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Protocol analysis
R&S
®
RTO6
578
User Manual 1801.6687.02 ─ 05
3. If the dialog box does not contain a search entry, tap the "Add" icon to create one,
as described in
"To create a user-defined search"
4. Specify search criteria according to
Chapter 13.6.6.1, "Custom Manchester / NRZ
5. To acquire a waveform, press [Single].
The R&S
RTO6 performs a custom serial bus decode according to the thresholds
and protocol settings of the associated serial bus source (here in our example
SB1).
6. To start searching the acquired waveform for specific events, tap "Enable" in the
search setup dialog:
The R&S
RTO6 displays the "Search Results" box that lists the detected events.
For information on how to configure the search results presentation and how to navi-
gate the search results, see also
"To display search zoom windows"
13.7
CAN and CAN FD (option R&S
RTO6-K520)
CAN is the Controller Area Network, a bus system designed by Bosch for use within
automotive network architecture, for example, for brake, power train and engine man-
agement. Today, it is also used in many other systems, for example, in industrial
machines, aerospace, subsea, merchant marine etc..
More than 20 years after the invention of CAN, communication needs have increased,
and CAN has reached it's bandwidth limits in some application fields. Therefore, Bosch
specified an improved CAN protocol with flexible data rate - CAN FD. It introduces a
higher bit rate in the data phase up to 15
Mbit/s and an extended data field from up to
64 bytes.
The R&S
RTO6 provides decoding, triggering and searching CAN and CAN FD signals
with option R&S
RTO6-K520.
13.7.1
The CAN protocol
CAN frame format and in CAN FD frame format can coexist within the same network.
CAN FD shares the physical layer, with the CAN protocol as defined in the BOSCH
CAN Specification 2.0. The frame format is different. There are two new control bits in
the CAN FD frame, the first enabling the new frame format with different data length
coding and the second optionally switching to a faster bit rate after the arbitration is
decided. New CRC polynomials are introduced to secure the longer CAN FD frames.
CAN and CAN FD (option R&S
RTO6-K520)