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The minimum equipment required for analysis of a
Universal Serial Bus consists of the following
equipment:
Minimum Equipment
Required
• A 166x, 167x , 1680/90, 1671x , 1674X, 1655x or
1675x logic analyzer
• The USB Analysis Probe Product
• A USB target wire
Revisions
This manual applies to Hardware revisions ACE or
later and software revision 3.0 or later.
This operating manual uses the same signal notation
as the UNIVERSAL SERIAL BUS SPECIFICATION -
REVISION 1.0.
Signal Naming
Conventions
The USB Analysis
Probe Switches and
Diodes
The USB Analysis Probe contains one switch and four
LEDs
The Slow Speed Only
Switch and LED
The slow speed switch should be in the ON position
(LED ON) when the USB Analysis Probe is on a slow
speed only wire or slow speed only segment of the
USB. When attached to a high speed segment or
mixed segment (slow speed and high speed traffic)
the switch should be in the OFF position (LED OFF).
The USB Busy LED is lit when the USB Analysis
Probe is actively receiving packets from the USB
wire. The LED may appear dim if the traffic load is
light.
USB Busy LED
Ready LED
The Ready LED indicates that the on board serial
ROM has successfully loaded the FPGA and that the
USB Analysis Probe is ready for USB analysis.
VCC LED
The VCC LED on the USB Analysis Probe indicates
that power is applied from the logic analyzer to the
USB Analysis Probe logic. For correct operation of
the USB Analysis Probe the VCC LED must be lit.
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