Teledyne LeCroy UWBTracer User Manual - Manual (Page 119)

UWBTracer/Trainer User Manual Chapter 8: Decoding WLP Frames and Protocols
LeCroy Corporation
101
Chapter 8: Decoding WLP Frames and
Protocols
8.1 Overview
The WLP protocol defines four types of frames, each identified by a frame type field:
• Data frames
• Standard data frames
• Abbreviated data frames
• Control frames
• Association frames
Data frames can carry high-level protocol data payloads, such as IP, ARP, and TCP.
The LeCroy UWBTracer/Trainer software can decode:
• All the WLP frame types at the WLP level (using the WLP button on the transaction
toolbar)
• IP and ARP Ethernet protocol data units carried inside WLP data frames (using the
WI ETH button on the transaction toolbar)
• TCP and UDP Internet Protocol (IP) protocol units carried inside WLP data frames
(using the WI IP button on the transaction toolbar)
The WLP levels are a special way to decode WiMedia frames, so you cannot expand the
WLP levels.
You can show or hide the full MAC Payload or MAC/PHY headers
(see “Trace Level Views for WLP” on page 53).
8.2 Decoder Script Files
The UWBTracer/Trainer analyzer software uses script files to decode WLP frames. The
script files are read when the application is initialized. Once read, the Analyzer then
decodes WLP frames using script-based decoders.
Script-based decoders are compiled from .dec decoder files, which describe a decoding
program in a C-like language. The .dec files are in the Scripts directory under the
application directory.
Each .dec file stores a decoding routine that is used to decode some kind of recorded
traffic. When the application starts, these files are loaded dynamically.
See Section 3.18 "Directory Structure on Windows XP and Vista" on page 47.