Hello all,
I am trying to start simultaneous acquisition on two Keithley 486 devices using the GPIB GET ("Group Execute Trigger") functionality, using VISA. However this doesn't succeed, neither programatically, nor using the "VISA interactive Control" application.
What I am trying:
(1) I set up my Keithley devices for acquisition-on-GET, i.e., they are armed and waiting for a GET trigger.
I am quite sure this is done correctly, because if I assert the trigger on the instruments seperately, they start acquiring as intended.
(2) When I assert the trigger on the interface instead ("GPIB0::INTFC"), nothing happens -- the devices stay armed and do not start acquiring.
I have tried to do this both programmatically (using PyVISA that talks to the VISA DLL), and using the "VISA interactive Control" application. In the latter, selecting the "GPIN0::INTFC" device, going to the Advanced/Triggers tab, and pushing the "Assert Trigger" button doesn't work.
My questions:
- should this work, or is my expectation that this should work incorrect?
- what could I try to make it work?