I really do not see a problem with D-Star repeaters existing with analog as long as D-Star follows the analog band plans set forth by the repeater councels. D-Star is narrow bandwidth and for this reason see they can put more repeaters in less space.
A problem of say putting 2 D-Star repeaters on say one analog repeater channel space with each D-Star next to one another would cause ajacent interference for the 2 together would be wider. It does seem D-Star in some areas is branching out on their own for repeater assignments and operation. A D-Star is another repeater and it is using RF just like the analog, but with different modulation. Being in repeater coordination in the past I have seen that often a council must guide other modes for often these modes see themselves as different and often work outside the normal tested loop. 73, ron, n9ee/r >From: [EMAIL PROTECTED] >Date: 2007/09/01 Sat PM 06:03:39 CDT >To: [email protected] >Cc: [email protected], [EMAIL PROTECTED], [EMAIL PROTECTED] >Subject: Re: [Repeater-Builder] [Fwd: DStar Channel Spacing] > >At 9/1/2007 12:14, Nate Duehr wrote: > >>Bob, since the discussion has been happening on the D-Star list >>([EMAIL PROTECTED]) -- many people on the RB list and maybe >>IllinoisDigitalHam may not be aware that there's been some investigation >>into how D-Star repeaters that are co-channeled behave. >> >>You may want to hop over to the D-Star list and look over the archives >>for the full discussion. > >Just what I need, another mailing list to follow. I'm having enough >trouble keeping up on my current subscriptions. > >>My understanding of it is this: > >For clarification, I don't have any D-Star equipment myself. My interest >as a frequency coordinator is to make sure that new modes get the spectrum >they need. > >W.r.t. the co-channel issue you raise, it clearly looks to me to be a >design flaw in the protocol. I doubt that we would consider increasing the >co-channel spacing for D-Star systems beyond that which is used for analog >repeaters. In fact, I'd expect D-Star to be somewhat more tolerant of >on-channel interference because of the error correction. > >Bob NO6B > > Ron Wright, N9EE 727-376-6575 MICRO COMPUTER CONCEPTS Owner 146.64 repeater Tampa Bay, FL No tone, all are welcome.
