User manual

Protocol Analysis
R&S
®
RTO
253User Manual 1316.0827.02 ─ 06
Binary bit order
Select MSB or LSB to define the data bit order in the display of the decoded signal. The
setting is only available for the binary data format.
Binary bit group size
Sets the number of bits that forms a bit group in the display. The setting is only available
for the binary data format.
10.1.3 Protocol Translation Tables
For all protocols using ID identification of the bus nodes, it is possible to create protocol
translation files containing node IDs, a name for each node (ID Name), and some pro-
tocol-specific information. You can load protocol translation files, edit the names and
activate its usage for decoding. As a result, an additional "Label" column appears in the
"Decode results" table, containing the ID Name. The display of the decoded signal shows
the ID name instead of the ID value so it is easy to identify the messages of the different
bus nodes.
10.1.3.1 Content and Format of the PPT File
The PTT file format is an extension of the CSV format (Comma Separated Values). You
can edit it with standard editors, for example, Excel or a text editor.
The PTT file has three types of lines:
●
Comment lines begin with a hash character #. A hash character at any other position
in the line is treated like a standard character.
●
Command lines begin with a commercial at character @. An @ character at any other
position in the line is treated like a standard character.
●
Standard lines are the lines that not qualify as comment or command lines. They build
the core of the translation table.
Command lines
Command lines define the version of the PTT file and the protocol name:
●
@FILE_VERSION: must appear exactly once in the file
●
@PROTOCOL_NAME: must appear at least once in the file. Thus one file can contain
several translation tables for different protocols.
# --- Start of PTT file
@FILE_VERSION = 1.0
@PROTOCOL_NAME = i2c
[... Translation table for I2C]
@PROTOCOL_NAME = can
Basics of Protocol Analysis