Phil:
>I wonder if the Pactor III protocol/code been published yet?
Yes, it has. You'll find it on the ARRLWeb at:
http://www.arrl.org/FandES/field/regulations/techchar/
The FCC has been made aware of the publication as well.
73 . . . Steve, WB8IMY
-----Original Message-----
From: rtty-bounces@contesting.com [mailto:rtty-bounces@contesting.com]On
Behalf Of Phil Duff NA4M
Sent: Wednesday, August 11, 2004 3:18 PM
To: rtty@contesting.com
Subject: Re: [RTTY] ARRL's WinLink initiative and Pactor III
At 06:03 8/11/2004, Thomas K wrote:
>Since you have not realized YET that those PACTOR-III stations are out there
>... you should not have a problem !!!!
Yes - that's why I asked. I've never been interested in operating any of
the 'TOR modes so don't know much about their operations.
Research indicates that apparently Pactor III is operating in limited sub
bands:
Use of Pactor-III protocol is limited for US hams and some other countries
due to the very wide bandwidth of the Pactor-III signal. Presently digital
signals that occupy the bandwidth of PCT-III are restricted to a few sub
bands:
28.120-28.189 MHz, 24.925-24.930 MHz, 21.090-21.100 MHz, 18.105-18.110 MHz,
14.0950-14.0995 MHz, 14.1005-14.112 MHz, 10.140-10.150 MHz, 7.100-7.105
MHz, or 3.620-3.635 MHz.
>I think Pactor-III has been availiable for about more than 2 years now !
>Seems that they are operating outside the standard RTTY-freqencies.
Yes maybe - if Pactor III stations are adhering to the frequencies above
then there should be minimal conflict with RTTY operations, except perhaps
21.090-21.100 and 14.095-14.0995 can be heavily used by RTTY in major RTTY
contests.
I have been told that the ARES/EMCOMM PACTOR stations have been directed to
NOT configure themselves as PMBOs which is good.
Additional information I researched regarding FCC regs and Pactor III:
""A 4800 baud digital code may not legally be transmitted below 50 MHz, as the
rules are currently written. The limits on HF are 300 baud on all bands but
10m, and 1200 baud on 10m."
"In 1995 the FCC relaxed the rules concerning what sort of digital codes
could be used. To
paraphrase, the "new" rule states that any code is legal AS LONG AS IT IS
PUBLICLY PUBLISHED. That's the catch with PACTOR III--its code is NOT
published. The company that makes the PACTOR III controllers (SCS) has
refused to release the code details."
I wonder if the Pactor III protocol/code been published yet? If not it
would seem that PACTOR III is not legal on the HF bands in USA?
Has anything changed in the FCC regs to address the 300 baud limitation or
closed protocol issues???
My concern is if there becomes a large number of ARES/EMCOMM stations on HF
running PACTOR III will they stay within these narrow sub bands or spill
out from those frequencies and cause problems for RTTY and/or other digital
modes.
73 Phil NA4M
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