User Manual

Protocol Analysis
R&S
®
Scope Rider RTH
161User Manual 1326.1578.02 ─ 08
8 Protocol Analysis
Using the R&S RTH and additional options, you can analyze the following serial proto-
cols:
●
Serial Peripheral Interface (SPI) - requires option R&S RTH-K1
●
Inter-Integrated circuit bus (I²C) - requires option R&S RTH-K1
●
UART / RS-232 / RS-422 / RS-485 interfaces - require option R&S RTH-K2
●
Controller Area Network (CAN) - requires option R&S RTH-K3
●
Local Interconnect Network (LIN) - requires option R&S RTH-K3
The analysis of serial data consists of three main steps:
●
Protocol configuration:
Select the protocol type, and configure the input line as well as the protocol-spe-
cific settings.
●
Decoding:
Select the display format of the decoded data. The digitized signal data is dis-
played 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 "Protocol" mode.
●
Triggering:
You can trigger on various events that are typical for the configured bus type, for
example, on start and stop of messages, or on data patterns.
Analysis is performed on analog input channels. The instrument uses the threshold to
convert the analog signal into a logic signal. If MSO option R&S RTH-B1 is installed,
you can also analyze logic channels.
● Basics of Protocol Analysis...................................................................................161
● I2C (Option R&S RTH-K1).................................................................................... 167
● SPI (Option R&S RTH-K1)....................................................................................175
● UART/RS-232/RS-422/RS-485 (Option R&S RTH-K2)........................................ 181
● CAN (Option R&S RTH-K3).................................................................................. 187
● LIN (Option R&S RTH-K3).................................................................................... 196
8.1 Basics of Protocol Analysis
8.1.1 General Protocol Settings
Access: "Bus" menu
Basics of Protocol Analysis