I realized 4424A was not working after computer wakes up, there was a red light on the unit, and PicoScope did not find the unit, however it was visible in Windows 11 device manager. Re-plugging the unit also did not help, I had to restart the PC and then it worked as expected. I thought maybe it is related to USB power down during sleep and disabled the power down on the hub it is connected to. Now after the sleep, PicoScope found it but could not run/use it, the light did not go to green. Re-plugging it worked this time. So my question, is the behavior after sleep defined or should I always re-plug it after sleep or is there a certain setting in Windows that should be used or is it related maybe to some USB controllers ?
Mete
red light after computer wakes up
Re: red light after computer wakes up
I think my question is broader than this. I am also trying to use it with MATLAB and sometimes I see red light and when it appears MATLAB cannot find it, PicoScope 7 also cannot find it. Reconnecting USB does not change, red light stays. I guess the red light is some sort of error signal, but why I cannot reset it ? Is it related to Windows / Windows driver ? I restarted the computer but the red light did not disappear but this time MATLAB found it. So I am very confused what red light signals, and why it happens, and why sometimes programs cannot connect to it but other times can even with red light is on.