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Subject: HamDigitalDigest 2000/8A
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Ham-Digital Digest Sat, 8 Jan 10 Volume 2000 : Issue 8
Today's Topics:
Data modes on 50MHz
Kenwood D700A arrived
Multi-Mode TNC Emulation in Software?
Ok, I am lost now.... HELP!!!
Pactor II sked anyone?
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Loop-Detect: Ham-Digital:2000/8
----------------------------------------------------------------------
Date: Fri, 7 Jan 2000 22:46:13 GMT
From: Bob Sayers <bob.sayers@zetnet.co.uk>
Subject: Data modes on 50MHz
Hi, All;
I'm keen to start using PACTOR and PACTOR-II on 50MHz from the UK.
What activity is there currently on this band?
What frequencies are being used?
regards,
Bob, G8IYK
>.
------------------------------
Date: Fri, 07 Jan 2000 19:57:25 +0100
From: Joop van der Velden <pe1dna@amsat.org>
Subject: Kenwood D700A arrived
Chris Arndt wrote:
> This is a dual band 200 channel radio, and can do the standard 2m/440,
> also 2m/2m, and I think 440/440. There is an integral 1200/9600 TNC, which
> can be used split between bands for PACSAT work.
> Post questions and I'll try to answer them.
What is the tx <> rx turnaround time ?
What is the bit error rate for 9600bd use ? Did they make the classical
mistake of modulating the VCO ?
--
Joop van der Velden
pe1dna@amsat.org
>.
------------------------------
Date: Fri, 7 Jan 2000 16:30:00 -0500
From: "Rob" <Pse@NoEmail.Com>
Subject: Multi-Mode TNC Emulation in Software?
Hi Darrell,
I am not quite sure what you are asking. If you want another BOX that will
do everything. There is no such beast.
The best all mode modem available is the SCS PTC II or SCS PTC IIe. The
SCS PTC II is a DSP modem that supports RTTY, AMTOR, PACTOR 1 and PACTOR II,
PSK31, NAVTEX, SSTV, FAX, HF packet etc. The SCS PTC II and the SCS PTC IIe
are the ONLY modems which support PACTOR II, a proprietary mode of SCS. In
my view, PACTOR II is by far the most robust HF mode out there! It is great.
DATA just zips along even if you can't hear the signal. Unfortunately, the
SCS modems are expensive.
In addition, the SCS PTC II or PTC IIe do not support GTOR or CLOVER which
are other proprietary modes of KANTRONICS and HAL. Not a big loss in my
view. There is very little GTOR activity on the ham bands. There is more
CLOVER activity. But PACTOR II is by far the most popular of the
proprietary modes.
BUT I suspect you are looking for software to be used with a PC or MAC (with
a sound card) which would allow you to transmit and receive AMTOR, PACTOR,
PSK31, RTTY, ASCII etc. I also suspect that you are looking for FREEWARE
or relatively inexpensive software. (Why else would you choose a sound card
over a dedicated external DSP based modem??)
There are many PC based programs for PSK31, RTTY and ASCII, and AMTOR. Most
run under windows but some run under DOS.
Unfortunately, there isn't one program for a PC that does all the modes you
mentioned.
For PSK31 and RTTY, you may want to consider WRITELOG for Windows and a
sound card. For PSK31, Use Logger for Windows and a sound card. Logger is
great! (Logger is freeware and can be found at www.itis.net/golist).
The hardest modes to implement using a WINDOWS based program are modes that
have strict timing requirements like AMTOR and PACTOR. I don't know of ANY
WINDOWS based programs that implement AMTOR and PACTOR protocols in the PC.
Some have tried using a Windows based program but gave up due to timing
problems (i.e. the link was very unstable!)
But using DOS is a different story. It is a lot easier (but still hard) to
write programs for DOS that have strict timing requirements (eg AMTOR and
PACTOR)
HB9JNX has written a freeware program for DOS called TERM PSA that
implements RTTY, AMTOR and PACTOR 1 protocols in the PC BUT the PC needs a
really good sound card with its own DSP chips. The TERM PSA program runs
only under DOS and only supports Soundcards with a PersonalSoundArchitecture
(PSA) Chipset from Analog Devices, such as Echospeech Personal Sound System
and others. TERMPSA.ZIP can be found at
http://www.ife.ee.ethz.ch/~sailer/ham/ham.html. TERM PSA will NOT work with
the typical sound card found in many PC's (eg Sound BLASTER)
Alternatively, using a very simple external modem that decodes and generates
MARK/SPACE signals, you can run RTTY, AMTOR and PACTOR I with another DOS
program called TERMAN93 by HB9JNX (go to
http://www.ife.ee.ethz.ch/~sailer/ham/ham.html)
TERMAN93 (and TERM PSA) implement the RTTY, AMTOR and PACTOR protocols in
the PC. Since DOS is used as the OS, it is possible avoid the timing
To be continued in digest: hd_2000_8B
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