Dale, Several of us like to think outside the box, adapt new technologies to existing technologies, enhance communication mediums, and promote Amateur Radio.
Personally, I would like to built a sort of Cross Band Repeater for D*STAR to FM. This would enable information to be passed during a disaster or other event. With HF Bands being so horrendous right now and with Hurricane Season here, I would like to know that if needed. We could transmit information from a field VHF/UHF radio to a base location and patch that person directly into the D*STAR network. Especially if we have critical information to pass. It is all technology and without people thinking outside the box, we wouldn't be where we are today. --- In [email protected], DALE BLANCHARD <wa7...@...> wrote: > > Why can't we keep Dstar digital communications pure digital? > Dale . > > ----- Original Message ----- > From: "John Hays" <j...@...> > To: "dstar digital" <[email protected]> > Sent: Thursday, July 2, 2009 10:52:44 AM GMT -08:00 US/Canada Pacific > Subject: Re: [DSTAR_DIGITAL] Crossband DV to FM Methods > > > > > > > > > > On Jul 2, 2009, at 10:16 AM, Bob Witte K0NR wrote: > > We've got a local D-STAR 70 cm repeater on the air and I am looking > > at approaches to allow access via analog FM users. > > (This is probably a religious issue, so please chill :-) > > I would keep the FM transmissions local and not repeat them out on > > the network. The intent here is to provide a bridging strategy for > > those times when an FM rig happens to be available but a DV rig > > is not. > > > After you have read and considered: > > http://k7ve.org/site/index.php?option=com_content&task=view&id=19&Itemid=26 > http://k7ve.org/site/index.php?option=com_content&task=view&id=28&Itemid=26 > > > > > > > My intent is to have the D-STAR 70 cm repeater crossbanded to > > a 2 Meter simplex frequency. Before I re-invent the wheel, > > I want to find out what other folks have tried. > > > > 1. It seems that the ICOM D-STAR controller is not very flexible > > and it would be quite the hack to interface an FM rig into it. > > Let me know if you've found a reasonable way to do this. > > > > > > There is no audio path in the the Icom D-STAR repeater or controller, > so there is no simple interface for audio in or out of the D-STAR > repeater. (D-STAR stays DIGITAL from end radio to end radio, so there > was no need to include audio/AMBE in the repeater or controller, > though I would have made a different design decision.) > > > 2. My preferred approach at this time is to configure two > > transceivers back-to-back with a controller in between. > > One of the transceivers needs to be a DV rig. > > I found DJ0ABR's web page with some nice work there: > > http://www.dj0abr.de/index_english.html > > > The main concerns here would be to get a legal ID on the analog FM > signal, in the US it only has to ID your (repeater) callsign (see: > http://k7ve.org/site/index.php?option=com_content&task=view&id=30&Itemid=26 > ), and insuring that the D-STAR ID on the D-STAR side is setup > properly: > > UR: CQCQCQ (or maybe something like FM RPT) > RPT1: KY1XYZ B (whatever the repeater is) > RPT2: *Not Used* (be sure no "G"/Gateway is here as that would get > into gateway and onto the D-STAR network) > MY: K0NR (or maybe K0NR R -- for repeater?) > > You probably need to put this in the repeater segment on the FM side > in light of the FCCs recent definition of a repeater ... > http://www.fcc.gov/Daily_Releases/Daily_Business/2009/db0323/DA-09-657A1.pdf > > > > > > 3. The ID-880 has a packet port with a squelch line on it. > > Has anyone checked the behavior of this line in DV mode? > > Does it toggle in response to a decoded DV signal or what? > > This would be a convenient way to connect in but I fear that > > it might just be a carrier operated signal (which might > > still be workable). > > > > I don't know for sure, but its probably COS. > > > > > > 4. Any other ideas? > > > > Thanks in advance, > > > > Bob K0NR > > > > > > ,_._,___ > > John Hays > Amateur Radio: K7VE > j...@... > > > > > [Non-text portions of this message have been removed] >
