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Protocol analysis
R&S
®
MXO 5 Series
337User Manual 1802.3369.02 ─ 02
For more information on decoding UART, you can also refer to the video, available on
the Rohde & Schwarz YouTube channel: Decoding UART with MXO Series Oscillo-
scope.
13.4.6.1 Configuring UART signals
For configuration, assign the lines to the input channels, and define the active states
and the logical thresholds.
For details on configuration settings, see UART configuration.
1. Tap the "Bus" activator in the bottom right of the screen.
2. Select the tab of the bus that you want to set up, for example "SB1".
3. Tap the "Protocol type" button. Select the protocol: "UART".
4. Tap on "State" to enable the decoding.
An SPI shortcut appears at the bottom left of the screen. Tap on the shortcut for a
quick access to the "UART / RS232" dialog settings.
5. Select the correct channels for each active line: "Tx" and "Rx".
6. Set the "Bit rate".
7. Set the "Data bits". Typical value is 7 or 8.
8. Set the "Stop bits". Typical value is 1.
9. Set the "Parity" to "None", "Odd" or "Even".
10. Set "Bit order" to "MSB" or "LSB first".
11. Set the "Packets".
12. Set the "Timeout".
13. Set the "Polarity" to "Idle high" or "Idle low".
14. Check that the signals are on the screen.
If not try adjusting the vertical and horizontal settings.
UART (option R&S
MXO5-K510)
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