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USB HIGH-SPEED Embedded Host Electrical Test Board (HSEHET)

The HSEHET board is a tool for initiating test modes on high-speed, downstream ports of embedded hosts.  The HSEHET board provides the ability to select which VID/PID (i.e. test mode) to expose to the embedded host. The VID/PID definitions are defined in the "Embedded High-speed Host Electrical Test Procedure."

If you would like to purchase HSEHET boards, please contact Mr. Fred Wu of Allion Test Labs, Inc. by email at

You may download instructions for performing high-speed electrical tests on downstream ports of embedded hosts.