On 10/25/2019 2:23 PM, Scott Brown kd4ydd@... [ui-view] wrote:
Hi all,
Has anyone heard or seen of this?
I am using UI-View32 and a KPC-3 as an iGate. Recently, something has either
changed or gone rogue on me.
My beacons and status text seem to being delay/saved up and then all sent as
a very long packet at random intervals. Looks like roughly every 30 minutes.
I've been pulling my hair out for a few days. Any help would be greatly
appreciated!
Regards,
-Scott
KD4YDD
The KPC-3 is notorious for this.牋 This is an issue that had been going on for
DECADES,� with Kantronics denying there is a problem since forever!牋牋牋 The
only known fix (other than not using a KPC3) is to power-cycle the KPC3 every
few hours.
The most severe manifestation of this problem is with APRS balloon launches. 牋
Typically a balloon at altitude will be heard by numerous igates over a radius
of hundreds of miles simultaneously. � � Several igates will pass the received
beacon to the Internet more-or-less instantly.� The usual APRS-IS dupe-reject
mechanism works. � Then a long-delayed packet from an earlier beacon reaches
the Internet via a KPC3 igate late enough that the dupe algorithm thinks it's a
new packet and accepts it.
The result is the balloon track on APRS maps does the cha-cha-cha moving
forward, then back, then farther forward, than� back again endlessly.� I call
this phenomenon "hyperjumping".牋� It is such a problem that some balloon
groups now don't operate on the normal 144.39 channel but rather on an
alternate channel where they can control what TNCs are doing igate duty.
-------------------------------------------------------------------------------
Stephen H. Smith牋� wa8lmf (at) aol.com
Skype:牋牋牋� WA8LMF
EchoLink:� Node #� 14400� [Think bottom of the 2-meter band]
Home Page:牋牋牋牋�
Live Off-The-Air APRS Activity Maps
牋 <>
Long-Range APRS on 30 Meters HF
牋 <>
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