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[aprssig] Too many digi's ?

Patrick Green pagreen at gmail.com
Sat Oct 21 02:28:07 UTC 2006


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.

Perhaps the thing to concentrate on after the new paradigm is establishing
power recommendations for stations?

73 de Pat --- KA9SCF.

On 10/20/06, Keith - VE7GDH <ve7gdh at rac.ca> wrote:
>
> Bob WB4APR wrote...
>
> > That is another way to do it, but the alt-input digi takes only
> > the setting of the -600 offset at the digi and it's done.
>
> But if this is a single transceiver listening on 144.990 and transmitting
> on 144.390, it would be transmitting blind without listening on 144.390.
> It's a nice idea, but wouldn't it really take two TNCs & two radios to do
> it properly... or at least one TNC & a transceiver on 144.990 / 144.390
> plus a receiver on listening on 144.390 to at least listen to see if the
> frequency was clear? Of course, in busy areas, it may never be clear.
> Perhaps it would be no worse than mobiles transmitting from an RF
> black hole and not knowing that someone the next valley over was
> already beaconing.
>
> 73 es cul - Keith VE7GDH
> --
> "I may be lost, but I know exactly where I am!"
>
>
>
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