"GPIB error Query Interrupted" flashes on HP54542A

[tfowler]

I've written a display and control program in Delphi 7 for the HP54542A. The program uses NI commands and the GPIB-32.dll library, per NI's recommendation. The program appears to work properly, but I frequently get the message "GPIB error-Query Interrupted" flashing on the scope screen. I've tried putting delays in the software after read and write commands, but that seems to have no effect. Any suggestions? The version of the GPIB-32.dll that I have is dated 1999. I'm using a fairly new NI PCMCIA card in a new Dell laptop.

[craigherdman]

tfowler,

Perhaps someone in the community has some experience with the HP54542A. We do have a newer GPIB driver which has a newer GPIB-32.dll that you could try:

NI-488.2 Download

We also have CVI and LabVIEW instrument drivers for this instrument that you could try out (since you are using Delphi you could at least check out what the drivers are doing and get some ideas):

54542A Driver Downloads

Craig H.