On Sunday, September 23, 2018 at 6:09:27 PM UTC-5, wrote:
Thank you. I will try upgrading the software but my problem is I don’t have an IPAC. The previous owner must have. All I have is the 302 and a computer. I would like to wipe the data in the 302 clean and start the set up from the beginning factory default.
Gene

First, IMHO, the C302 is a wonderful audio vario - I have one in my '27. Sorry that I don't have an answer to your question - it has been years since using its serial port.

But about wiping the data - you may find some useful information about this (and other things) at http://aviation.derosaweb.net/cambridge/ under the "Cambridge 302 Logging Errors" section.

Best of luck, John OHM Ω