UART/RS232 Triggering and Serial Decode 29
Keysight InfiniiVision 1200 X-Series and EDUX1052A/G Oscilloscopes User's Guide 315
You can set the UART baud rate from 1.2 kb/s to 10.0000 Mb/s in
increments of 100 b/s.
d Polarity — Select idle low or idle high to match your device under test's state
when at idle. For RS232 select idle low.
eBit Order — Select whether the most significant bit (MSB) or the least
significant bit (LSB) is presented after the start bit in the signal from your
device under test. For RS232 select LSB.
UART/RS232 Triggering
To set up the oscilloscope to capture UART/RS-232 signals, see "Setup for
UART/RS232 Signals" on page 313.
To trigger on a UART (Universal Asynchronous Receiver/Transmitter) signal
connect the oscilloscope to the Rx and Tx lines and set up a trigger condition.
RS232 (Recommended Standard 232) is one example of a UART protocol.
1 Press [Trigger].
2 In the Trigger menu, press the Trigger Type softkey.
In the serial decode display, the most significant bit is always displayed on the left regardless
of how Bit Order is set.
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