Monitoring GPIB commands on GPIB bus automated without NiSpy

[RF_ATE_PRGR]

Does anybody know how NiSpy intercepts commands to the GPIB bus (first guess is a filter driver)? I need to monitor (automated) equipment activity on our ATE stations.

[JasonSmith]

Basically the National Instrument drivers notify a NI-Spy DLL each time a driver call is made.  If NI-Spy is running, this information is passed into the NI-Spy executable. 

NI-Spy can monitor any supported National Instruments driver in this manner, but it will not be able to monitor activity on the bus itself.  To monitor actual bus activity you would need something like a PCI-GPIB+ analyzer card, and utilize the GPIB analyzer which is included in the NI-488.2 driver.

Jason S.
Applications Engineer
National Instruments