Protocol Analysis
R&S
®
RTM20xx
189User Manual 1317.4726.02 ─ 01
CRC ← Error <type>
CAN uses the Cyclic Redundancy Check, which is a complex checksum 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 calcu-
lated result differs from the received value in the CRC sequence.
Remote command:
TRIGger:A:CAN:CRCerror on page 410
Identifier
Sets the trigger to a specific message identifier or an identifier range.
The first key press enables the "Identifier" trigger type, the second one opens the "Iden-
tifier" menu.
If a label list with node names was loaded and applied in the bus configuration, you can
select simply the "Symbolic ID" from the list instead of entering the numeric identifier.
Remote command:
TRIGger:A:CAN:TYPE on page 407 (ID | IDDT)
Frame type ← Identifier
Data frames and remote frames contain an identifier. Select the frame type to be triggered
on, or select "Data and remote" if the frame type is not relevant.
Remote command:
TRIGger:A:CAN:FTYPe on page 408
Symbolic ID ← Identifier
If a label list with node names was loaded and applied in the bus configuration, you can
select simply the node name from the list instead of entering the numeric identifier.
The instrument trriggers on the identifier of the selected node.
Identifier Setup ← Identifier
Opens the menu to set the identifier pattern. After setting the "ID type" and the "Com-
pare" condition, you can enter the value bit-by-bit by setting the state high, low, or don't
care for each single bit. Alternatively, you can enter a hexadecimal value for each byte.
Remote command:
TRIGger:A:CAN:IDENtifier on page 409
CAN (Option R&S RTM-K3)
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