Now I am trying to use LabVIEW 8.20 to capture the waveform of the Tektronix TDS220 osilloscope(bandwith 100MHz,1GS/s Sample Rate 8-bit) to PC via GPIB interface card(PCI-3488, Adlink technology inc. made in Taiwan, up to 1.5MB/s data transfer rates). I have installed LabVIEW 8.20, NI VISA 4.1 and tktds2xx.llb(
http://sine.ni.com/apps/utf8/niid_web_display.model_page?p_model_id=289). Now It works well and I can get the answer form the osilloscope. But When I run the GPIB.VI in LabVIEW example, I write "*IDN?", it read "TEKTRONIX,TDS 220,0,CF:91.1CT FV:v2.03 TDS2CM:CMV:v1.04" in less than 1second. When I use TKTDS2XX Getting Started 2.VI in tktds2xx.llb to catch the whole waveform(2500 dots) displayed on TDS220 osilloscope, it takes almost more than 8 seconds. Then I change to use wavestar(software for TDS220) to capture the waveform via RS232, it also takes about 10 seconds. So I don't know why it takes so long to transfer the waveform to PC when using GPIB. Can anybody help me to make it faster and realize real-time control and capture?
Thanks for your attentions! Any comments will be appreciated!
