Now, if you just want the radio to think it knows where it's at, that is fairly easy. Simply get any pic project board with a serial port on it and set the port to whatever speed the data needs to be ( I forget what the 2820 wants when you send in GPS strings to the back of the radio) and have it send a formated "what appears" to be output from a GPS. The biggest problem will be something that keeps close enough time to not munge things up. Turn off the GPS in the 2820, and I can't recall for sure if you have to feed the data into the back or the front of the radio, but you can certainly feed it into one of those ports.
If you are feeling very wealthy and have plenty of realestate, use a computer to send the data string. A small app to send this information for either Windows or Linux would not be all that hard to write. Dan Thompson [email protected] ----- Original Message ----- From: "Jim Kvochick" <[email protected]> To: <[email protected]> Sent: Saturday, February 20, 2010 10:24 AM Subject: RE: [DSTAR_DIGITAL] Fooling the GPS firmware in an IC2820 to display position data without a GPS sig > Sadly, the radio is buried in a reinforced concrete bunker, and we have > limited feedline access to the outside world. This makes using the GPS > antenna "not attractive". > > Thanks for the comments! > > Jim WB8AZP > >
