Teledyne LeCroy USB Chief - Users Manual - Manual (Page 28)

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Chief User’s Manual CATC Version 1.7
Record & Generate USB Port
The USB Bus uses keyed connectors so that the type ‘A’ connector joins a cable
directed to downstream devices or to a hub and the type ‘B’ connector joins a cable
directed to an upstream host controller or to a hub. A USB hub is used to join
multiple devices to an upstream host controller and therefore has both type ‘A’
and type ‘B’ connectors.
The Record & Generate port has both type ‘A’ and type ‘B’ connectors so the
Analyzer can conveniently tap a USB branch. To connect your USB branch for
analysis, use the two SHORT (3-foot/1-meter) USB cables to insert the Analyzer
in place of the existing cable. Connect one cable to the type ‘A’ connector and join
it downstream to your device or hub. Connect the other cable to the type ‘B’
connector and join it upstream to your host or hub.
Note The USB Chief Bus & Protocol Analyzer is not a hub device; it connects to a USB
branch by inserting a non-intrusive, high impedance tap. Because of the poor
signal quality in the middle of a USB cable, CATC recommends using the shortest
possible cables so that the total length of both cables together is less than 6 feet.
The USB cables provided with your Analyzer meet this requirement. When longer
cables are used, the Analyzer may record incorrect data.
Secondary Record USB Port
When connected, the Secondary Record port taps another USB branch and records
bus traffic in the same fashion as the primary port. This port allows the
simultaneous recording of traffic on two USB branches. The USB Chief analyzes
the traffic from both ports and presents the analysis in a unified view.
Note When recording on both the Primary and the Secondary Channels, Generate is
disabled.
PC-for-Analysis Requirements
• x86-based personal computer (386 minimum, Pentium MMX, or Pentium II
recommended)
• USB connection to the computer (unless using the PC only as a viewer)
• Microsoft Windows 95(OSR 2.1), Windows 98, Windows 98SE, or Windows
2000 for recording and viewing traffic
USB Device
USB Host