Folks,
I really don't know if I am failing to understand the problem, or
underestimating the complexity of the solution, but I'd like to propose
at least a dialog here of what it would take to implement a busy
frequency detector. I'm not at all interested in discussing systems
that may or
Dave Bernstein wrote:
As is often the case in engineering, Jose, perfect is the enemy of
good. What Rick KN6KB discovered while developing SCAMP's busy
detector was that he could detect CW, PSK, Pactor, and SSB at an ~80%
confidence level without enormous difficulty. SCAMP beta testers
Ah so it's now time to pick on us stateside operators. Maybe if those in the
rest of the world who are having the same problem would speak up(wait John I
think I remember seeing you complain some), then this problem could worked out
to the best of ALL.
Kurt
K8YZK
- Original Message -
General process flow for a signal detector / frequency busy detector
implemented as a part of a semi-automated RF based client server message
transport system.
- A server (semi-automated which will respond to a request) is
listening on a fixed frequency and 'sampling' a given range
I was watching a bad PSK31 signal on 40M this morning, an IMD of -6
and harmonic waterfall 'trails all over my 3 Khz wide display. Do
official observers ever get involved in these cases ? Seems that
friendly pink slips might be useful here .
--
Andy K3UK
Skype Me : callto://andyobrien73
And I think that Rick, KN6KB, was being modest about the 80% detection.
I did not find that the software would ever transmit on what I, as a
human, would have considered a busy frequency. However, there were times
that it did not want to transmit because of what it perceived as a busy
Just a few thoughts:
* A busy detector is not a panacea for all qrm, especially as you look
at the lower bands. I can easily lay out a scenario for 80 meters or
daytime on 40m where the PMBO should transmit when the freq is busy.
This scenario happens less as you expand the skip zones on the
Suggestion: Don't wait for an OO. Look up his call at QRZ.com, get
his phone number, give him a call and talk to him about the
problem. The op probably does not know that he is over-driving his audio.
Chuck AA5J
At 08:00 AM 3/10/2007, Andrew O'Brien wrote:
I was watching a bad PSK31 signal
It sounds to me that a confidence level like that simply means it knows
what signal mode it is hearing. Personally, it would appear to me that the
question is :Is there another signal of ANY kind on the frequency? If
there is, it should NOT attempt to use the frequency, unless it is the SAME
--- In digitalradio@yahoogroups.com, Chuck Mayfield [EMAIL PROTECTED]
wrote:
Suggestion: Don't wait for an OO. Look up his call at QRZ.com, get
his phone number, give him a call and talk to him about the
problem. The op probably does not know that he is over-driving his
audio.
I've
jgorman01 wrote:
Just a few thoughts:
* A busy detector is not a panacea for all qrm, especially as you
look at the lower bands. I can easily lay out a scenario for 80
meters or daytime on 40m where the PMBO should transmit when the freq
is busy. This scenario happens less as you
Seems all the stateside operators want to do is argue.
Is the plan to go back to the fundementals of this group, or do we
set up a new one where policy arguments would be punted?
John VE5MU
Fellows, injecting national slurs into *any* ham radio discussion is a
spectacularly bad idea.
them, like a certain kt4* who doesn't seem capable
of ever turning his
amp off.
- Rich
Ive done it with several ops also. 1 has said thanks,
most say F you :D.
And ya the KT4 doesnt seem to understand PSK31 is just
fine without running full gallon ... and sounding like
crap.
I have been lobbying the WinLink team to do this for years, without
success. You are more than welcome to try, Jose.
73,
Dave, AA6YQ
--- In digitalradio@yahoogroups.com, Jose A. Amador [EMAIL PROTECTED]
wrote:
Dave Bernstein wrote:
As is often the case in engineering, Jose,
I would just tell the operator directly; in my experience, they're
usually appreciative, and can't wait to race off and fix the problem.
73,
Dave, AA6YQ
--- In digitalradio@yahoogroups.com, Andrew O'Brien
[EMAIL PROTECTED] wrote:
I was watching a bad PSK31 signal on 40M this
AA6YQ comments below
--- In digitalradio@yahoogroups.com, jgorman01 [EMAIL PROTECTED] wrote:
Just a few thoughts:
* A busy detector is not a panacea for all qrm, especially as you look
at the lower bands. I can easily lay out a scenario for 80 meters or
daytime on 40m where the PMBO should
mulveyraa2 wrote:
I think I've actually gotten a Thanks! I'll drop my drive level down
next time maybe twice. A few never responded back, and the
remainder were of the F-you, there's nothing wrong with my signal or
equipment style. Needless to say, you can recognize the same guys
over
Striking your keyboard's PrintScreen button will place an image of
the entire screen in the Windows Clipboard. Depressing the Alt key
while striking PrintScreen will place an image of the currently-
active window in the Windows Clipboard; this is the recommended
approach. PrintScreen is often
Hey I'm one of the first to complain about WINLINK knocking out a QSO, and it
is usually during a DX contact that it happens
What I can't understand is the constant complaining about big bad old winlink,
with the arguments going around and around.
I don't have to operate in the middle of the
Roger J. Buffington wrote:
That is certainly disappointing. What software do you use to take a
screenshot? Will it work with MixW?
de Roger W6VZV
You could try with a simple Print Screen dump to the clipboard, and then
paste it to Paint, Photoshop or whatever.
I use Gadwin Print Screen
The WinLink folks have run a long and effective campaign of
disinformation. They claim that most of the QRM caused by WinLink
PMBOs either is the fault of a WinLink user who called on a busy
frequency, or isn't really QRM because the victim was running
panoramic reception and thus had his or
Dave Bernstein wrote:
..
