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ZL3AI > APRDIG 01.01.04 13:12l 239 Lines 9452 Bytes #999 (0) @ WW
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Subj: TAPR Digest, Dec 31, 2/3
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: DCD implementation on TNC-X - Correction
From: John Hansen <hansen@fredonia.edu>
Date: Wed, 31 Dec 2003 12:20:59 -0500
X-Message-Number: 5
> When no audio is presented to the MX-614 modem chip, the modem chip
>sends out a string of high and low pulses.
^^^^^
Sorry, that should have said when Bell 202 tones are not presented to the
modem chip. It sends out pulses regardless of whether there is audio or not.
John
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Subject: fourth.aprs.net outtage
From: Gerry Creager N5JXS <gerry.creager@tamu.edu>
Date: Wed, 31 Dec 2003 12:04:52 -0600
X-Message-Number: 6
Thanks to a planned network outtage that lasted longer than expected,
and 3 unplanned power failures to the Texas A&M University campus,
fourth.aprs.net was off the air, off and on, for the last several days.
The network outtage has come and gone, with no apparent effect save
cutting connectivity for some 6 hours.
The power failures are still under investigation. I *hope* they're
done. They collectively lasted long enough to exhaust the UPS running
the machine room the server's located in. Or, in other words, well past
6 hours.
*****
fourth.aprs.net should be back up. Please notify me by e-mail of problems.
*****
I'm sorry for any inconvenience. I'm off to the office now to try to
ressurrect the work machines this succeeded in killing...
73, Gerry N5JXS
--
Gerry Creager -- gerry.creager@tamu.edu
Network Engineering -- AATLT, Texas A&M University
Cell: 979.229.5301 Office: 979.458.4020 FAX: 979.847.8578
Page: 979.228.0173
Office: 903A Eller Bldg, TAMU, College Station, TX 77843
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Subject: Re: Source Code for TNC-X available now.
From: David VanHorn <dvanhorn@cedar.net>
Date: Wed, 31 Dec 2003 13:06:56 -0500
X-Message-Number: 7
At 11:39 AM 12/31/2003 -0500, John Hansen wrote:
>The firmware for TNC-X (both source code and .HEX file) are now available from
the documentation link off of:
>
>http://www.tnc-x.com
Thank you.
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Subject: If you climb a tower, you need to read this....
From: blitz <blitz@macronet.net>
Date: Wed, 31 Dec 2003 13:38:37 -0500
X-Message-Number: 8
Will Your Safety Harness Kill You?
(Taken from Occupational Health & Safety magazine, Vol. 27, No. 3
>http://www.cdc.gov/elcosh/docs/d0500/d000568/d000568.html
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Subject: Subject: SmartBeaconing and corner pegging... utility?
From: "K. Mark Caviezel" <kmcaviezel@yahoo.com>
Date: Wed, 31 Dec 2003 12:12:32 -0800 (PST)
X-Message-Number: 9
Andrew, all,
ok, sorry, gotta chime in with my $0.02 on this.
We{re all hams here, so we like techie things. A new
smart beaconing algorithm is indeed a cool new techie
thing, but we should all take a deep breath, take one
step backwards and think about the utility of it all.
I think you gotta think about whether or not you{re
adding any true utility to all this. I like high rate
beaconing (more than one per 10 minutes) when I{m
moving, and low rate (one per hour or less, possibly
none at all) beaconing when I{m not.
If, for example, someone was stalking me on
findu.comdesperatelyately needed to come see me in
persotrulyruely doubt if their search would be
conducted any differently if I sbeaconedonned, corner
pegged and all that, or if I beaconedonned every 5
minutes or so. Not to mention that friends could hail
me on the repeater I frequent or call me on my cell
phone.
If someone saw that I was heading down the interstate,
and the next packet showed me on the arterial street,
I think it is pretty obvious that I took the offramp.
If my mobile APRS unit sprayed out a few packets
while I was on the offramp, that would only confirm
that I didn{t do some serious 4 wheeling in an attempt
to make my own road. Regardlessdoesn'toesnt matter
because someone who wants to know my position would
get an update in due time if I was for example
beaconing once every 3 or 5 minutes. And if there
was some compelling reason for me to leave a
tremendously detailed breadcrumb path, I can jack up
the beacon rate, or manually send beacons.
