Protocol analysis
R&S
®
RTP
555User Manual 1337.9952.02 ─ 12
Column Description
State Decoding state of the word.
"Insuffcient waveform length" indicates that the word 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 the word start (start bit)
Stop Time of the word stop (stop bit)
Tx value Value of the Tx word. The data format is selected in the "Display" tab.
Rx value Value of the Rx word. The data format is selected in the "Display" tab.
Bit rate Value of the bit rate .
Tools
Press "Display settings" in the "Deode Reults" table, to access the "Display" tab.
Remote commands
Remote commands to retrieve decode results are described in Chapter 22.17.5.3,
"Decode results", on page 1613.
13.5 CAN and CAN FD (option R&S RTP-K3/K9)
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 RTP provides decoding, triggering and searching CAN and CAN FD signals
with following options:
●
CAN: option R&S RTP-K3
●
CAN FD: option R&S RTP-K9, requires CAN option R&S RTP-K3
13.5.1 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
CAN and CAN FD (option R&S
RTP-K3/K9)
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