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1994-11-13
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Date: Tue, 1 Feb 94 04:30:18 PST
From: Ham-Digital Mailing List and Newsgroup <ham-digital@ucsd.edu>
Errors-To: Ham-Digital-Errors@UCSD.Edu
Reply-To: Ham-Digital@UCSD.Edu
Precedence: Bulk
Subject: Ham-Digital Digest V94 #21
To: Ham-Digital
Ham-Digital Digest Tue, 1 Feb 94 Volume 94 : Issue 21
Today's Topics:
Digital Conference
digital modulation
Ka9q for windows
Source For Info re Ham Radi
TCP bridge software on 386 box with "Rangelan ISA" cards.
Thanks for help
Send Replies or notes for publication to: <Ham-Digital@UCSD.Edu>
Send subscription requests to: <Ham-Digital-REQUEST@UCSD.Edu>
Problems you can't solve otherwise to brian@ucsd.edu.
Archives of past issues of the Ham-Digital Digest are available
(by FTP only) from UCSD.Edu in directory "mailarchives/ham-digital".
We trust that readers are intelligent enough to realize that all text
herein consists of personal comments and does not represent the official
policies or positions of any party. Your mileage may vary. So there.
----------------------------------------------------------------------
Date: 31 Jan 94 19:20:45 GMT
From: news-mail-gateway@ucsd.edu
Subject: Digital Conference
To: ham-digital@ucsd.edu
Subject: Time:1:16 PM
OFFICE MEMO Digital Conference Date:1/31/94
1994 ARRL NATIONAL CONFERENCE ON DIGITAL COMMUNICATIONS
MINNEAPOLIS, JANUARY 12 -- The TwinsLAN ARC today
announced that it will sponsor the 1994 ARRL National Digital
Communications Conference on August 19 through 21 at the
Thunderbird Hotel and Conference Center in Bloomington,
Minnesota, U.S.A.
The objective of the conference is to create a forum for
radio amateurs and experts in digital communications to meet,
publish their work and present new ideas and techniques for
discussion. Presenters and attendees will have the
opportunity to exchange ideas and learn about recent hardware
and software advances, theories, experimental results, and
practical applications. Areas of interest include
generation, coding, modulation and demodulation,
transmission, networking, processing, presentation and
application of voice, text, image and data information.
The conference site is located near the Minneapolis/St.
Paul International Airport, just off Interstate I-494. Free
24-hr shuttle service is available to and from the airport.
AGENDA:
The agenda for the three-day event includes informal
activities for attendees and family members on Friday, August
19 through noon Sunday, August 21. Formal conference
activities, including presentation of papers and six forums
are scheduled for Saturday, August 20, from 8:30 am to 5 pm.
A detailed agenda will be available when schedules are
finalized.
CALL FOR PAPERS:
Anyone interested in digital communications is invited
to submit a paper for publication in the conference
Proceedings. Presentation at the conference is not required
for publication. Papers are due by June 20 and should be
submitted to Maty Weinberg, ARRL, 225 Main St., Newington, CT
06111, U.S.A., or via Internet at lweinber@arrl.org.
A challenge is to get the "doers and thinkers" to set
aside their soldering irons or turn away from their code long
enough to document their work. In this regard, if there is a
topic you think should be included in the Conference, or
someone that should be encouraged to publish and/or present
their accomplishment, please contact Rick Whiting, W0TN, by
Internet e-mail (preferred) to rick_whiting@atk.com, or by
MCI Mail, CompuServe 71445,377, or U.S. Mail to 5780 Rosewood
Lane N., Plymouth, MN 55442, U.S.A.
ACCOMMODATIONS:
On-site accommodations are available at a special rate
of $67 (plus tax) for single occupancy or $73 (plus tax) for
double occupancy. Make reservations directly with the
Thunderbird Hotel at 800-328-1931 before July 29 for these
special rates. Be sure to mention you are attending the
National Digital Communications Conference. Off-site
accommodations are available in the area starting at $39.95.
Contact the NDCC Info Line for a list of facilities. Early
reservations are encouraged. A list of area campgrounds for
RVs is also available. Northwest Airlines is offering an
additional 5% discount on airfare to and from the Twin Cities
for conference attendees. Call the NDCC Info Line for
details.
A FAMILY WEEKEND:
Family participation in the NDCC is encouraged. The
hotel has a large pool for guests. Informal outings are
planned to the Minnesota Zoo (admission extra) and the Mall
of America, the largest indoor shopping mall in the US. Free
scheduled shuttle service is also available from the
conference center to the Mall. Minnesota is a great place to
visit in August. Consider making this weekend an addition to
your family vacation plans. Twin Cities and Minnesota
tourist information packets are available on request to the
NDCC Info Line.
REGISTRATION:
The conference registration fee is $45 per person, which
includes a luncheon buffet, a set of conference papers
(including those submitted but not presented) and
transportation to the Mall of America on Saturday evening.
Registration, by check payable to "TwinsLAN Conference", must
be received by August 12. Mail your registration form and
check to:
1994 National Digital Communications Conference
c/o Paul Ramey WG0G
16266 Finland Ave.
Rosemount, MN 55068
U.S.A.
ADDITIONAL INFORMATION:
Contact Paul Ramey at the NDCC Info Line, 612 432-1149
(evenings and weekends) or Carl Estey, WA0CQG, via Internet
e-mail at estey@skyler.mavd.honeywell.com.
NOTE:
Please post this announcement on your local land-line BBS and
print in your club newsletter.
