Loading ...
Loading ...
Loading ...
Protocol analysis
R&S
®
MXO 4 Series
307User Manual 1335.5337.02 ─ 05
Data transfer
The data is transmitted in words, also referred to as symbols or characters. Each word
consists of a start bit, several data bits, an optional parity bit, and one or more stop
bits. Several words can form a package, or frame. The end of a package is marked
with a reserved word or by a pause between two words.
[Data8]
[Parity]
Stop[Data7][Data6][Data5]
Data4Data3Data2Data1Data0
Start
Figure 13-8: Bit order in a UART word (symbol)
●
The start bit is a logic 0.
●
The stop bits and the idle state are always logic 1.
The UART protocol has no clock for synchronization. The receiver synchronizes by
means of the start and stop bits, and the bit rate that must be known to the receiver.
Trigger
The R&S MXO 4 can trigger on specified parts of UART serial signals:
●
Start bit
●
Packet start
●
Parity errors, and breaks
●
Stop errors
●
A serial pattern at any or a specified position
13.4.2 UART configuration
13.4.2.1 UART configuration settings
Access: [Apps] key > "Protocol" tab > "UART / RS232" > "Setup".
UART (option R&S MXO4-K510)
Loading ...
Loading ...
Loading ...