From: Charles E. Gelm (pfwixj.grullzso@olin.edu)
Date: Mon Jan 08 2001 - 02:22:50 EET
Hi, Chris:
It sounds to me like you are looking for software or firmware.
Software/firmware does the broadcasting.
Sending radio signals over variable terrain is less affected
by modulation [digital, cw, am, fm] than it is by hardware
[power, elevation(30MHz and above), antenna gain].
You cannot be heard on the other side of a mountain by
changing your modulation scheme.
For broadcasting of data, look up A.P.R.S.
(Amateur Position Reporting System) and weather-node.
These digital schemes broadcast data and can display
data from other 'nodes.
HTH, Chuck
Chris Leishman wrote:
>
> Hi all,
>
> I'm looking at doing some work with packet radio for a comm's system I'm
> prototyping (potentially for a post grad project) - and I was wondering if
> people could suggest appropriate hardware (or tell me if I'm on the wrong
> track).
>
> Basically I'm looking for something to enable broadcasting of data to any
> other node in >10km radius over variable terain (preferably not
> just line-of-sight stuff). Bandwidth does not have to be large. Hopefully
> something that works with linux/AX.25. It also needs to be mobile - on both
> land and in the air.
>
> Does anyone know of something that might be suitable?
>
> Regards,
>
> Chris
>
> ------------------------------------------------------------------------
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