User Manual

Protocol Analysis
R&S
®
Scope Rider RTH
197User Manual 1326.1578.02 ─ 08
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Master sends a message header including the synchronization break, the synchro-
nization byte, and the message identifier.
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The identified node sends the message response: one to eight data bytes and one
checksum byte.
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Header and response form the message frame.
The data is transmitted in bytes using the UART byte-word interface without the parity
bit. Each byte consists of a start bit, 8 bits and a stop bit.
Figure 8-20: Structure of a byte field
Data bytes are transmitted LSB first.
The identifier byte consists of 6 bits for the frame identifier and two parity bits. This
combination is known as protected identifier.
Trigger
The R&S RTH can trigger on various parts of LIN frames. The data line must be con-
nected to an input channel, triggering on math and reference waveforms is not possi-
ble.
You can trigger on:
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Frame start (synchronization field)
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Specific slave identifier or identifier range
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Data pattern in the message
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Wake up signal
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Checksum error (error in data), parity error (error in identifier)
8.6.2 LIN Configuration Settings
Access: PROTOCOL > "Bus type" = "LIN" > "Configuration"
LIN (Option R&S RTH-K3)