Abstract: A system for a universal serial bus (USB) device to perform power configuration to operate with a USB host. A connection to the USB host is enabled. Then a high-power configuration is reported to the USB host and successful enumeration by the USB host is monitored for. If such enumeration is not forthcoming within a preset time, the connection to the USB host is disabled and re-enabled, and a low-power configuration is then reported to the USB host. Optionally, the system can further ramp up power usage until a preset high-power configuration is reached, or until there is voltage sag on the VBUS and then either ramp power usage back down or measure the sag and set to a calculated power usage.

Abstract: An on-line thickness gauge (OLTG) and method are described herein that are capable of measuring a thickness of a moving glass substrate. In the preferred embodiment, the OLTG includes a Y-guide and a stabilizing unit that respectively captures and stabilizes the moving glass substrate. The OLTG also includes a laser instrument which contains a laser source and a detector. The laser source emits a beam at the front surface of the moving glass substrate. And, the detector receives two beams one of which was reflected by the front surface of the moving glass substrate and the other beam which was reflected by the back surface of the moving glass substrate. The OLTG further includes a processor that analyzes the two beams received by the detector to determine a distance between the two beams which is then used to determine the thickness of the moving glass substrate.