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Serial bus analysis
R&S
®
RTA4000
250
User Manual 1335.7898.02 ─ 08
13
Serial bus analysis
Using the R&S
RTA4000 and additional options, you can analyze the following serial
protocols:
●
SPI no CS (Serial Peripheral Interface with 2 lines) and SPI with CS (Serial Periph-
eral Interface with 3 lines) - requires option R&S
RTA-K1
Chapter 13.2, "SPI bus (option R&S
●
I²C (Inter-Integrated Circuit bus) - requires option R&S
RTA-K1
Chapter 13.3, "I²C (option R&S
●
UART/RS232 (EIA-232 serial interface) - requires option R&S
RTA-K2
Chapter 13.4, "UART / RS232 (option R&S
●
CAN (Controller Area Network) - requires option R&S
RTA-K3
Chapter 13.5, "CAN (option R&S
●
LIN (Local Interconnect Network) - requires option R&S
RTA-K3
Chapter 13.6, "LIN (option R&S
●
Audio Signals - requires option R&S
RTA-
Chapter 13.7, "Audio signals (option R&S
●
MIL-1553 - requires option R&S
RTA-
Chapter 13.8, "MIL-STD-1553 (option R&S
●
ARINC 429 - requires option R&S
RTA-
Chapter 13.9, "ARINC 429 (option R&S
To analyze parallel buses, you need MSO option R&S
RTA-B1 to get the logic chan-
nels. See
Chapter 15, "Logic analyzer (option R&S
13.1
Basics of protocol analysis
The analysis of serial data consists of the following main steps:
●
Protocol configuration:
Select the protocol type, configure the input lines and the protocol-specific settings.
●
Decoding:
Select the display format of the decoded data. The digitized signal is displayed on
the screen together with the decoded content of the messages in combs. You can
scale the signal display and zoom into it to see it in more detail.
You can also list the decoded results in tabular form in the bus table.
●
Triggering:
You can trigger on various events that are typical for the configured bus type. For
example, trigger on start or stop of messages, or on serial patterns.
●
Search:
On CAN and LIN buses, you can search for events. The search events are similar
to the trigger events. The search finds all matching events in an acquisition, while
the trigger finds only the trigger event.
Basics of protocol analysis