Teledyne LeCroy USB Chief - Users Manual - Manual (Page 99)

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Chief User’s Manual CATC Version 1.7
The Error Summary details all errors analyzed throughout the Trace recording.
• Navigate to an error within the recording by clicking the number of the packet
containing the error.
• Use the arrows to cycle though each occurrence of a particular error.
Babble Errors
While most of the errors reported in an Error Summary are self-evident, Babble
Errors warrant special mention. Failures can occur if a device on the bus doesn’t
end its transmission before the end of the frame, or if it continues to drive a
constant J or K state on the bus with no end of packet (EOP).
• The Babble Start error identifies packets that began too late to be completed
within the frame and illegally ran over into the following frame.
• The Babble End error identifies packets that didn’t have an EOP and therefore
caused a loss of activity (LOA).