It's possible that Windows 10 is powering down the hub that the device is connected to. In the Windows 10 Settings dialog click on devices and scroll all the way down to the bottom and select Device Manager. Then click on USB controllers to open and view all the hubs. Double click on each hub and select the Power Management tab and then uncheck the box that allows the computer to turn off the device to save power. See if that helps.

Also make sure that Windows Sounds are off. This is because Windows may stop all I/O including USB when it's doing a sound. (Or at least that's what I've heard).

Good Luck!

73,
Brian, K0DTJ

On 7/13/2017 15:31, VA2EW wrote:
Hi all,

Last WE during the IARU HF I have tested the use of the USB input of the K3S in replacement of a RIGEXPERT TI-5 box.

Everything looked great until I experimented that sometimes randomly the beginning of the first dash or dot was missing when sending CW via Wintest under Windows 10.


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