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<DIV>Hi,</DIV>
<DIV> I would like to run this past the aprssig not to cause any fiction but to find out weather this is viable or not</DIV>
<DIV> </DIV>
<DIV>I am not the author of the message but do have his permission to fwd to this group</DIV>
<DIV> </DIV>
<DIV>73 Phillip</DIV>
<DIV>ZL2TZE</DIV>
<DIV> </DIV>
<DIV>ZLAPRS List owner </DIV>
<DIV> </DIV>
<DIV><I>-------Original Message-------</I></DIV></DIV></DIV>
<DIV>
<DIV> </DIV>
<DIV id=receivestrings>
<DIV style="FONT-SIZE: 11pt" dir=ltr><I><B>From:</B></I> <A href="mailto:akld_guy@yahoo.com">akld_guy</A></DIV>
<DIV style="FONT-SIZE: 11pt" dir=ltr><I><B>Date:</B></I> 17/01/2010 2:12:18 p.m.</DIV>
<DIV style="FONT-SIZE: 11pt" dir=ltr><I><B>To:</B></I> <A href="mailto:ZLAPRS@yahoogroups.com">ZLAPRS@yahoogroups.com</A></DIV>
<DIV style="FONT-SIZE: 11pt" dir=ltr><I><B>Subject:</B></I> [ZLAPRS] Fillin digi experiment</DIV></DIV>
<DIV> </DIV>
<DIV>For some time I've been writing an Aprs/packet program that has some novel features, one of which is an implementation of the way I believe a fillin digi should operate.</DIV>
<DIV> </DIV>
<DIV>In the setup, user can specify up to four wide area digipeater callsigns that are the wide area digipeaters that cover his locality.</DIV>
<DIV>Beacons originated by those digipeaters and by the callsigns in the Block List are ignored.</DIV>
<DIV>Beacons to "WIDEN-n" from other stations are stored in buffers, together with their expiry time which is t+15 seconds.</DIV>
<DIV>If the same beacon is heard being digipeated by one of the wide area digipeaters within the 15 second period, the buffer is erased and the frame is not digipeated. If no digipeat is heard, the frame is digipeated and the buffer is erased so it becomes available for another frame.</DIV>
<DIV> </DIV>
<DIV>The results so far are very encouraging. I'm finding that my station almost never digipeats, because the wide digi's hear almost every beacon, but occasionally it does digipeat when they miss a beacon or I fail to hear a digipeat from them (not much harm done in the latter case, and certainly no worse than a standard fillin digi).</DIV>
<DIV> </DIV>
<DIV>The concept should be self-adjusting: stay mostly silent while the wide digi(s) are operating but take over the role if they go off air. The 15 second time period has been chosen to allow a reasonable time for a digipeat from the "big four" on the one hand, and on the other hand get my digipeat out before a second beacon is heard from the same mobile at t+30.</DIV>
<DIV> </DIV>
<DIV>73 de Neil ZL1ANM</DIV>
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