Protocol Analysis
R&S
®
RTM20xx
179User Manual 1317.4726.02 ─ 01
Find Level
The instrument analyzes all lines that are configured for the selected bus and sets the
threshold for digitization of analog signals for each channel. If no level can be found, the
existing value remains unchanged, and you can set the thresholds manually in the chan-
nel menu: CH N > "More" (page 2) > "Threshold".
See: "Threshold" on page 31
"Find Level" is not relevant for digital channels (MSO option R&S RTM-B1). Thresholds
for digital channels are set in the "Logic > Threshold" menu.
Remote command:
CHANnel<m>:THReshold:FINDlevel on page 379
11.4.3 UART/RS-232 Trigger
● Triggering on UART/RS-232 Interfaces................................................................179
● UART Trigger Settings..........................................................................................180
11.4.3.1 Triggering on UART/RS-232 Interfaces
Prerequisites: The UART interface is configured. After configuration, the trigger type
"Protocol (UART)" is available. See: chapter 11.4.2.1, "Configuring UART/RS-232 Inter-
faces", on page 176.
Triggers are only available if "Decode" is enabled.
1. Press the SETUP key in the trigger area of the front panel.
2. Select the "Trigger Type": "Protocol (UART)".
3. Press "Source" and select RX or TX as trigger source.
4. Press "Back".
5. Press "Setup".
6. Press the softkey of the required trigger condition:
● "Start Bit", or "Frame Start": next start bit, or first start bit after idle time
● "Symbol<n>": frame number in a data stream
● "Any Symbol": pattern of the data bits anywhere in the data stream
● "Pattern": serial pattern of one, two or three symbols at a defined position in the
data stream
● "Parity Error"
● "Frame Errror"
● "Break"
7. If "Any Symbol" is selected, press the softkey again and define the symbol pattern,
either as binary input, or as hexadecimal input:
UART/RS-232 Interface (Option R&S RTM-K2)
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