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).
b Parity
— Choose odd, even, or none, based on your device
under test.
c Baud
— 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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