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Protocol analysis
R&S
®
MXO 4 Series
276User Manual 1335.5337.02 ─ 05
Before you can analyze a serial signal, the bus has to be configured according to the
protocol and specifics of the signal. The configuration contains:
●
Assignment of the data and clock lines to the input channels
●
Logical thresholds
●
Protocol-specific settings
Serial data can be analyzed in several ways:
●
Triggering: You can trigger on various events that are typical for the selected proto-
col type, for example, on start and stop of messages, or on specified data patterns
in the message.
Triggering on a trigger event sequence is not supported, and holdoff settings are
not available.
●
Protocol decoding: The digitized signal data is displayed on the screen together
with the decoded content of the messages in readable form, and the decode
results are listed in a table.
13.1.1 Setup - general settings
For all protocols, configuration starts with the selection of the serial bus and the proto-
col.
Configuration settings are protocol-specific. They are described in the related chapters.
Make sure that the tab of the correct serial bus is selected.
SB1 /SB2 /SB3 /SB4
Select the correct bus tab before you enter the settings.
Protocol type
Displays the protocol type to be decoded.
Remote command:
SBUS<sb>:TYPE on page 589
State
Enables the decoding of the selected bus. The signal icon of the bus appears on the
signal bar.
Basics of protocol analysis
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