LeCroy USB Mobile HS, User Manual

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USB MobileHS User Manual Chapter 5: Reading a Trace
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Step 2 Select Expand This USB Transfer .
The screen displays 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.
5.17 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.