Teledyne LeCroy CANbus TD and CANbus TDM - Operators Manual - Manual (Page 5)

Operator's Manual
CANbus-TD-TDM-OM-E RevB 5
Introduction
Several communication protocol types are used in automotive applications. They are used to
send data from sensors to electronic control units (ECUs) or from one ECU to another. These
protocol types include Controller Area Network (CAN), Local Interconnect Network (LIN), and
FlexRay. LIN is a low-cost master/slave system designed for low-cost implementation in vehicles,
typically in what is commonly referred to as body electronics. FlexRay is a time-triggered
automotive communications bus designed for higher speeds and fault tolerance.
This manual focuses on the CANbus TDM and TD products. LeCroy also has separate LIN and
FlexRay products and manuals.
Overview
CANbus TDM and TD options contain powerful software algorithms which extract serial data
information from physical layer waveforms measured on your oscilloscope. The extracted
information is overlaid (annotated) on the actual physical layer waveforms, and color-coded to
provide fast, intuitive understanding.
The CANbus TD option allows triggering on CAN Frames and Errors. Frame triggering can be set
to trigger on any frame, one specific Frame ID, a range of Frame IDs, Remote Frames, and Errors.
Frame triggering and data triggering can be done for a single ID or message or a range of IDs and
data by using the conditional trigger capabilities. Other powerful and user-friendly features
included in CANbus TD include:

The ability to trigger and decode CAN at bit rates from 10 kb/s to 1 Mb/s.

The ability to create powerful, conditional Frame ID and Data triggers.

Triggering on CAN protocol errors and remote frames.
If you are unfamiliar or are just learning about CAN, start by using the simplest trigger conditions
(All Frames or Frame ID). Next, experiment with an ID and Data to trigger on a specific value.
Then, try a conditional ID + Data trigger (ID Greater Than or In Range).
The CANbus TDM and TD Serial Data options are unique oscilloscope tools from LeCroy which
greatly increase your ability to debug and analyze embedded controllers that use CAN. The TDM
product include Serial Trigger, Decode and Measure/Graph capabilities, the TD product include
Serial Trigger and Decode.
The CAN trigger is integrated into the oscilloscope - meaning no external hardware is used. It's
selected through the normal oscilloscope trigger menus. CAN signals are sent to the oscilloscope
using a differential probe like the ADP305 or AP033. Decoding is accessed from the Analysis
menu. The decoding is overlaid on top of the appropriate channel, and is intuitively presented
and color-coded for quick understanding. Measurement and graphing capabilities may be
accessed through the Measure/Graph tab in the Decode Setup or from the Measure menu. All