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[aprssig] Mobile Packet Range

Ken H> sailingtoo at gmail.com
Sat Sep 15 13:57:28 UTC 2007


Thanks for the info Pete, you certianly haev a LOT more info that I do about
D-Star.  I was only repeating what I had been told by one of the folks
involved in the south MS D-Star - that they were disappointed in the range
compared to expectations.

I stand corrected.

Ken H>


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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