Welch Allyn Holter Software PCH100 and PCH200 - Installation Guide - Manual (Page 19)

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6. USB Hibernation
Overview – Most computers automatically turn off power (Hibernate) to the USB ports if the port has not been used in some time. The
Welch Allyn system requires that USB ports remain active at all times for the USB Bluetooth® Adapter and SD Card reader to operate
correctly. Use these steps to disable USB hibernation:
6.1 Right click My Computer on the Desktop and select Properties
.