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LF: RE: RE: WSPR Reports

To: <[email protected]>
Subject: LF: RE: RE: WSPR Reports
From: <[email protected]>
Date: Wed, 27 Jan 2010 22:00:14 +0100
Importance: Normal
In-reply-to: <BF4A524700075746A6467658DFC7102C1284D4B329@ICTS-S-EXC2-CA.luna.kuleuven.be>
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Hello Rik,Andy,
 
normally I use a 250 Hz USB filter for wspr,I get decodes down to -32 dB although rare...
 
73
 
Victor
-----Oorspronkelijk bericht-----
Van: [email protected] [mailto:[email protected]]Namens Rik Strobbe
Verzonden: woensdag 27 januari 2010 21:33
Aan: [email protected]
Onderwerp: LF: RE: WSPR Reports

Andy,
 
maybe the "magic" lies in a narrow filter (either IF or audio).
If I switch from a 2.5kHz (SSB) filter to a 270 Hz filter I also get a significant increase in SNR values reported by WSPR.
Unfortunaely it hardly affects the decoding level (minimal SNR needed to get a positive decode), that rises by almost the same amount.
 
73, Rik  ON7YD - OR7T

Van: [email protected] [[email protected]] namens Andy Talbot [[email protected]]
Verzonden: woensdag 27 januari 2010 21:26
Aan: [email protected]
Onderwerp: LF: WSPR Reports

Has F6CNI managed some sort of magic noise reduction system, or is it a just a case of being in a very quiet location...
These are pretty impressive S/N values
 
 
 2010-01-27 20:14   G4JNT   0.503875   +13   0   IO90iv   +23   0.200   F6CNI   JN19qb   391   243 
 2010-01-27 20:08   G4JNT   0.503875   +10   0   IO90iv   +23   0.200   F6CNI   JN19qb   391   243 
 2010-01-27 20:02   PA0A   0.503900   +15   0   JO33de   +37   5.012   F6CNI   JN19qb   502   312 
 2010-01-27 20:00   G4JNT   0.503875   +14   0   IO90iv   +23   0.200   F6CNI   JN19qb   391   243 
 2010-01-27 19:54   G7NKS   0.503920   -5   0   IO92ub   +20   0.100   F6CNI   JN19qb   422   262 
 2010-01-27 19:54   G4JNT   0.503875   +14   0   IO90iv   +23   0.200   F6CNI   JN19qb   391   243 
 2010-01-27 19:44   G4JNT   0.503875   +10   0   IO90iv   +23   0.200   F6CNI   JN19qb   391   243 
 2010-01-27 19:40   PA0A   0.503900   +15   0   JO33de   +37   5.012   F6CNI   JN19qb   502   312 
 
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