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Greetings;
I have an unusual RS-232 communication issue with a K2, and I'm curious if anyone might have a suggestion.
The K2 sends the "FA" (VFO Freq. A) message as expected when the Port Test is executed from the menu system. However, the K2 does not respond to RS-232 commands from the PC.
I traced the signal through the K2 serial cable, K2IO RS-232 to TTL board, and all the way to Controller Board U6 pin 26 (RxD). The signal is getting there, and looks great on the O-scope; Exactly as a 4800 baud signal should look. This tells me that the PIC 18C452 is getting a good command (electrically speaking), but is simply not responding to the command.
Obviously, I've verified that Port is set to "ON". Are there any other settings, firmware issues, or anything else that I might not be aware of?
It seems very strange that the K2 will send the test message with no problems when the Port Test function is used, but that it won't respond to commands that are getting to the PIC RX Data pin with no issues.
Any help would be greatly appreciated.
Thanks,
Jason
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