[Skimmertalk] CW Skimmer Version 1.4 - improved accuracy for contesters, new free trial period
jmaass at k8nd.com
Mon Jan 19 09:55:17 EST 2009
Is there a revision history file associated with CW Skimmer?
Other than the improved performance, what changed in v1.4 over v1.3?
73, Jeff K8ND
> -----Original Message-----
> From: skimmertalk-bounces at contesting.com
> [mailto:skimmertalk-bounces at contesting.com] On Behalf Of Pete Smith
> Sent: Sunday, January 18, 2009 11:58 AM
> To: skimmertalk at contesting.com
> Subject: [Skimmertalk] CW Skimmer Version 1.4 - improved
> accuracy for contesters, new free trial period
> I have some good news to report for contester users of CW
> Skimmer. I have just finished a series of tests with Skimmer
> 1.4, to measure the improvement in two areas important to
> contesters, in particular
> . An excessive number of busted spots
> . An excessive number of cases where a caller was
> mis-identified as a runner and spotted when that should not
> have happened (called CQ/DE errors below).
> A little background first. Skimmer was originally intended
> primarily as a DXing tool, to facilitate cracking pileups.
> In this application, speed of identifying the desired station
> is a lot more important that whether or not the program also
> generates some busted spots. Last summer, Alex released a
> version of Skimmer that was intended to let users tailor
> Skimmer's callsign validation to fit their preferences. Four
> levels of validation were
> offered: Minimal and Normal, intended primarily for DXers,
> and Aggressive and Paranoid, intended largely for contesters.
> Now here's the good news. I tested version 1.3 and version
> 1.4 against a 10-minute excerpt from a recording of 40M,
> during the CQWPXCW last May, using a May 2008 master.dta file
> and Aggressive call validation. I listened to the recording
> for each spot that Skimmer made, and classified them as OK,
> busts, and CQ/DE errors.
> Here are the data:
> Version 1.3 1.4 Improvement
> Stations missed* -- 11 (of 92) --
> Busts 21 0 (!) >99%
> CQ/DE errors 15 3 80%
> *legitimate CQ's missed by the new version; in most cases,
> these stations were very weak or were only heard to CQ once
> during the 10-minute sample, for whatever reason.
> For anyone who wants to try this for himself, Alex has made
> Version 1.4 available for download from
> <http://www.dxatlas.com/>www.dxatlas.com for a 30-day free
> trial. People who earlier downloaded a trial can do so again
> with this version.
> 73, Pete N4ZR
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