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[aprssig] Mobile Packet Range

Joseph M. Durnal joseph.durnal at gmail.com
Sat Sep 15 19:20:40 UTC 2007


D-Star is great technology, but try putting a D-Star station together
for less than $100!

On 9/15/07, AE5PL Lists <HamLists at ametx.com> wrote:
> This is off-topic from APRS, but I could not let this hearsay go unchallenged.  D-STAR digital voice does, in fact, have equal or greater range than equivalent FM configurations.  The reason is simple: it is a less complex signal occupying a smaller bandwidth.
>
> Unlike AX.25, D-STAR is not packet based.  The DV voice data stream carries forward error correction which overcomes much of the single and multi-bit flutter that will stop an AX.25 UI packet.  I am not promoting D-STAR or disparaging AX.25 here; IMO, both have their uses and place (and yes, I use both daily).  The conclusion you made is apples to oranges and is an incorrect extrapolation of what Bob said to a completely unrelated technology.
>
> 73,
>
> Pete Loveall AE5PL
> pete at ae5pl.net
>
> > From: Ken H>
> > Posted At: Saturday, September 15, 2007 7:14 AM
> > Subject: Re: [aprssig] Mobile Packet Range
> >
> > 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.
>
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