Reply To: GPIBNI, VISA, 34401A and *OPC? failing

[Mark Thuer]

Tony,

I don’t know what GPIB I/O your using, but the cheap Chinese knockoffs (i.e. for N.I. & Keysight) from eBay have issues. HT Basic uses the device registers to control the GPIB. The knockoffs don’t adhere to the strict register implementation of the original device and rely on the device drivers for data and control transfer.

Hope this helps.