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ZL3AI > APRDIG 17.11.06 08:35l 126 Lines 4815 Bytes #999 (0) @ WW
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Subj: [APRSSIG] Vol 29 #14, 2/2
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From: ZL3AI@ZL2BAU.#79.NZL.OC
To : APRDIG@WW
Message: 10
Date: Thu, 16 Nov 2006 05:26:12 -0800 (PST)
From: kc9umr_at_freqradio.com
Subject: Re: [aprssig] transceiver for APRS?
If it's an APRS specific radio, how important is frequency agility?
something that's computer configuarable (maybe the firmware defaults to
144.390 as a frequency, but you can re-configure it to default wherever
you want) for standalone/tracker applications, and computer controllable
for applications where you want that capability (home / "experimentation"
applications).
Having a Tiny Trak type TNC (or a 2 way TNC, but something that's simple
to use and setup, don't need a LOT of features, really...) would be nice,
so all you need to do is configure it, plug in a GPS and antenna, and go.
Am i thinking too much of a D700 with no "bells and whistles"? I guess
i'm thinking of something similar to a D700 with no dual band capability,
no fancy display....
just my 0.02.
73
Ken, KC9UMR
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Message: 11
Date: Thu, 16 Nov 2006 06:22:10 -0800 (PST)
From: "Curt, WE7U" <archer_at_eskimo.com>
Subject: Re: [aprssig] transceiver for APRS?
On Thu, 16 Nov 2006 kc9umr_at_freqradio.com wrote:
>If it's an APRS specific radio, how important is frequency agility?
>something that's computer configuarable (maybe the firmware defaults to
>144.390 as a frequency, but you can re-configure it to default wherever
>you want) for standalone/tracker applications, and computer controllable
>for applications where you want that capability (home / "experimentation"
>applications).
Depends on what you want to do. If it has no voice capability, then one of
the reasons for making it frequency agile goes out the door: That of going
to the local repeater based on info received on the APRS channel. One
could still do this for packet/APRS uses though, like switch to a local
channel for traffic/weather reports, then switch back for tracking.
One could also have it switch to satellite frequencies based on predicted
passes, tracking doppler if necessary, then switch back to the normal APRS
frequency.
Another use is for alternate APRS frequencies, but this would normally not
require real-time agility, only a jumper or programmed setting.
>Having a Tiny Trak type TNC (or a 2 way TNC, but something that's simple
>to use and setup, don't need a LOT of features, really...) would be nice,
>so all you need to do is configure it, plug in a GPS and antenna, and go.
Opentracker "Tracker2" or a TinyTrak4. I personally prefer open-source
stuff, so the Tracker2 is it.
--
Curt, WE7U. APRS Client Comparisons: http://www.eskimo.com/~archer
"Lotto: A tax on people who are bad at math." -- unknown
"Windows: Microsoft's tax on computer illiterates." -- WE7U
"The world DOES revolve around me: I picked the coordinate system!"
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Message: 12
Date: Thu, 16 Nov 2006 16:42:53 +0100
From: "Jan T. Pharo" <la2bba_at_jpharo.net>
Subject: Re: [aprssig] transceiver for APRS?
kc9umr_at_freqradio.com, Thu, 16 Nov 2006 05:26:12 -0800 (PST):
>If it's an APRS specific radio, how important is frequency agility?
>something that's computer configuarable (maybe the firmware defaults to
>144.390 as a frequency, but you can re-configure it to default wherever
>you want) for standalone/tracker applications, and computer controllable
>for applications where you want that capability (home / "experimentation"
>applications).
If APRS specific, it should at least be able to use the APRS VHF
frequencies for all regions, i.e. 144.390 and 144.800 plus the main
secondary channel for the regions. With a tone squelch capability, users
also could use Voice Alert with CTCSS on the APRS frequency, and then a
couple of simplex VHF frequencies for all regions should be available as
well for follow-up conversations.
--
73 de Jan, LA2BBA
Hvaler, Norway
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Message: 13
Date: Thu, 16 Nov 2006 07:53:49 -0800 (PST)
From: kc9umr_at_freqradio.com
Subject: Re: [aprssig] transceiver for APRS?
This reminds me of one thing i'd like the D700 to do -
Change my status text to read "monitoring [insert freq in voice band here]
[PL XXX.X/DPL XXX][+/-/SMX]". I'm sure it wouldn't be hard to make a
little Microcontroller to do this for me, maybe poll the radio every 2 or
3 minutes for the data, and enter the text....
making it so this "new" radio could interface with other rigs (granted, it
would be a limited set of radios, but i'm sure this could be expanded by
the user, given the "computer control-ability" that we're talking about)
to do something likt this would be neat....
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End of aprssig Digest, Vol 29, Issue 14
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