LeCroy Advisor, User Manual

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Chapter 6: Reading a Trace USB Advisor User Manual
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LeCroy Corporation
Step 2 Select Expand This USB Transfer to display the selected transfer in expanded
format.
Note: The Expand/Collapse transfer feature operates as a toggle. When one
format is active, the other appears as an option on the Expand/Collapse
drop-down menu.
To collapse a transfer, perform the same operation and select Collapse This USB
Transfer .
Note that you can choose to expand or collapse
• Only the selected Transfer
OR
• All Transfers
It is not necessary to use the Expand/Collapse Transfers menu to shift between
expanded and collapsed views of a transfers. Double-click in the Transfer number field
to toggle back and forth between collapsed and expanded views.
6.17 Decoding Protocol-Specific Fields in Transactions
and Transfers
When transfers or transactions are displayed, the fields in setup transactions or control,
interrupt, and Bulk transfers by default do not get decoded and are shown in hexadecimal
values. The exceptions are setup transactions and control transfers for standard USB
device requests which are always decoded.
In order to show specific decoding for class- and vendor-specific device requests and
endpoints, you have to use the decoding association mechanism that is described in
Chapter 9 on decoding. When you have performed the association, you see the
protocol-specific fields of transfers and transactions decoded in the trace view.