The signals go from the processor to an RS-232 tranceiver, so the signals should be operating at the RS-232 voltage levels which also inverts the signals. You should be able to connect one of the supplied DB9 adapters to UARTB (J25 on the baseboard) and connect it to a PC.
I am not sure what operating system you're using, but we have an example of how to do that with Linux in our software test plan:
http://support.logicpd.co...talid=0&EntryId=1400 If you want the levels generated from the processor (which are lower voltage and inverted from the tranceiver does), look at J33 pins 13,15,17 and 19
Does that answer your question?
adam