Outside of most metro areas, APRS is RF horizon challenged but as traffic gets more dense, stations ends transmitting on top of each other. Think about a scenario if every car had APRS in it. Aloha circles would be in blocks instead of miles. Dual receive sounds like a better step but it raises the complexity. Sometimes you can't do this at the mountain digi because of logistics.
<br><br>Perhaps the thing to concentrate on after the new paradigm is establishing power recommendations for stations?<br><br>73 de Pat --- KA9SCF.<br><br><div><span class="gmail_quote">On 10/20/06, <b class="gmail_sendername">
Keith - VE7GDH</b> <<a href="mailto:ve7gdh@rac.ca">ve7gdh@rac.ca</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Bob WB4APR wrote...
<br><br>> That is another way to do it, but the alt-input digi takes only<br>> the setting of the -600 offset at the digi and it's done.<br><br>But if this is a single transceiver listening on 144.990 and transmitting
<br>on 144.390, it would be transmitting blind without listening on 144.390.<br>It's a nice idea, but wouldn't it really take two TNCs & two radios to do<br>it properly... or at least one TNC & a transceiver on 144.990
/ 144.390<br>plus a receiver on listening on 144.390 to at least listen to see if the<br>frequency was clear? Of course, in busy areas, it may never be clear.<br>Perhaps it would be no worse than mobiles transmitting from an RF
<br>black hole and not knowing that someone the next valley over was<br>already beaconing.<br><br>73 es cul - Keith VE7GDH<br>--<br>"I may be lost, but I know exactly where I am!"<br><br><br><br>_______________________________________________
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