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Protocol analysis
R&S
®
MXO 4 Series
335User Manual 1335.5337.02 ─ 05
13.5.4 CAN decode results
When the configuration of the serial bus is complete, the signal can be decoded:
1. Open the "Serial Bus" dialog for the respective bus.
2. In the "Setup" tab, enable "State".
3. In the "Display" tab, enable "Show decode table".
For a description of the display settings, see also Chapter 13.1.3, "Display",
on page 278.
The instrument captures and decodes the signal according to the standard definition
and the configuration settings.
The color-coding of the various protocol sections and errors simplifies the interpretation
of the visual display. The decode information condenses or expands, depending on the
horizontal scale. Various data formats are available to show the result values.
Green
= Identifier
Bright Green = DLC
Orange = Data
Blue = CRC (checksum)
Purple = End of frame
Red = Error occurred
The "Decode results" box shows the detailed decoded data for each word.
Table 13-5: Content of the Decode results table
Column Description
"Index" Number of the decoded frames
"State" Overall state of the frame.
"Insuffcient waveform length" indicates that the frame is not completely contained
in the acquisition. Change the horizontal scale, or move the reference point to the
left to get a longer acquisition.
"Start" Time of frame start
CAN (option R&S MXO4-K520)
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