Jim, There is something up that isn't being said here. I have never seen a GPS that did not require an antenna. It may be external or in most cases nowdays built right into the unit itself. Any way that you look at this you have an antenna that needs to see the sky, and you have to have a serial cable of some sort coming back to the radio to feed it with data from the GPS. What difference does it make if that is a serial cable or an antenna wire? Now, if you are thinking about using something like a bluetooth enabled gps externally to "cut the wire" now you have a legitimate question. There are some other problems with this, (like the third harmonic of the UHF band and a radio system with no frontend ie: bluetooth).
Dan Thompson d...@waycom.com ----- Original Message ----- From: "Jim Kvochick" <k...@att.net> To: <dstar_digital@yahoogroups.com> 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 > > > -----Original Message----- > From: dstar_digital@yahoogroups.com [mailto:dstar_digi...@yahoogroups.com] > On Behalf Of Daniel G. Thompson > Sent: Friday, February 19, 2010 2:35 PM > To: dstar_digital@yahoogroups.com > Subject: Re: [DSTAR_DIGITAL] Fooling the GPS firmware in an IC2820 to > display position data without a GPS sig > > > Jim, > > If you can run a cable to the radio from a GPS why can't you run the > little > tiny wire for the GPS antenna ?? The radio comes (if you buy the DStar > ready one) with a 20+ foot cable attached to the GPS antenna. So my > question > is, if you can get a serial cable to the radio, why not just make the the > cable the gps antenna cable so that you can use the features? > > Dan Thompson > d...@waycom.com > > ----- Original Message ----- > From: "jkvochick" <k...@att.net> > To: <dstar_digital@yahoogroups.com> > Sent: Friday, February 19, 2010 11:09 AM > Subject: [DSTAR_DIGITAL] Fooling the GPS firmware in an IC2820 to display > position data without a GPS sig > > >>I have a 2820 installed in a place where receiving a GPS signal would >>be very, very, difficult. >> >> Sadly, without receiving a valid GPS signature, some of the other cool >> features, like distance to station doesn't work. >> >> Since this radio is installed in a fixed location, I was wondering if >> you could inject an appropriate rs232 signal from say an Arduino >> microprocessor board, so that the internal units believed they had >> valid psiiton data? >> >> Jim WB8AZP >> >> >> >> >> ------------------------------------ >> >> Please TRIM your replies or set your email program not to include the >> original message in reply unless needed for clarity. ThanksYahoo! >> Groups Links >> >> >> >> > > > > ------------------------------------ > > Please TRIM your replies or set your email program not to include the > original message in reply unless needed for clarity. ThanksYahoo! Groups > Links > > > > > > ------------------------------------ > > Please TRIM your replies or set your email program not to include the > original message in reply unless needed for clarity. ThanksYahoo! Groups > Links > > > >
