Agilent U2354A USB modeswitch
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Raido Pahtma
May 11, 2018, 9:01:57 AM5/11/18
to python-ivi
Hi,
I have an Agilent U2354A which I would like to use on Linux through Python. It seems to behave similarly to U272XX devices - starts up in some DFU mode and is therefore not recognized as an instrument that could be used with VISA. Windows drivers quickly switch it over and it is then also possible move it over to Linux (unplugging USB does not reset it, has external power), where it can be used successfully with pyvisa. I tried to switch it over with both of the sequences in usbtmc for the U27XX series, but neither works. I have also taken some captures of USB traffic under Windows, but I cannot figure out what parts of it actually cause it to switch over to instrument mode. Couldn't find anything that would look similar to what usbtmc issues to the U27xx series. I have attached a Wireshark capture from Windows. I have tried some parts of it, but not the whole thing yet. Any insight into figuring out how to extract a useful sequence would be welcome.
R.
I have an Agilent U2354A which I would like to use on Linux through Python. It seems to behave similarly to U272XX devices - starts up in some DFU mode and is therefore not recognized as an instrument that could be used with VISA. Windows drivers quickly switch it over and it is then also possible move it over to Linux (unplugging USB does not reset it, has external power), where it can be used successfully with pyvisa. I tried to switch it over with both of the sequences in usbtmc for the U27XX series, but neither works. I have also taken some captures of USB traffic under Windows, but I cannot figure out what parts of it actually cause it to switch over to instrument mode. Couldn't find anything that would look similar to what usbtmc issues to the U27xx series. I have attached a Wireshark capture from Windows. I have tried some parts of it, but not the whole thing yet. Any insight into figuring out how to extract a useful sequence would be welcome.
R.
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