Teledyne LeCroy CANbus TD and CANbus TDM - Operators Manual - Manual (Page 37)

Operator's Manual
CANbus-TD-TDM-OM-E RevB
37
Touch Analysis→Pass/Fail Setup to set up pass/fail conditions.
Isolating and Analyzing CANbus Activity
Isolate and Analyze Serial Bus Activity
The combination of Serial Data Triggering, Decoding, and normal oscilloscope features is a
powerful combination of tools that can make it very easy to find latent Serial Data HW or SW
problems in your circuit. No longer is the oscilloscope a tool just for the hardware engineer.
Now the software engineer can also easily visualize the Serial Data signals and relate it to
programming code and operation. The TD options can enable the HW Engineer and SW Engineer
to “speak the same language” when it comes to system debugging and performance checking.
Some common Serial Data analysis needs and methods are discussed below:
Capture Long Pre-Trigger Time
LeCroy oscilloscopes are available with optional very long acquisition memory. For instance, the
WaveRunner Xi Series oscilloscopes can capture up to 12.5 Mpts on 4 channels, or 25 Mpts on 2
channels. If your Serial Data signals are 1 Mb/s, and you sample at the minimum required and
available sample rate (5 MS/s, you would be able to capture 5 seconds of Serial Data traffic. If
you wish, this can be 100% pre-trigger, 100% post-trigger, or something in between.
1. Adjust Pre-Trigger and Post-Trigger time by adjusting the Delay knob on the oscilloscope’s
front panel.