Hello,
I have been using the HP5350B, an old HP frequency counter for a remote control application. I am using the GPIB commands to send and receive messages from the instrument. I have attached the screen shot of the code which uses a GPIB read block to read the value from the instrument. Earlier when I used a GPIB-USB-HS connector I was able to get the desired values using this code. Recently I got a PCI-GPIB card which I installed in my computer and ever since have been trying to read measages from the instrument with this card in the computer, but I have not had success at reading the value from the instrument using the same code. I have been getting the error shown in the attachement. The only difference I found between using the GPIB-USB-HS and PCI-GPIB card is the change in the address of the instrument from GPIB1::7::INSTR(for PCI-GPIB card) to GPIB0::7::INSTR (GPIB-USB-HS) which showed up in NI MAX.
Now when I connect the GPIB-USB-HS back to the computer and try communicating with the device with the same code I am unable to reproduce the results I was getting earlier. I would really appreciate any comments in helping me resolve this issue.
Thank You,
Vivek