Protocol Analysis
R&S
®
Scope Rider RTH
200User Manual 1326.1578.02 ─ 12
UART Trigger
Selects the trigger type for UART analysis.
"Start Bit"
Triggers on a start bit. The start bit is the first low bit after a stop bit if
polarity is idle high.
"Frame Start"
Triggers on the begin of a data frame. The frame start is configured
with BUS:UART:FRAMemode.
"Data"
Triggers on a serial pattern or data word. You can define the Pattern
and Relation.
"Parity Error"
Triggers on a parity error, which indicates a transmission error. This
trigger type is only available if a parity is configured for the UART bus.
"Stop Error"
Triggers if the stop bit is a logic 0.
"Break Condi-
tion"
Triggers if a start bit is not followed by a stop bit, and the data line
remains at logic 0 for longer than a UART word.
Remote command:
TRIGger:UART:TYPE on page 447
Pattern
Specifies the data pattern to be found on the specified trigger source, in binary or hex
format. Enter the words in MSB first bit order.
See also Chapter 3.6.12.1, "Pattern Definition", on page 70.
Remote command:
TRIGger:UART:DATA on page 448
Relation
Defines how the defined serial data pattern is compared with the acquired signal. The
instrument triggers if the acquired data word is equal or unequal the defined pattern.
Remote command:
TRIGger:UART:DCONdition on page 448
9.4.4 UART Decode Results
This chapter describes the comb display and the decode results table of decoded
UART buses. Basic information on decoding and display of decode results is given in
Chapter 9.1.2, "Decode Results", on page 173.
UART/RS-232/RS-422/RS-485 (Option R&S RTH-K2)
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