User manual

Protocol Analysis
R&S
®
Scope Rider RTH
132User Manual 1326.1578.02 ─ 04
Remote command:
BUS:UART:SOURce on page 224
Polarity
Defines the logic states of the line. In idle high state, the idle state corresponds to a
logic 1, and the start bit to a logic 0. In idle low state, the idle state corresponds to a
logic 0, and the start bit to a logic 1. During idle time, no data is transmitted.
Remote command:
BUS:UART:POLarity on page 224
Threshold / Technology
Sets the threshold value for digitization of signals. If the signal value is higher than the
threshold, the signal state is high. Otherwise, the signal state is considered low. The
interpretation of high and low is defined by the Polarity.
You can select the threshold voltages for various types of integrated circuits in the
"Technology" list, or set a user-defined value in "Threshold".
Remote command:
BUS:UART:THReshold on page 224
Predefined Bit Rates / Bit Rate
Set the number of transmitted bits per second.
You can select a predefined value in the "Predefined Bit Rates" list, or set a user-
defined value in "Bit Rate".
Remote command:
BUS:UART:STDBitrate on page 224
BUS:UART:BITRate on page 225
Data Bits
Sets the number of data bits in a word (symbol) in a range from 5 bits to 9 bits.
Remote command:
BUS:UART:SSIZe on page 225
Parity
Defines the optional parity bit that is used for error detection.
"None"
No parity bit is used.
"Odd"
The parity bit is set to "1" if the number of data bits set to "1" is even.
"Even"
The parity bit is set to "1" if the number of data bits set to "1" is odd.
Remote command:
BUS:UART:PARity on page 225
Stop Bits
Sets the number of stop bits: 1 or 1.5 or 2 stop bits are possible.
Remote command:
BUS:UART:SBIT on page 225
UART/RS-232/RS-422/RS-485 (Option R&S
RTH-K2)