Teledyne LeCroy HPT - Users Manual - Manual (Page 3)

CATC HPT User’s Manual Version 2.27
Page 1
1. INTRODUCTION
The CATC HPT USB Host Production Tester is designed for use on the production line to test
the Universal Serial Bus ports of USB-capable motherboards and PCs, according to the USB
specifications. The HPT supports USB host implementations of both the Intel UHCI and Open
HCI specifications.
CATC HPT Features:
•
Intel 8x930 USB controller-based circuitry, packaged in a sturdy metal box
•
DOS-based software program verifies functionality of the USB system under test
•
supports UHCI and OHCI USB host implementations
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two cables enable simultaneous testing of two USB root ports in under 10 seconds
•
tests for full- and low-speed port operation
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enclosure-mounted LEDs for second-level visual status and test verification
•
can be incorporated into customer system test platforms (custom integration service
available)
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tested for compliance with the USB specification
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one year warranty and hot-line customer support
The HPT box connects to the two USB ports of the USB Host PC unit under test, using two USB
cables. The tester is an intelligent USB device, allowing for quick and accurate testing for proper
USB device enumeration, data transfers, and detection of connection status for full- and low-
speed devices, as well as the proper operation of USB host interrupt circuitry and the various
USB status flags.
The HPT software program connects with the tester via the USB host controller on the
motherboard. For each port, the HPT software checks for proper operation in both full- and low-
speed modes. When all tests are successful, the software declares the USB host unit functional.
Any failures are both displayed on the screen and saved as a text file. For units that fail these
tests, a CATC Inspector
™ or Detective ™ USB Bus & Protocol Analyzer can be used to assist in
debug and rework.
1.1 USB Overview
USB is an open industry standard, providing a simple and inexpensive way to connect up to 127
devices to a single computer port. Keyboards, mice, tablets, digitizers, scanners, bar-code
readers, modems, printers, and more can all run at the same time. USB devices plug into any
platform that supports the standard, from notebooks to desktop PCs to workstations.
USB is a dynamically reconfigurable serial bus with an elementary data rate of 12,000,000
bits/sec, based on off the shelf, low cost micro-controller technology. Its modular layered
software protocol supports sophisticated device drivers and application programs.