Rohde & Schwarz RTE - The UART; RS232 Interface; UART;RS-232;RS-422;RS-485 (Option R&S RTE-K2)

Protocol analysis
R&S
®
RTE
551User Manual 1326.1032.02 ─ 20
The "Show search zoom windows" function allows you to analyze the search results in
more detail. Search zoom and result table are synchronized; if you select a row in the
result table, this result is shown in the search zoom.
For an introduction to search results, see:
●
Chapter 11.1.2, "Search results", on page 446
●
Chapter 11.4, "Result presentation", on page 463
Remote commands are listed in Chapter 18.17.4.5, "SPI search results",
on page 1474.
13.4 UART/RS-232/RS-422/RS-485 (option R&S RTE-K2)
13.4.1 The UART / RS232 interface
The Universal Asynchronous Receiver/Transmitter UART converts a word of data into
serial data, and vice versa. It is the base of many serial protocols like of RS-232. The
UART uses only one line, or two lines for transmitter and receiver.
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 13-9: Bit order in a UART word (symbol)
UART/RS-232/RS-422/RS-485 (option R&S RTE-K2)