So, go take a look at the SERA band plan and see which frequencies are listed for D-STAR simplex that’s also not listed as a repeater input or output. Actually go look for an FM frequency that’s not listed as a repeater input or output as well.
What? You say there aren’t any? 146.52 for FM and nothing for D-STAR? What about the D-STAR repeater frequencies that don’t have D-STAR repeaters? We’ve got repeaters on most of them and will have repeaters on all of them before long. If you want to talk D-STAR simplex on 2M, well, uh, hmmm, that’s a good question! (for the SERA region and in particular Atlanta area) Ed From: dstar_digital@yahoogroups.com [mailto:dstar_digi...@yahoogroups.com] On Behalf Of bruce mallon Sent: Wednesday, April 21, 2010 6:06 AM To: dstar_digital@yahoogroups.com Subject: Re: [DSTAR_DIGITAL] Re: ARRL Field Day Rules - 145.67 simplex Morning Tony That was MY point keep d-star and digital OFF the standard simplex frequencies. NOW we all know that can be a problem SO .... Why not get the ARRL to hold a vote of WHICH frequencies are most used by FM ? Likr here in Tampabay Florida ... We use 146.52 and 147.550 but little is on most others like 146.55, 146.58 .... IF nation wide lets say 146.58 is little used then work things out to put D-Star/digital on that frequency and allow the locals to work things out maybe placing d-star on a back up one in that location ? Lets not see the cat fight that the 200khz wide digital boys started back a few years ago Just my input as a long time 2 meter ham ..... Bruce ( el-87 ) --- On Wed, 4/21/10, Tony Langdon <vk3...@gmail.com<mailto:vk3...@gmail.com>> wrote: From: Tony Langdon <vk3...@gmail.com<mailto:vk3...@gmail.com>> Subject: Re: [DSTAR_DIGITAL] Re: ARRL Field Day Rules - 145.67 simplex To: dstar_digital@yahoogroups.com<mailto:dstar_digital@yahoogroups.com> Date: Wednesday, April 21, 2010, 2:00 AM At 03:30 PM 4/21/2010, you wrote: >WOW- I sure poked an ant bed here, didn't I???? > >My point is DSTAR can operate SIMPLEX, as that is what I thought the >point was for field day. Now assuming we're talking about SIMPLEX, >one could SHARE a SIMPLEX frequency with all the other hams out there. Not without a lot of annoyance for a bunch of reasons. >Hams are a pretty intelligent lot- they passed at least one or two >exams to get an operators Well, some are, some aren't so bright, when it comes to practicalities. The ham exam is like a driving test. A driving test doesn't make you a racing car driver, it just means you (in theory) have enough knowledge to be able to avoid trouble and play nicely with other drivers. The real learning happens AFTER you pass the test. The ham exam is more so, and it has nothing about sorting things out in the real world. We learn that through experience (experimentation, trial and error, etc) and sharing knowledge. >license. Hams are supposed to be resourceful people, as well, aren't >they? I don't know how hard it would be for folks in a local area to >say, as one person here suggested- use a PL tone for all the analog >FM folks- pick something magical, like 100Hz PL tone. Everyone turns >on their PL, and no one has to hear any MSK modulation whatsoever. >The DSTAR folks would run in automatic mode, and could hear the >analog FM operators, and even make contact with them. DSTAR folks >can talk with the other DSTAR folks, as well. OK, problems (or challenges): 1. Disemminating the tone information. How to you get through to all hams, including those who only haul their gear out for Field Day? 2. Those who use various old radios that don't have CTCSS. 3. Mutual interference. You may not hear the D-STAR stations on FM, but they are there and are wiping out the weak station you're trying to work. This sort of mixing modes creates a MASSIVE hidden station effect. Of course, the D-STAR users can set their radio to auto detect, which helps part of the problem, but the FM users don't know the D-STAR ones are there, unless they look at the S meter. 4. In a real emergency, modes would be segregated by whoever is coordinating communications, so they should be segregated on Field Day ("train as you play"). 5. Some people are especially annoyed by different modes "intruding" on their patch. You ARE going to create a bunfight with this one. Unlike the US, Australia (through the WIA) did step in early and add D-STAR to the national band plan, so down here, we know the best parts of the band to play D-STAR on simplex. :) >DSTAR uses FM transmission mode to transmit GMSK (Gausian >Minimum-Shift Keying) signaling. That's like saying 1200bps packet or AFSK RTTY and analog FM are alike (and they're probably more alike than D-STAR and F3E in some ways!). :) >The point is here we need cooperation. Again Field Day is about >getting a message across. And having incompatible modes on the same frequency is NOT the way to do it! :) 73 de VK3JED / VK3IRL http://vkradio. com<http://vkradio.com/>
