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PA2AGA > HDDIG 14.01.00 05:14l 154 Lines 5536 Bytes #-9615 (0) @ EU
BID : HD_2000_12B
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Subj: HamDigitalDigest 2000/12B
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From: pa2aga
To: hd_broadcast@pa2aga
Subject: HamDigitalDigest 2000/12B
X-BBS-Msg-Type: B
From: nomail@rob.knoware.nl (Rob Janssen)
Subject: APRS sid's
Lumpy (mobile) <lumpy@digitalcartography.com> wrote:
>If you operate more than one station (an APRS digi
>and anything else, mobile, HT etc) the FCC rules
>want you to ID one of the stations with some form
>of unique identifier.
>That was one of the original reasons for the SSID.
Yes, and you should not give in to the protocol design nitwits that attempt
to put as many useful bits into the address header as they can possibly
think of. The address header is for addressing, not for specification
of symbols or station location or message switch position or... etc.
Boycot misuse of SSID, just put something in there that you like.
Ignore the comments from those that claim "it isn't right", they
should adjust their definition of "right".
Rob
--
+----------------------------------+--------------------------------------+
| Rob Janssen pe1chl@amsat.org | WWW: http://www.knoware.nl/users/rob |
| AMPRnet: rob@pe1chl.ampr.org | AX.25 BBS: PE1CHL@PI8WNO.#UTR.NLD.EU |
+----------------------------------+--------------------------------------+
>.
------------------------------
Date: Wed, 5 Jan 2000 10:53:25 GMT
From: nomail@rob.knoware.nl (Rob Janssen)
Subject: Digital Modes, Via Sound Card
Bill Turner, W7TI <wrt@eskimo.com> wrote:
>It's not so much like "reinventing the wheel" as it is like building
>your own car from scratch. Sure, you could do it, but why bother when
>there are so many great ones out there?
This seems more like a philisophical question. Why would you do anything
yourself when you can just take advantage of what others did?
Well, some people find it satisfying to design and/or construct something
by themselves for a hobby, while others apparently find it good enough
to rely on the work that others have done.
Of course, once everybody has moved to that group, there will be no more
new developments. There already has been a big shift of people from the
"doers" to the "users" group in amateur radio in the past decade or two,
but it seems there still are enough "doers" left to keep the others, that
just install a new program or buy a new gizmo when it "becomes available",
satisfied.
However, it never hurts to encourage people to try to create something
themselves. It will at least give them an idea what is involved before
a program appears on a website as if by magic, and it could always happen
they get the feel of it and join the group of developers.
Rob
--
+----------------------------------+--------------------------------------+
| Rob Janssen pe1chl@amsat.org | WWW: http://www.knoware.nl/users/rob |
| AMPRnet: rob@pe1chl.ampr.org | AX.25 BBS: PE1CHL@PI8WNO.#UTR.NLD.EU |
+----------------------------------+--------------------------------------+
>.
------------------------------
Date: Tue, 11 Jan 2000 18:19:13 GMT
From: marsgal42@hotmail.com
Subject: DSP modem implementation
One of my faves for comms stuff is Communication Systems
by Haykin.
Whether people like it or not, mathematics is the tool
for this stuff...
--
Laura Halliday VA3LDH "Que les nuages soient notre pied
Grid: FN03gs a terre..." - Hospital/Shafte
Satellite: VA3SFL on AO-16, UO-22, KO-23, KO-25
Sent via Deja.com http://www.deja.com/
Before you buy.
>.
------------------------------
Date: Wed, 05 Jan 2000 14:26:19 +0200
From: Paul Keinanen <keinanen@sci.fi>
Subject: FCC 5 WPM test requirement :-)
On 05 Jan 2000 05:21:40 GMT, cgales@aol.comstopjunk (CGALES) wrote:
>Besides, while the new HF modes are interesting, how much real
experimentation
>is involved by downloading someone else's software, loading it onto your
>computer and running it?
And you expect that all protocols works well in all environment when
installed?
A protocol may require experimentation in order to get it working in
some particular propagation environments. While CW has a mediocre
performance in all propagation environments, some more modern
protocols work excellently in some environments (e.g. PSK31 in
keyboard to keyboard QSO with a phase stable propagation path), while
the performance drops very badly in a different environment (e.g. file
transfer or in aurora propagation). Thus, part of the experimentation
is selecting the right kind of protocol for a particular kind of
requirements.
By doing so, this is similar to selecting the best tool (e.g. knife,
screwdriver, scissors, sledge) can be used for a particular task and
not having to rely on mediocre tools (e.g. hammer) for all jobs.
Paul OH3LWR
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