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Introduction
The USB Analysis Probe module provides a complete
interface between any point on the USB and an
Agilent Logic Analyzer. The Analysis Probe interface
receives the USB serial bit stream and converts it to
an understandable parallel bus that is then acquired
by the logic analyzer.
The USB Analysis Probe is a passive bus monitor
which does not assert any signals on the USB . The
USB signals are received with a USB compliant
transceiver. The power for the Analysis Probe logic
and transceiver is taken from the logic analyzer. Thus
the Analysis Probe does not draw power from the
USB wire.
The USB Analysis Probe software configures all the
logic analyzer menus for compatibility with the USB
Analysis Probe. When the configuration file is loaded
and the analyzer is set to STATE mode, an inverse
assembler is also loaded which decodes USB packets
into easy to read mnemonics.
The USB Analysis Probe also provides access to the
actual USB wire for both digital and analog
measurements. D+, D-, GND, USB Power and the
transceiver outputs of VP, VM, and RCV are also
provided on the test points.
How to Use This
Manual
This manual is organized to help you quickly find the
information you need.
• Analyzing the Universal Serial Bus chapter
introduces you to the USB Analysis Probe and lists
the minimum equipment required and accessories
supplied for USB analysis. Characteristics
common to state and timing analysis are also
detailed.
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