CAN/LIN Triggering and Serial Decode 25
Keysight InfiniiVision 3000T X-Series Oscilloscopes User's Guide 405
• A partial frame occurs when the oscilloscope detects any error condition during
a frame that is not followed by an active error flag. Partial frames are not
counted.
Counters • The FRAMES counter gives the total number of completed remote, data,
overload, and active error frames.
• The SPEC counter gives the total number of Specification errors. This counter
tracks the number of Acknowledge, Form, Stuff, and CRC errors. If a packet has
more than one type of error, that packet will increment the counter by the total
number of errors in the packet.
• The ERR FR counter gives the total number of completed active error frames
and their percentage of the total number of frames.
• The LOAD (bus load) indicator measures the percentage of time the bus is
active. The calculation is done on 330 ms periods, approximately every 400 ms.
Example: If a data frame contains an active error flag, both the FRAMES counter
and the ERR FR counter will be incremented. If a data frame contains an error that
is not an active error it is considered a partial frame and no counters are
incremented.
Interpreting CAN Lister Data
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