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Agilent InfiniiVision 3000 X-Series Oscilloscopes 
User's Guide
 
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UART/RS232 Triggering and Serial 
Decode
Setup for UART/RS232 Signals 407
UART/RS232 Triggering 409
UART/RS232 Serial Decode 411
UART/RS232 triggering and serial decode requires Option COMP or the 
DSOX3COMP upgrade.
Setup for UART/RS232 Signals
To set up the oscilloscope to capture UART/RS232 signals:
1 Press  [Label] to turn on labels.
2 Press  [Serial].
3 Press the Serial softkey, turn the Entry knob to select the desired slot 
(Serial 1 or Serial 2), and press the softkey again to enable decode.
4 Press the Mode softkey; then, select UART/RS232 trigger type.
5 Press the Signals softkey to open the UART/RS232 Signals Menu.