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[aprssig] INVALID STREAM entry in aprsd logs

Doug Ferrell kd4moj at kd4moj.org
Wed Dec 28 00:38:54 UTC 2005


Stephen H. Smith wrote:
> fred at wb4aej.com wrote:
>>     I just pulled up that D700a.  Wow, that's cool.
>>
>>     Does it simultaneously run APRS while you run HF or VHF or can
>> it only do one at a time?
>>
>>     73,
>>
>>
>>
> It would be rather difficult to run HF since it only covers 2M and
> UHF.   Otherwise it is a "dual dual-bander" -- essentially TWO
> dual-band radios in one box.  This allows you to run APRS on the left
> side, and voice either on another 2M freq or UHF on the right side at
> the same time.
>
> The main limitation is that if you run both sides on the same band,
> you can't receive on one frequency while you are transmitting on the
> other since there is no in-band isolation between the two sides.  It
> is possible to configure the TNC carrier detect to monitor both
> receivers' squelches so that an automatic APRS beacon will wait until
> the second receiver closes squelch before  keying up.   If you don't
> do this, you get about a 1/2 second hole punched into your receive on
> the second freq each time the APRS beacon keys up.   This creates an
> effect similar to a priority channel scan where your operating
> channel receive gets interrupted periodically to check the priority
> channel.
>
> If you run 2M on one side and UHF on the other, the two sides are
> totally independent and can operate simultaneously.
>
> Stephen H. Smith    wa8lmf (at) aol.com
> EchoLink Node:      14400    [Think bottom of the 2M band]
> Home Page:          http://wa8lmf.com
>
> "APRS 101"  Explanation of APRS Path Selection & Digipeating
>   http://webs.lanset.com/wa8lmf/DigiPaths
>
> Updated APRS Symbol Chart
>   http://webs.lanset.com/wa8lmf/miscinfo/APRS_Symbol_Chart.pdf
>
>
> New/Updated "Rev G" APRS     http://webs.lanset.com/wa8lmf/aprs
> Symbols Set for UI-View,
> UIpoint and APRSplus:

  This is all cool.........


	But...... has anyone noticed what my subject was about? or is it just
me????


...DOUG
KD4MOJ






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