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[aprssig] KPC3+ induced errors

Wes Johnston, AI4PX wes at ai4px.com
Tue Mar 15 09:44:53 UTC 2011


Me starting to think it's a head and tail pointer problem in the buffer.

Wes
---
The world needs more geniuses with humility because there are so few of us
left.



On Mon, Mar 14, 2011 at 23:55, Stephen H. Smith <wa8lmf2 at aol.com> wrote:

>  This just in from the CA_APRS Yahoo! list:
>
>
> "
>
> Attached is a post I made today on Lynn's APRSIS32 group:
> ----------------------------------------------------------------------
> http://groups.yahoo.com/group/aprsisce/
>
> Lynn,
> I have been testing several KPC-3+'s trying to duplicate the known 3+ APRS
> I-Gate delay problem. N6VUD-2 I-Gate finally started delaying packets to IS.
> This happened after letting it run without any interruptions for about 5
> days. It started delaying packets by about 2 minutes, after a few days up
> over 10 minutes. I have documented my findings, and it appears to be a
> buffer holding back in the 3+. I tested with APRSIS32 running AGW and the 3+
> in KISS. Somehow the 3+ starts to buffer packets, probably within the
> MC68HC11F1 processor, since it was holding back over 50 packets. It then
> starts sending old stale packets as new packets were received in a FIFO
> fashion. I have a video of this, I will post it.
>
> After documenting I wanted to see if a simple exit KISS, enter KISS from
> the Enables/Ports/KPC3+ would clear the delay. After un-checking the KPC-3+,
> then checking again It did clear up the delay problem.
>
> Could a timed port reset macro be added? I would like to be able to have it
> exit KISS, then re-start KISS immediately. This could be done late at night,
> or every six hours.
>
> I have been working with another I-Gate sysop that has the same problem, he
> is running javAPRSIGate, and has a timer that resets the power to the KPC-3+
> every morning 5AM. It clears the delay, but sometimes starts delaying again
> after as little as 4 hours.
>
> Alan:-)
>
> To vote, please visit the following web page:
> http://groups.yahoo.com/group/ca_aprs/surveys?id=2655572
>
>
>
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>
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