, then copied it to the "USER2" block in memory. It works but is not as optimum as the first method should be (except it doesn't work!). So follow this command's instructions in the manual, and program it in a loop to change the value of whatever is in USERx memory, and it will work. Takes about 1 minute for every 1000 points in the waveform you are trying to create (16,384 points maximum in the AFG320)
Anyway, thanks again for your reply, and good luck to anyone that needs to do this!