Protocol analysis
R&S
®
RTP
577User Manual 1337.9952.02 ─ 12
bytes to define the pattern. For data fields longer than 8 byte, you can define the posi-
tion where the specified pattern starts.
The following example demonstrates how the data pattern and data position is defined.
To set up the search
1. Set the "Source", the signal to be searched: "SerBus". Select the bus that is config-
ured for CAN FD.
2. Set the search criteria:
a) Select the standard: "CAN FD".
b) Select the search type: "Identifier + Data".
3. In this example, the identifier does not matter. Set the "ID type = Any".
4. Define the data setup as described in the example.
Example: Searching for a specific byte anywhere in the frame
The CAN FD frame has 8 or more data bytes, containing at least one data byte with
value = CB anywhere in the data field.
●
Set "DLC ≥ 8".
●
Set the data pattern: "= CB".
13.5.6 Symbolic trigger, decode and search
The R&S RTP can read and apply industry-standard DBC files to the decoded signal
and provides settings for symbolic triggering and symbolic search.
For a description of DBC files, see Chapter 13.5.2.3, "Display settings", on page 561.
13.5.6.1 Symbolic trigger
The "Symbolic" trigger type is available if a DBC label list file is loaded and applied. It
allows you to trigger on a specific data message, or a signal and its value that appears
inside the message.
Access:
1. Press [Protocol].
2. In the "Setup" tab, set "Protocol = CAN/ CAN-FD".
3. In the "Shortcuts" tab, select "Setup trigger".
4. In the trigger dialog, set the "Type" = "Symbolic".
CAN and CAN FD (option R&S
RTP-K3/K9)
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