[aprssig] Help with Interfacing a GPSto Kantronics KPC-3
Stephen H. Smith
wa8lmf2 at aol.com
Wed Jan 3 16:16:59 EST 2007
john.maetta at boeing.com wrote:
> Hi Bob,
>
> Thanks for the reply. I have yet to hook a transmitter up to the KPC-3.
> So 'On the Air' testing has not been tried yet.
> I am trying to get the basics working first, then I'll interface the
> KPC-3 to my transceiver. What I wanted to see was the Xmit LED
> illuminate every 10 and 20 seconds to demonstrate that my system is
> working.
>
> 73
>
> John N6VMO
>
>
>
The transmitting of raw NMEA strings over the air in routine APRS
beacons is highly discouraged in California. Raw NMEA strings occupy up
to TEN times more air time than the most compact encoding format for
APRS (Mic-E); a luxury we can ill-afford on the overloaded 144.39
frequency in most of California. Real-time off-the-air channel
loading data for southern Cal is here:
< http://webs.lanset.com/wa8lmf/uitraffic/trafficlive.htm >
If you want to run a transmit-only "dumb tracker" consider using a
TinyTrack < http://byonics.com > or Opentracker <
http://n1vg.net/opentracker > instead. Both these approx $35 kits
transmit far shorter strings than an ordinary TNC in tracker mode and
are smaller, lighter and consume less power than a full TNC. Not to
mention saving an expensive $200+ TNC for more elaborate
transmit/receive applications at a home station.
--
Stephen H. Smith wa8lmf (at) aol.com
EchoLink Node: 14400 [Think bottom of the 2M band]
Home Page: http://wa8lmf.com --OR-- http://wa8lmf.net
NEW! TNC Test CD
http://wa8lmf.net/TNCtest
JavAPRS Filter Port 14580 Guide
http://wa8lmf.net/aprs/JAVaprsFilters.htm
"APRS 101" Explanation of APRS Path Selection & Digipeating
http://wa8lmf.net/DigiPaths
Updated "Rev G" APRS http://wa8lmf.net/aprs
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