[aprssig] Mobile Packet Range

[Ken H>]

Thanks for the info Bob - I remembered reading that and wondered if it were
still true.  I guess that's why they are finding that D-Star doesn't have
the range first promised?  At a D-Star seminar last yr there were saying the
D-Star range would be greater than a comparable voice FM repeater, but I am
hearing lately they are finding that not to be true... range is a good bit
less.

Ken H>


On 9/15/07, Bob Bruninga <bruninga at usna.edu> wrote:
>
> > I'm running 10 watts of power on voice,
> > but 50 watts of power on APRS.  I started
> > using only 10 watts, but didn't get to the
> > Igate very often, so upped the power to
> > 50 watts and that helped some.
>
> The APRS rule of thumb is that the range of mobile packet is at least half
> or less than voice.  Reason is simple.  Ears can ignore a millisecond of
> flutter, packets cannot.
>
> That is why the standard for PHG range circles displayed on APRS maps were
> cut in half back around 1998 or so when substantial experience proved this.
>
> Bob, WB4APR
>
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