Protocol Analysis
R&S
®
Scope Rider RTH
198User Manual 1326.1578.02 ─ 12
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 444
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 444
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 445
BUS:UART:THReshold on page 445
BUS:SETReflevels on page 427
CHANnel<m>:THReshold:FINDlevel on page 304
UART/RS-232/RS-422/RS-485 (Option R&S
RTH-K2)
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