Instructions

Table Of Contents
Protocol Analysis
R&S
®
Scope Rider RTH
200User Manual 1326.1578.02 ─ 15
Source
Selects the input channel to which the UART line is connected.
If option R&S RTH-B1 is installed, digital channels can also be used as source.
Remote command:
BUS:UART:SOURce on page 448
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 448
Threshold, Technology, Find Level
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". You can also let the instru-
ment set the appropriate threshold using "Find Level".
Changing the thresholds in the bus configuration changes also the thresholds of ana-
log channels in the "Vertical" menu, or the thresholds of logic channels in the "Logic"
menu.
Remote command:
BUS:UART:TECHnology on page 449
BUS:UART:THReshold on page 449
BUS:SETReflevels on page 431
CHANnel<m>:THReshold:FINDlevel on page 309
UART/RS-232/RS-422/RS-485 (Option R&S
RTH-K2)