Hi, I've an Empire Dual Pen Usb and I've seen that it loses progressively the signal with the SNR that slowly goes from 65% to about 50%. At a first time I thought that that it was due to the fact that the pen becomes hotter and hotter when plugged, but then I tried to unplug it when the SNR was at 50% and plug it again soon after (after one second) and I noticed that the signal was very good (SNR at 63%). So it seems that the problem is not due to the overheating, but I can't understand why it happens, do you have any idea? Xwang
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