[aprssig] Fill-in Digis

Robert Bruninga bruninga at usna.edu
Fri Mar 24 16:25:17 CST 2006

Yes, WIDE1-1,WIDE2-2 is a 3 hop path used by mobiles.
Most busy areas only recommend 2 hops (WIDE1-1,WIDE2-1).
An initial WIDE1-1 should never be used by fixed stations.

>>> Ron Stordahl <ron.stordahl at digikey.com> 03/24/06 12:11 PM >>>
The Fill-in digi concept seems like a good one.  In view of this 
shouldn't the recommendations for an N=3 area be changed to 
"WIDE1-1,WIDE2-2" rather than "WIDE3-3".  And at the same time shouldn't 
the high digi's configured with the new paradigm also restrict WIDE3-3?  
If not then this opens the option "WIDE1-1,WIDE3-3" which violates the 
goal of N=3.

Ron Stordahl, N5IN

Curt, WE7U wrote:
> On Fri, 24 Mar 2006, Robert Bruninga wrote:
>> The Fill-in digi attempts to better balance that
>> situation.  THink of the tier of out-lying fill-in
>> digis as just like a big voice repeater with remote
>> site receivers.
> That is _exactly_ how I think of it!
> That's pretty much how it works for my mobile.  With all the canyons
> and hills/mountains around, we need these fill-in digi's in order to
> provide better coverage for the mobiles/portables around here.
> Another option is to run high-power from the mobiles.  That can help
> the one individual to a point, but trashes everybody else on channel
> that _might_ have gotten in otherwise.  Unfortunately the gains by
> running high power are difficult to refute, so it takes a bunch of
> education to get those users to back down again.  I was one of them
> a few years back until I "saw the light".
>> 2) But he hears the digi just fine at the same
>> distant location.
> The mobile can't always hear as well as it talks, due to vehicle
> electrical system noise, computer noise, etc.  I find that I can
> hear quite well if the engine is off, but not otherwise.  Perhaps
> its just my particular installation though and others have better
> luck while moving.  A sample of one is hard to do statistics on.
> --
> Curt, WE7U.   APRS Client Comparisons: http://www.eskimo.com/~archer 
> "Lotto:    A tax on people who are bad at math." -- unknown
> "Windows:  Microsoft's tax on computer illiterates." -- WE7U
> "The world DOES revolve around me:  I picked the coordinate system!"
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