Hi Stephen,
This is on TX packets from my iGate rather than RX packets to my iGate.
My KPC-3 saves them up and then send all the TX packets at random intervals.
If I quickly power cycle the radio, it resolves it for a few, but comes right back in no time.
Thanks again!
-Scott
KD4YDD
________________________________
From: ui-view@... <ui-view@...> on behalf of 'Stephen H. Smith' wa8lmf@... [ui-view] <ui-view@...>
Sent: Saturday, October 26, 2019 2:26 PM
To: ui-view@... <ui-view@...>
Subject: Re: [UI-View] Delayed long packets sent
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. This is an issue that had been going on for
DECADES, with Kantronics denying there is a problem since forever! 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..
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". 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 wa8lmf (at) aol.com
Skype: WA8LMF
EchoLink: Node # 14400 [Think bottom of the 2-meter band]
Home Page:
Live Off-The-Air APRS Activity Maps
<>
Long-Range APRS on 30 Meters HF
<>
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