--- In Repeater-Builder@yahoogroups.com, Nate Duehr <n...@...> wrote: > > > I like D-STAR as a not-very-well-designed "first try" and use it... but it's > seriously technologically flawed. Some of that can be fixed... other things > like the header information not being interlaced... > > -- > Nate Duehr, WY0X > n...@... >
Hmmm... I'm sitting here with my NQMHS Node Adapter (GMSK Modem) and watching the binary stream, in both Hex and Char, off of my IC-91AD, while transmitting for a few seconds. It seems the callsign information is repeated on a pretty continuous basis looking at the trace. I think it may just be a repeater/gateway control implementation issue. It seems to me, that almost everywhere I go (and I have traveled extensively), if all of the repeater pairs are coordinated, most of them have essentially zero traffic on them and sometimes one individual or organization holds many pairs covering essentially the same geography. Why not convert or replace some of those analog machines? Conversion runs less than $150 if you are going to run without Internet connectivity, add a computer and router to the price for Internet connectivity. I can tell you with certainty that having D-STAR (or most digital voice modes) on the same repeater with analog users is impractical in amateur radio. Many, if not most hams, don't even use CTCSS on their radio's squelch and even if they did the squelch can be falsed by the digital signal. We have a D-STAR repeater in the Seattle area (atop a 42 story building) and it is on a Shared Non-Protected pair on 2 meters. The sync pattern at the beginning of transmissions will open the squelch on CTCSS squelched radios (100 hz.) at 60+ miles away (for users of another FM only SNP repeater in Port Angeles). Listening to the structured "noise" of a GMSK digital signal on your analog radio is not an activity one would want to undertake for any extended period. 73 de K7VE NW7DR - experimental D-STAR access point simplex and duplex.
