Why does fclose()/instrreset take 120 seconds no matter what I do when using visa object with Keysight VNA?
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I am using the instrument control toolbox to control a Keysight PNA. The following code causes matlab to lock up for 120 seconds at fclose(vna) and I can't figure out why. I am able to control the VNA, take measurements, read, etc. Only once I try to use fclose(vna) or instrreset I get a 120 window of nothing from Matlab. I have the latest versions of the instrument control toolbox and Matlab 2018a.
v = instrhwinfo('visa','keysight');
vna = (eval(v.ObjectConstructorName{1}));
fopen(vna);
fclose(vna);
1 commentaire
Faiz Gouri
le 25 Mai 2018
MATLAB is waiting for the Keysight drivers to close the connection. You can check Keysight IO monitor logs to see the reason for this delay.
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