In a paved environment a couple minutes can mean the
difference of a couple miles on highways and
arterials, but think about how many highways and
arterials you have to choose from in any given city,
its just not so many that Id be befuddled if I was
trying to find an aprs mobile ham if he was beaconing
every 3 minutes.
I initially thought that corner pegging was really
cool but i{ve never used it as I just cant see the
purpose of someone knowing my exact path when I am
going from point a to point b.
The SAR folks may disagree, but I would contend that
fixed time interval beaconing would be fine for SAR
activities, too. If someone is really moving fast,
you{re going to find them on the highway. If they{re
moving slow it will be pretty easy to track them down.
OKOk, the most valuable part of what I have to say is
here,
A friend of mine is active in Red Cross activities.
They{ve had a recent push to have Red Cross volunteers
get their halicenseses. So, now she has her
teclicensece. Of course it is now up to me to tell
her about bands, frequencies, antennas propagation,
repeaters, splits, offsets, PL tones, CTCSS, squelch
etc. And of course I told her about APRS, too. My
concern is that if corner pegging and smart beaconing
become a big part of the APRS terrain, wein factt run
a real risk of completely overloading the newbies
while not adding acommensuratee increase in usefulness
for things that are likely to be conducted with APRS.
' KMC kc0jhq Denver, CO
PSs, ok truth be known the one smart beaconing type
feature that I would embrace is jacking down the path
when the beacon rate is jacked up. WIDE3-3 just isn't
necessary if there was a reason why id be beaconing
1x-min or more - if someone is so close to me that a 1
or 2 mile change in my position is of interest to them
they can probably receive my direct signal.
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Subject: Re: Subject: SmartBeaconing and corner pegging... utility?
From: David VanHorn <dvanhorn@cedar.net>
Date: Wed, 31 Dec 2003 15:29:50 -0500
X-Message-Number: 10
>The SAR folks may disagree, but I would contend that
>fixed time interval beaconing would be fine for SAR
>activities, too. If someone is really moving fast,
>you{re going to find them on the highway. If they{re
>moving slow it will be pretty easy to track them down.
I've found it really nice for skywarn.
With fixed rate, you never really know where I am, or how I got there.
With SB as implemented in the HamHud, you know how I got there, so I don't
have to remember/explain it to someone else, they can just look at my
track. Did I check a particular street for damage? You don't have to take
airtime to ask me, just look at the track.
I like the fact that it's automatic.
I don't have to take time to turn it on when I'm in a rush, and I don't
have to remember to turn it off after 4-12 exhausting hours on duty.
Anything that has to be manually set, will end up getting left in the wrong
state.. It's like the power button on your mobile rig. I'd bet you that
it's sitting in "high", because high always works.
There's an incentive to you (not making the repeater) to move power up, but
none to move it down. There are consequences, (getting into other
repeaters on the same freq) but they don't affect you directly.
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Subject: Re: Subject: SmartBeaconing and corner pegging... utility?
From: "Stephen H. Smith" <WA8LMF2@aol.com>
Date: Wed, 31 Dec 2003 13:34:37 -0800
X-Message-Number: 11
David VanHorn wrote on 12/31/2003, 12:29 PM:
>I've found it really nice for skywarn.
>With fixed rate, you never really know where I am, or how I got there.
>With SB as implemented in the HamHud, you know how I got there, so I
>don't have to remember/explain it to someone else, they can just look
>at my track.
One neat way to handle this issue is with a TigerTrack TM-1 tracker.
The TigerTrak (and I think also the Byonics Tiny Trak though I'm not
sure) is capable of simultaneous automatic periodic beaconing --AND--
PTT-triggered (Mic-E type) beacons. Instead of connecting the manual
input to a mic's PTT line, connect it to a pushbutton instead. Set
autobeaconing to a conservative rate to produce a general plot of your
course. Whenever you are at point of special note (perhaps a SAR
waypoint or change of direction), just press the button to force an
on-demand posit.
TigerTrak info at:
http://gpstracker.com
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Subject: Re: Subject: SmartBeaconing and corner pegging... utility?
From: David VanHorn <dvanhorn@cedar.net>
Date: Wed, 31 Dec 2003 18:42:00 -0500
X-Message-Number: 12
>Whenever you are at point of special note (perhaps a SAR
>waypoint or change of direction), just press the button to force an
>on-demand posit.
So now in addition to handling the steering wheel, mic and cell phone, I
have to push buttons on every corner?
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