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...@hays.org
