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Why does fclose()/instrreset take 120 seconds no matter what I do when using visa object with Keysight VNA?

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David Rea
David Rea 2018-5-22
评论： Faiz Gouri 2018-5-25
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);

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