Howard Eglowstein

Thanks. I was puzzled then by the example in the manual where a BASIC program computed a sine wave and sent it as one byte per point. I converted that to C and it generated a nice sine wave.

Dim num_points = 3000
Dim base = 9000
Dim offset = 6000
Dim SinePoint As Integer
Dim SineWaveData(num_points) As Byte
For i = 0 To num_points 'Build sine wave
   SinePoint = Int(base + offset * Math.Sin(i / 120))
   SineWaveData(i) = SinePoint / 256
Next i

Tvc1.SendEndEnabled = False
Tvc1.FormattedIO.WriteLine("TRACE:DATA EMEM1, #43000")
Tvc1.SendEndEnabled = True
Tvc1.RawIO.Write(SineWaveData)

It's been a while since I've written BASIC, but by my read this would send out 3000 bytes for 3000 points. I can believe the 31022 is the same as the 3022 was, but then this shouldn't work but it seems to?  

Anyway, thank you a ton for the help. I feel like I'm reverse engineering this puppy.

Thank you for confirming my experiment, the quick reply and the update.  Can you also confirm that the older 3022 was like 11 or 12-bit data (two bytes per point) and the 31022 is 8-bit or one byte per point?  The documentation for the 31022 is quite sparse in comparison to that of the 3022.

I have a shiny new AFG31022 that I selected because I need to generate waveforms greater than 128K pts in length. Try as I may, it seems to reject any commands that would download longer waveforms over the USB connection. I just installed the ArbExpress program to try out and it says that for waveforms longer than 128K you can't use th USB connection, but rather you must write them to a flash drive and transfer them that way.  Has anyone else noticed this, and is my plan to send it longer waveforms over USB completely hopeless?

Bonus question - the commands that used to clear user waveforms on the 3022 don't work. The manual isn't clear on a proper way to erase a user arbitrarry waveform. Is there a way?

Thanks!