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Protocol analysis
R&S
®
MXO 5 Series
357User Manual 1802.3369.02 ─ 02
"Form error"
A form error occurs when a fixed-form bit field contains one or more
illegal bits.
"Bit stuffing
error"
The frame segments Start of Frame, Arbitration Field, Control Field,
Data Field and CRC Sequence are coded by the bit stuffing method.
The transmitter automatically inserts a complementary bit into the bit-
stream when it detects five consecutive bits of identical value in the
bitstream to be transmitted. A stuff error occurs when the 6th consec-
utive equal bit level in the mentioned fields is detected.
"Stuff count
error"
A stuff bit error occurs, if more than five consecutive bits of the same
level occur on the bus.
"Ack error"
An acknowledgment error occurs when the transmitter does not
receive an acknowledgment - a dominant bit during the ACK Slot.
"Checksum
error"
CAN uses the Cyclic Redundancy Check, which is a complex check-
sum calculation method. The transmitter calculates the CRC and
sends the result in the CRC sequence. The receiver calculates the
CRC in the same way. A CRC error occurs when the calculated result
differs from the received value in the CRC sequence.
Remote command:
TRIGger:CAN:FORMerror on page 710
TRIGger:CAN:BITSterror on page 711
TRIGger:CAN:FDATa:SCERror on page 710
TRIGger:CAN:ACKerror on page 711
TRIGger:CAN:CRCerror on page 711
CAN (option R&S
MXO5-K520)
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