So why don't we just not operate in the middle of automatic
stations and shut up, as you suggest? Two reasons:
1. unattended automatic stations with a bandwidth of 500 hz or less
can run anywhere in the data bands, so there is no safe frequency
2.
John,
We have gone over some of this a number of times, but perhaps you missed
it. The Winlink 2000 programmer abandoned further work on the SCAMP mode
because there is mostly one programmer as they don't work with many
other hams on this. The have a closed view of the system and has been
- Original Message -
From: John Becker [EMAIL PROTECTED]
To: digitalradio@yahoogroups.com
Sent: Thursday, March 08, 2007 6:01 PM
Subject: Re: [digitalradio] Re: 3580kHz-3600kHz Freq Coordination Info
After looking at the winlink position report page there must
be 50 or so hams at
--- In digitalradio@yahoogroups.com, Andrew O'Brien
[EMAIL PROTECTED] wrote:
I was watching a bad PSK31 signal on 40M this morning, an IMD of -6
and harmonic waterfall 'trails all over my 3 Khz wide display. Do
official observers ever get involved in these cases ? Seems that
friendly pink
--- In digitalradio@yahoogroups.com, Roger J. Buffington
[EMAIL PROTECTED] wrote:
mulveyraa2 wrote:
That is certainly disappointing. What software do you use to take a
screenshot? Will it work with MixW?
de Roger W6VZV
Click ALT-PRTSCREEN and then click Paste directly into your email
Sorry to hear about your system being on a holiday from digital radio.
There is no Winlink 2000 organization that you can work from within. It
is basically a closed group of maybe half a dozen (at most) owners. They
dictate all the terms to the amateur community and tell us how we are
--- In digitalradio@yahoogroups.com, Jose A. Amador [EMAIL PROTECTED] wrote:
Not a big problem if the activity detector senses the maximum
possible bandwidth to be possibly used. P3 exchanges are full
bandwidth for the server (some 2.4 kHz) and P2 bandwidth (500 Hz)
for the ARQ responses.
Ask yourself why scamp died. Do you really think the winlink users
who have spent a thousand dollars or more on pactor modems are going
to relish throwing that investment away because the winlink admin's
have decided to go to a soundcard mode?
Jim
WA0LYK
--- In digitalradio@yahoogroups.com,
On 3/10/07, Brad [EMAIL PROTECTED] wrote:
while the offending ZL was on air
and he received the email between transmissions, called me on psk and
asked for advice. Instant results!
Brad VK2QQ
A ZL called a VK for advice ! What is the world coming to ?
Andy K3UK
(from near Thirlmere)
Guys,
Like I have said before, the only way to solve this is to designate a certain
portion on each band just for this type of communications.
I just don't understand anyone would spend thousand of dollars on radios,
antennas, computers and other related hardware just to pass email.
Joe
I agree with your point, Jim. However, it doesn't explain the failure
of the WinLink organization to incorporate the SCAMP busy detector in
each of their PMBOs. This would have no impact on WinLink users, and
minimal $ impact on PMBO operators.
73,
Dave, AA6YQ
--- In
Other folks would say I just don't understand anyone would spend
thousand of dollars on radios, antennas, computers and other related
hardware just to exchange signal reports with someone you could more
easily talk to on Skype.
Other than keeping it non-commerical, we should avoid any attempt
Ok, here's a question I don't know how to answer since I don't have the
experience.
Let's say I am running my IC-746PRO on PSK31 and passing disaster relief
traffic
in and out of a disaster area. If the station I am working on the other end
can't decode me and I am also having trouble
--- In digitalradio@yahoogroups.com, Walt DuBose [EMAIL PROTECTED] wrote:
if I turn on my linear is that Ok or should I just give up and wait for
better conditions?
Walt/K5YFW
K5? Sure, crank it up.
During an emergency you can pretty much do whatever it takes to get your
message through.
But if you can't decode him turning up your power won't help.
- Original Message -
From: Walt DuBose
To: digitalradio@yahoogroups.com
Sent: Saturday, March 10, 2007 8:10 PM
Subject:
_
From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED] On
Behalf Of Andrew O'Brien
A ZL called a VK for advice ! What is the world coming to ?
Just some big brotherly advice.
Andy K3UK
(from near Thirlmere)
Hmm, I would expect better signals from you!
Brad VK2QQ
Hmm, not really ham radio related but my atomic clock just leap
forward an hour at 11.30PM Eastern Time (USA). Did WWV not have the
patience to wait until the official date and time ?
--
Andy K3UK
Skype Me : callto://andyobrien73
www.obriensweb.com
Joint TAPR/AMSAT Banquet at Dayton 2007
For many years, AMSAT and TAPR have held competing Hamvention dinners
on Friday evening. Given the tremendous overlap in membership and
interest between the two groups, this has always required tough choices.
We're pleased to announce that this year,
* 2007 ARRL/TAPR Digital Communications Conference issues call for papers:
Technical papers are solicited for presentation at the 26th annual ARRL/TAPR
Digital Communications Conference (DCC), Friday-Sunday, September 28-30, in
Hartford, Connecticut. Papers will also be published in the
I from the original Thirlmere area.
On 3/10/07, Brad [EMAIL PROTECTED] wrote:
--
*From:* digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED]
*On Behalf Of *Andrew O'Brien
A ZL called a VK for advice ! What is the world coming to ?
Just some big brotherly
And I will be visiting that QTH in about 6 weeks!
_
From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED] On
Behalf Of Andrew O'Brien
Sent: Sunday, 11 March 2007 3:43 PM
To: digitalradio@yahoogroups.com
Subject: Re: [digitalradio] Re: Bad PSK signals ?
I from the original
42 matches
Mail list logo
