Keysight DSOX1202A - UART;RS232 Serial Decode

318 Keysight InfiniiVision 1200 X-Series and EDUX1052A/G Oscilloscopes User's Guide
29 UART/RS232 Triggering and Serial Decode
UART/RS232 Serial Decode
To set up the oscilloscope to capture UART/RS232 signals, see "Setup for
UART/RS232 Signals" on page 313.
For UART/RS232 triggering setup see "UART/RS232 Triggering" on page 315.
To set up UART/RS232 serial decode:
1 Press the [Analyze] key.
2 Press Features; then, select Serial Bus.
3 Press Features again (or push the Entry knob) to enable the serial bus display.
4 Press the Mode softkey; then, select UART/RS232.
5 Press Settings.