Protocol analysis
R&S
®
RTP
552User Manual 1337.9952.02 ─ 12
Make sure that:
●
In the [Protocol] > "Setup" tab:
– The correct "Protocol" is selected.
– The data sources of the serial bus are channel signals.
●
In the "Trigger" > "Setup" tab:
– The "Trigger on" = "Single event"
– The trigger "Source" = "Serial bus".
– The correct "Serial bus" 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.
This trigger type is available, if Packets is enabled.
"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 553.
"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.
UART/RS-232/RS-422/RS-485 (option R&S RTP-K2)
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