Rohde & Schwarz RTE Series - Page 571

Protocol analysis
R&S
®
RTE
571User Manual 1326.1032.02 ─ 20
"DLC, NDB"
"DLC" sets the Data Length Code, which defines the number of data
bytes to be found.
"NDB" shows the number of data bytes that is set by the DLC. DLC
and NDB are different in CAN FD for DLCs > 8.
CAN:
For Big Endian transfer direction, you can trigger on a number of
bytes less than the data length of the frame, that means, on the first
bytes that are transmitted. For Little Endian transfer direction, the
exact number of data bytes in the frame must be set.
Example: The data word to be sent is 12 34 56, and it is sent little
endian by the LIN node. With Data length ≥ 2 and Transfer = Big
endian, you trigger on the data of the first two bytes, that is 56 34.
With Data length = 3 and Transfer = Little endian, you trigger on the
required data word 12 34 56.
CAN FD:
The data field can have up to 64 bytes, the DLC is defined in the
standard. For example, DLC = 9 defines that the data field has 12
bytes, and DLC = 15 sets a 64 byte data field.
"Condition"
Sets the operator to set a specific data pattern ("Equal" or "Not
equal") or a data range.
"Data min"
Defines the data pattern. The pattern length is adjusted to the DLC
setting (and vice versa). Enter the pattern MSB first and with big
endian byte order.
In binary format, use the following characters: 1; 0; or X (do not care).
To enter the pattern in other formats use the bit pattern editor, see
Chapter 13.1.5, "Bit pattern editor", on page 521.
"Data max"
The second data pattern is required to specify a range with conditions
"In range" and "Out of range".
Remote command:
TRIGger<m>:CAN:BORDer on page 1497
TRIGger<m>:CAN:DCONdition on page 1496
TRIGger<m>:CAN:DMIN on page 1497
TRIGger<m>:CAN:DMAX on page 1497
TRIGger<m>:CAN:DLCCondition on page 1497
TRIGger<m>:CAN:DLC on page 1498
TRIGger<m>:CAN:NDBYtes? on page 1498
Data position
The data position sets the location in the data field where the instrument looks for the
specified data pattern.
The setting is available in CAN FD option R&S RTE-K9.
The position can be defined if the data field of the frame is longer than 8 bytes - if DLC
≥9.
"Position"
Sets the operator to define an exact position ("Equal") or a data
range.
Use "Any", if the data position is not relevant for the trigger condition.
CAN and CAN FD (option R&S RTE-K3/K9)