Teledyne LeCroy USB Protocol Suite User Manual (Voyager_Advisor T3_Mercury) - Manual (Page 133)

USB Protocol Suite User Manual 133
Switch to Transactions View Teledyne LeCroy Corporation
5.26 Switch to Transactions View
A Transaction is defined in the USB specification as the delivery of service to an endpoint.
This consists of a token packet, an optional data packet, and an optional handshake
packet. The specific packets that make up the transaction vary based upon the
transaction type.
The program default display mode is Packet View. Before you can view decoded
transactions, you must switch from Packet View to Transactions View.
To select Transactions View:
1. Click on the toolbar.
The Trace View screen is re‐drawn to display Transactions.
Figure 5.35: Transactions View
Note: This menu selection displays a check next to Transaction Level when you have selected it. When
you want to switch back to Packet View mode, right‐click anywhere in the trace window and
then left‐click Transaction Level.
Note: This view also shows Extension Transactions, such as the Link Power Management (LPM)
transaction defined by the USB 2.0 LPM specification, as shown below.
Figure 5.36: Link Power Management View