Can Totalizer - Agilent Technologies 4000 X-Series User Manual

• Pink vertical bars indicate you need to expand the horizontal scale (and
• Red dots in the decode line indicate that there is data that is not being
• Aliased bus values (undersampled or indeterminate) are drawn in pink.
• Unknown bus values (undefined or error conditions) are drawn in red
• Flagged error frames are drawn in red with an "ERR" label.

CAN Totalizer

The CAN totalizer provides a direct measure of bus quality and efficiency.
The CAN totalizer measures total CAN frames, flagged error frames,
overload frames, and bus utilization.
The totalizer is always running (counting frames and calculating
percentages) and is displayed whenever CAN decode is displayed. The
totalizer counts even when the oscilloscope is stopped (not acquiring
data). Pressing the [Run/Stop] key does not affect the totalizer. When an
overflow condition occurs, the counter displays OVERFLOW. The counters
can be reset to zero by pressing the Reset CAN Counters softkey.
Types of Frames
• Active error frames are CAN frames in which a CAN node recognizes
• A partial frame occurs when the oscilloscope detects any error
Counters
• The FRAMES counter gives the total number of completed remote, data,
• The OVLD counter gives the total number of completed overload frames
• The ERR counter gives the total number of completed active error
Agilent InfiniiVision 4000 X-Series Oscilloscopes User's Guide
run again) to see decode.
displayed. Scroll or expand the horizontal scale to view the information.
with a "?" label.
an error condition during a data or remote frame and issues an active
error flag.
condition during a frame that is not followed by an active error flag.
Partial frames are not counted.
overload, and active error frames.
and their percentage of the total number of frames.
frames and their percentage of the total number of frames.
CAN/LIN Triggering and Serial Decode
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