314 Keysight InfiniiVision 1200 X-Series and EDUX1052A/G Oscilloscopes User's Guide
29 UART/RS232 Triggering and Serial Decode
6 Press the Signals softkey to open the UART Signals menu.
7 For both the Rx and Tx signals:
a Connect an oscilloscope channel to the signal in the
device under test.
b Press the Rx or Tx softkey; then, turn the Entry knob to
select the channel for the signal.
c Press the corresponding Threshold softkey; then, turn the
Entry knob to select the signal threshold voltage level.
The threshold voltage level is used in decoding, and it will
become the trigger level when the trigger type is set to
the selected serial decode slot.
The RX and TX labels for the source channels are
automatically set.
8 Press the Back key to return to the Analyze menu.
9 Press the Bus Config softkey to open the UART Bus Config
menu.
Set the following parameters.
a#Bits — Set the number of bits in the UART/RS232 words
to match your device under test (selectable from 5-9 bits).
bParity — Choose odd, even, or none, based on your device
under test.
cBaud — Press the Baud Rate softkey, then press the Baud
softkey and select a baud rate to match the signal in your
device under test. If the desired baud rate is not listed,
select User Defined on the Baud softkey; then, select the
desired baud rate using the User Baud softkey.
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