How do i write waveform data to gpib device (tds 420a)?

[Nhat]

I'm using a tds 420a and able to obtain a waveform from a tds 420a using tktds4xx, a LabVIEW IEEE 488.2 (GPIB) LabVIEW Certified Plug and Play Instrument Driver example. However, what I want is to generate a waveform from the computer and display it in the device. I looked all over and found only the waveform (TKTDS Read Waveform.vi) which only allow me to read from the device. Please help!

[Dennis_Knutson]

The fact that there is no such VI might mean that the scope doesn't support such functionality or that the driver developer felt that it wasn't necessary to include it. First look in the scope manual to see if such a thing is possible. If such a command exists, you should be able to write your own VI.