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Re: [RTTY] Skimmer spots dropped at VE7CC cluster node

To: <rtty@contesting.com>, "Pete Smith N4ZR" <n4zr@contesting.com>
Subject: Re: [RTTY] Skimmer spots dropped at VE7CC cluster node
From: "Jim W7RY" <w7ry@centurytel.net>
Reply-to: Jim W7RY <w7ry@centurytel.net>
Date: Mon, 5 Oct 2015 04:16:12 -0700
List-post: <rtty@contesting.com">mailto:rtty@contesting.com>
Probably not. Using FSK generated by DOOK (5 KHZ AFSK) and converted to FSK
from 2-Tone.
Icom IC7600


What it really looks like is the skimmer software has poor decode. If you
look closely at the busted calls, the calls are very similar.

So more of poor decode than too close to someone. LOTS of busted calls are off by one
letter.




Thanks
73
Jim W7RY


-----Original Message----- From: Pete Smith N4ZR
Sent: Monday, October 05, 2015 3:36 AM
To: rtty@contesting.com
Subject: Re: [RTTY] Skimmer spots dropped at VE7CC cluster node

Or conceivably because of less than perfect AFSK (bit jitteror
distortion from overdrive?)

73, Pete N4ZR
Download the new N1MM Logger+ at
<http://N1MM.hamdocs.com>. Check
out the Reverse Beacon Network at
<http://reversebeacon.net>, now
spotting RTTY activity worldwide.
For spots, please use your favorite
"retail" DX cluster.

On 10/4/2015 9:18 PM, Lee Sawkins wrote:
You get busted because you are too close in frequency and call to W7RN or
W7DRM and they were there first.

73 Lee

----- Original Message -----

From: "Jim W7RY" <w7ry@centurytel.net>
To: "Lee Sawkins" <ve7cc@shaw.ca>, rtty@contesting.com
Cc: dezrat@outlook.com
Sent: Sunday, October 4, 2015 11:41:44 PM
Subject: Re: [RTTY] Skimmer spots dropped at VE7CC cluster node

So why am I in the busted list 41 times?

73
Jim W7RY



-----Original Message-----
From: Lee Sawkins
Sent: Wednesday, September 30, 2015 6:19 PM
To: rtty@contesting.com
Cc: dezrat@outlook.com
Subject: [RTTY] Skimmer spots dropped at VE7CC cluster node

These links may be interesting to some of you. These are the typical
rejected spots of any CC Cluster.

RTTY skimmer spots are considered valid if spotted by ONE Skimmer. RTTY
Skimmers are generally more accurate than CW and there are simply not
enough
of them to use 2 or more Skimmers to validate them. CW spots are valid if
spotted by 2 or more Skimmers.

Here is the list of dropped Skimmer spots by the VE7CC-1 cluster.
If you connect to the RBN directly, you will receive all these spots as
well
as the good ones.

Many times there are two calls in succession that are dropped for RTTY
calls. I am receiving data from both the RBN and DL4RCK for redundancy.
Usually they both spot the same RTTY calls.

Most columns are self explanatory.

The number directly before a skimmer call is a quality number. It is the
number of times a call has been detected as correct minus the number of
times it is busted. When the number decreases below 5, it is no longer
considered valid. If the active call has not been spotted in 12 minutes it
is also no longer considered valid. In one place, for 9A1A the quality
number is over 2000. This means 9A1A has been spotted over 2000 times on
the
same frequency!
"Sysop added" means I have manually added a call to the list because it is
busted all the time and is never good.

http://www.bcdxc.org/ve7cc/ccc/Busted-26-Sep-2015.txt
http://www.bcdxc.org/ve7cc/ccc/Busted-27-Sep-2015.txt

Lee
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