User manual

Protocol Analysis
R&S
®
RTO
282User Manual 1316.0827.02 ─ 06
10.4.2.2 UART Trigger
The "Events" tab of the "Trigger" dialog box provides the trigger settings for the configured
serial buses.
Make sure that:
●
the trigger sequence is set to "A only"
●
the trigger source is "Serial bus", and the data source(s) of the bus are channel signals
●
the correct serial bus is selected
●
the correct protocol is selected
Type
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.
"Packet start"
Triggers on the begin of a data packet. The frame start is configured
with "Packets" on page 281.
"Data"
Trigger on a serial pattern at a defined position in the data packet. The
pattern can include several subsequent symbols (data frames).
See "Data conditions" on page 283.
"Parity error"
Triggers on a parity error indicating a transmission error. This trigger
type is only available if a parity is configured for the UART bus.
"Break condi-
tion"
Triggers if a start bit is not followed by a stop bit, the data line remains
at logic 0 for longer than a UART word.
"Stop error"
Triggers if the stop bit is a logic 0.
SCPI command:
TRIGger<m>:UART:TYPE on page 680
UART / RS232