The information is a bit sketchy on the Alinco website. They sell a digital voice module EJ40U and EJ43U for those radios that uses a different codec but uses the GMSK modem see their website: http://www.alinco.com/faq.html. I do not have the unit so I do not a copy of the schematics to determine if in can be modified to say use a daughter board to support the AMBE-2000 chip as well as a processor to insert the necessary digital header to the transmission and add digital info from the serial port, but the nice thing is that it connects to the speaker and microphone to capture and produce audio after DA process.
On Wed, Jul 8, 2009 at 1:26 PM, Jay Maynard<[email protected]> wrote: > > > On Wed, Jul 08, 2009 at 01:14:36PM -0400, Lazaro Munoz wrote: >> About Alinco, their DR-135, DR-235 and DR-435 mobile rigs have a GMSK >> modem already built in; however they don't obviously have the >> AMBE-2000 chip but there is space (a card slot that is for a on board >> radio TNC option) in the rig to put in a board and hook it up to the >> RS232 port (yes it got one). It even has a separate GPS port (besides >> the RS232 plug in the back). So the technically minded could >> conceivable build their own DSTAR unit using those models as a start. > > Does the GMSK modem have the same parameters as the D-Star GMSK modulation > scheme? If not, how hard would it be to change? It would seem that Satoshi's > D-Star adapter could be fairly easily modified to work with these radios, > with the control interface using the RS-232 connection. > -- > Jay Maynard, K5ZC at K6ZC port B http://www.conmicro.com > http://www.k6zc.org http://www.tronguy.net > http://jmaynard.livejournal.com (Yes, that's me!) > http://www.hercules-390.org >
