Let me drill down on this some more to find out the prevailing view...
Would those that object to Bonnie's idea, also object if the wide modes
were not part of the issue?. How about these objections if there was a
digital mode under 500 Hz that transmitted unattended under automatic
control? It
Andy,
I petitioned the FCC for just that (inside the automatic subbands),
but it was rejected for the status quo. So-called semiautomatic
operations is permitted anywhere RTTY/data is permitted as long as the
bandwidth does not exceed 500 Hz. For fully automatic operations, the
automatic
I for one can tell you first hand what happens
if for any reason you should disagree with her.
John
i have been there too Remember wide band digital on 6 and 2 meters ?
The problem with that group Of digihams is they don't care what what what they
want will do to all the other users after all we are legacy users a bunch
of old phooeys who are holding back the new ham
--- In digitalradio@yahoogroups.com, AA0OI aa...@... wrote:
HI Bob:
That LSB on 40 usb on 20.. a bunch in there on 40 right now
Garrett / AA0OI
What is the best time CDST, day/night to look for digital sstv activity on 7173?
Thanks,
Jerry - K0HZI
Hi Jerry:
there is activity on 7.173 all day long starting about 8am cst and going to 5
or 6 pm at night..(depends on when the European station start coming in---
they pretty much don't care who they step on-- of course some just don't hear
so well,, (kind of like contesters)) Band is in bad
If there were no means for such stations to avoid transmitting atop
detectable on-going QSOs, I might consider supporting such a proposal. Busy
frequency detection, however, is demonstrably feasible and practical.
Rewarding the long-term rude behavior of ops running unattended
semi-automatic and
I've seen (but not yet read) references to this in the SDR world.
Out of interest what would you have in mind?
Simon Brown, HB9DRV
http://sdr-radio.com
From: digitalradio@yahoogroups.com [mailto:digitalra...@yahoogroups.com] On
Behalf Of Dave AA6YQ
Busy frequency detection,
Busy detection in case of QRP Olivia 500/32 signals about snr -17dB is
myth.
73, Jaak
es1hj/qrp
8.04.2010 19:41, Dave AA6YQ kirjutas:
If there were no means for such stations to avoid transmitting atop
detectable on-going QSOs, I might consider supporting such a proposal.
Busy frequency
Rick KN6KB developed an effective busy frequency detector that he included
with his implementation of the SCAMP protocol several years ago. A
high-level description of SCAMP is available via
http://www.eham.net/articles/9785
RIck was initially reluctant to develop a busy-frequency detector
Myth?
Now there's a challenge - I must read all this SDR documentation to see just
what is defined as a busy frequency. At the moment I'm wading through 4,500
pages of DSP API's, there's something in there.
Simon Brown, HB9DRV
http://sdr-radio.com
From: digitalradio@yahoogroups.com
Thanks, I'll leave Rick alone at the moment as I know he's busy.
Even if we were able to write a DLL which indicates that a frequency is in
use others may just decide that their traffic is more important and ignore
it.
Simon Brown, HB9DRV
http://sdr-radio.com
From:
AA6YQ comments below
-Original Message-
From: Jaak Hohensee [mailto:jaak.hohen...@eesti.ee]
Sent: Thursday, April 08, 2010 2:50 PM
To: digitalradio@yahoogroups.com
Cc: Dave AA6YQ
Subject: Re: [digitalradio] Unattended narrow mode transmission protection
Busy detection in case of QRP
Hello all
Last sunday I had JASON fast-turbo QSO with UT5UBB, 33dBm. Just a half
time ontop started some automatic station. Before the Jason signal was
clear in wtrfl.
I´m not totally against the automatic station. Some of these serve all
our ham-community like beacons. But some servs only
I'll accept Dave and Skip's comments as valid points. BTW, the busy detect
does work quite well in Winmor. Simon, I did not have a particular digital
mode in mind, I was just exploring the receptivity to the overall concept of
unattended operations, if wide was eliminated from the discussion.
Andy,
The issue for me has less to do with bandwidth than operating methodology. The
same problems exist independent of bandwidth; although wider bandwidth modes
certainly exasperate the situation. I agree that Winlink servers scanning
multiple frequencies is a poor use of limited frequency
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