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Subject: PacketRadioDigest 99/34
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Packet-Radio Digest Wed, 17 Feb 99 Volume 99 : Issue 34
Today's Topics:
Does anyone know of a PCMCIA TNC card?
New to packet
PK232MBX
Where to find APRS Maps?
Why a TNC? (2 msgs)
Send Replies or notes for publication to: <Packet-Radio@UCSD.Edu>
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Archives of past issues of the Packet-Radio Digest are available
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We trust that readers are intelligent enough to realize that all text
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Loop-Detect: Packet-Radio:99/34
----------------------------------------------------------------------
Date: Tue, 16 Feb 1999 20:50:53 -0600
From: Sid Ashen-Brenner <sashen@midusa.net>
Subject: Does anyone know of a PCMCIA TNC card?
At one point in time, PacComm had one in development, but I think they
gave up on it as being "more expensive" than most hams would be willing
to invest. Good luck findinig one!
Manytrails wrote:
>
> I just recently purchased a Pentium class laptop and am planning on using it
> for some business traveling and ham radio on the road. I wondered if anyone
> made a PCMCIA card TNC ? Has anyone ever seen such an animal? Please email
with
> any info you might have. Thanks....Bill
--
Sid Ashen-Brenner Salina, Kansas
Internet : sashen@midusa.net
AX-25 : n0obm @ n0obm.#ncks.ks.usa.noam
>.
------------------------------
Date: Sat, 13 Feb 1999 13:48:11 -0800
From: "Jim" <olwierdjim@NOSPAMyahoo.com>
Subject: New to packet
I'm trying to get a packet station on the air. Using a Baycom BP-2M with a
htx-202. It doesn't seem to be decoding. Can anyone suggest an active packet
freq in the LA County area? Any other helpful info would be appriciated
also. Thanks.
73, Jim W6EZB
>.
------------------------------
Date: Wed, 17 Feb 1999 00:33:44 GMT
From: jdouglas@timewave.com (John Douglas)
Subject: PK232MBX
In article <19990216121257.28838.00002257@ng-fd1.aol.com>, cmjk2og@aol.com
(Cmjk2og) wrote:
>If you have two serial ports and are using one for your mouse then just use
the
>second port for your TNC. Set it up for interupt #3 . Since you are
probably
>already using this interupt for your modem you will not be able to run both
>simultaneously. Of course, if you can set the modem to a different IRQ then
>your problem is solved. Good luck with it.
>
>C. Jespersen
Another solution to the same problem is change from a serial mouse to a PS/2
style mouse (If your mother board supports a PS/2 mouse) and that frees up
that
serial port for your TNC.
Port conflicts are the most common problem we hear at Tech Support here at
Timewave.
73
John Douglas
Timewave Technology
Check http://www.timewave.com for information on upgrading your PK-232 to a
PK-232/DSP and try the demo copy of PK TERM 99 that you can download at no
charge.
>.
------------------------------
Date: Tue, 16 Feb 1999 22:41:46 -0500
From: "Ray Fougnier" <fougnier@iserv.net>
Subject: Where to find APRS Maps?
Just wondering if anyone knows of detailed public domain maps that could be
added to WinAPRS.
Ray, KC8KWN
>.
------------------------------
Date: Tue, 16 Feb 1999 23:41:00 GMT
From: gwoods@albany.net (Gary Woods)
Subject: Why a TNC?
svwindigo@aol.comH2O (SV Windigo) wrote:
>I'm an experieced computer type and a long time Ham. However, I am new to
>digetal radio. My question is do I really need a TNC? It appears to me
that
>all the TNC does as make the computer act as a dumb terminal. It would seem
>that the whole thing can be done with software and a xcvr. I'm probably
wrong
>but had to ask.
The TNC has a couple of functions... demodulating the tones from the
receiver (some new ones with pretty sexy DSP chips) and executing a command
set to control whatever modes it operates.
The same can be done (and has been) using a sound card and software, but it
takes up a lot of resources. The computer terminal programs do a lot more
that a "dumb" terminal, so the op doesn't have to time commands at the TNC.
Can't tell you much about which approach is better, but I'm sure you'll get
volunteers!
--
Gary Woods O- K2AHC Public keys at www.albany.net/~gwoods, or get 0x1D64A93D
via keyserver
gwoods@albany.net gwoods@wrgb.com
fingerprint = E2 6F 50 93 7B C7 F3 CA 1F 8B 3C C0 B0 28 68 0B
>.
------------------------------
Date: Wed, 17 Feb 1999 00:46:20 GMT
From: jdouglas@timewave.com (John Douglas)
Subject: Why a TNC?
In article <19990216172850.02918.00002843@ng-fa1.aol.com>,
svwindigo@aol.comH2O (SV Windigo) wrote:
>I'm an experieced computer type and a long time Ham. However, I am new to
>digetal radio. My question is do I really need a TNC? It appears to me
that
>all the TNC does as make the computer act as a dumb terminal. It would seem
>that the whole thing can be done with software and a xcvr. I'm probably
wrong
>but had to ask.
>
>73
>Chuck
Hello Chuck:
The TNC provides a number of services that make operation much nicer. An
on-line mailbox that is active even when the computer is disconnected.
Multiple sessions are in multiple windows, no interlacing of lines from
different QSOs. Parameter management is improved. File transfers are
supported, editing of scrollback buffers, etc. the features are almost to
numerous to mention.
The argument is much like, Why do I need Windows?, I can do almost anything
Windows does from the DOS C prompt. True if you can remember the syntax of a
hundred or so cryptic DOS commands,
TNC's provide APRS/GPS support and co-exist with other Windows programs.
The greatest improvement is the introduction of DSP technology into the TNC.
Error rates are dramatically improved, A good design includes twin-peak
brickwall designed for the specific tones and bandpass of the mode you are
using. Digital mode filters are not supplied in any current radios that I am
aware of.
Hope this helps
73
John Douglas
N0ISL
Timewave Technology
>.
------------------------------
End of Packet-Radio Digest V99 #34
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