------------------------------
Date: 29 Jan 1994 13:07:35 -0800
From: nntp.crl.com!crl.crl.com!not-for-mail@decwrl.dec.com
Subject: digital modulation
To: ham-digital@ucsd.edu
I wan't to make a simple digital link, One of the ways I was tinking
of doing it was using an MC2833 for the xmitter and a MC3363 for the
receiver, my question is how do I modulate the transmitter, can I
just run the logic voltage (0 or 5V) into the "mod in" of the
xmitter chip? Or to I need to use AFSK? Would just running the
logic voltage into the mod effectivly give me a low and high ouput
from the mc3363's data slicer? I'd like not to use modem chips. And
since I'm going to use uProcessors on each end I was hoping to use them
for the timing etc. I want to know if this will work before I invest
alot of time making a prototype that doesn't work.
Also what about using AM? what kind of simple modulation methods are
simple for AM? Since AM receivers/transmitters are much cheaper to
build.
Anyway I only need 300baud, but 1200 would be nice. I'm going to build
this to operate on the 49MHz band, and I don't need more than about
1mw of power output since I only need about 50feet of range.
Any ideas would be appreciated.
Thanx in advance,
mycal
------------------------------
Date: Fri, 28 Jan 1994 18:03:31 GMT
From: usc!howland.reston.ans.net!pipex!uknet!nessie!john@network.ucsd.edu
Subject: Ka9q for windows
To: ham-digital@ucsd.edu
Several versions of the KA9Q package WILL run in a DOS window on Windows 3.1,
because I use one version regularly.
John, G1YYH
<a href="http://www.mcc.ac.uk/~john/JohnHeaton.html">Click Here</a>
------------------------------
Date: 31 Jan 94 21:53:34 GMT
From: news-mail-gateway@ucsd.edu
Subject: Source For Info re Ham Radi
To: ham-digital@ucsd.edu
Subject: Time:1:25 PM
OFFICE MEMO Source For Info re Ham Radio Date:1/31/94
The following is in answer to Steve Ling's request for info on ham radio...
A good place to start is the American Radio Relay League (ARRL) Information
Service. This is a mail server that let's you access many information files
containing information about various facets of Amateur Radio. You can
retrieve these files selectively by sending an e-mail message to ARRL HQ
(address to info@arrl.org). Each file you request is e-mailed back to you
automatically, usually within a few hours. To start I recommend you send the
following as the text of the message:
send help
send index
send prospect
quit
This will get you all the information you need to use the infor server to get
the answer to your question.
73/Rick W0TN (rick_whiting@atk.com)
------------------------------
Date: 1 Feb 1994 02:52:02 GMT
From: munnari.oz.au!newshost.anu.edu.au!arp!jdb@network.ucsd.edu
Subject: TCP bridge software on 386 box with "Rangelan ISA" cards.
To: ham-digital@ucsd.edu
Hi - a newbie question.
I want advise on the best setup using "cheap" hardware for TCP/IP over
radiowaves, preferably for 5 to 10 miles line-of-site.
I currently have some 80386 computers with the "RangeLan ISA" cards and
ethernet cards in them. I plan to use these as bridges/routers/repeaters
(whatever works best) between geographically seperate ethernets.
Specifically one at my house and one at my work.
I would like advise on what software to use (JNOS, KA9Q, etc), what version
of this software, advise on whether I should upgrade to 486 processors
(I am currently using the 242 Kbps Rangelan cards, but might use the 2Mbps
cards), advise on aerials (although I think I have about the best price vs.
performance with a Yagi), advise on how well other people succeeded with
this sort of setup, advise on distance vs. reliability, the affect of
weather on comms, the maximum throughput anybody has got, and any general
advise that you think of.
you can email to me and I will summarise.
Details on the RangeLan cards I have:
========== don't read any further unless you are bored ==============
General:
========
bus interface: ISA bus (PC/XT or PC/AT)
maximum range: 500 feet (assumes no directional aerial !)
data rate: 242 Kbps
Network:
========
Driver support: NetWare 2.X, LANtastic, NetBIOS, NetWare Lite,
NetWare 3.11, NDIS
Media Access Protocol: RangeLAN CSMA/CA
Error detection/correction: spread spectrum coding/decoding,
hardware CRC-16 and firmware
Logical Link Control (LLC)
Security: hardware scrambling, software controlled security code
Radio:
======
Radio type: spread spectrum
Frequency band: 902 to 928 Meghertz
Independant Channels: 3
Physical:
=========
Width: 3.9 inches
Length: 9.2 inches
Regulatory Approval:
====================
FCC: Class B
Compatability Notes:
====================
NetWare: 2.X, 3.11, Lite
NetBIOS: full support
LANtastic: requires copy of LANtastic AI at each node
[JDB: note, I am note sure about the letters "AI",
I am working off a photocopy of a fax :-( ]
LAN Manager: NDIS driver
--
John Barlow, Parallel Computing Research Facility, I-Block,
Australian National University, Canberra, 0200, Australia.
email = John.Barlow@anu.edu.au
[International = +61 6, Australia = 06] [Phone = 2492930, Fax = 2490747]
------------------------------
Date: Fri, 28 Jan 1994 15:06:35 GMT
From: usc!howland.reston.ans.net!cs.utexas.edu!csc.ti.com!tilde.csc.ti.com!cauldron!ra.csc.ti.com!sti955.dseg.ti.com!sling@network.ucsd.edu
Subject: Thanks for help
To: ham-digital@ucsd.edu
Thanks for the email on getting started in amateur digital radio. There must
be a lot of people out there that really enjoy this! Sometimes things look
different from a beginner's perspective, especially for someone experienced
in the digital part and totally new to the radio part, so I will try to post
occasionally with my progress. Again, thanks.
[][][]
Steve Ling Texas Instruments, Inc.
sling@dseg.ti.com P.O. Box 655012, m/s 31
214-995-1378 Dallas, Texas 75265
------------------------------
End of Ham-Digital Digest V94 #21
******************************