Re: LF: 2200m Plots of the whole Band

To:	[email protected]
Subject:	Re: LF: 2200m Plots of the whole Band
From:	Markus Vester <[email protected]>
Date:	Fri, 8 Jan 2016 14:20:35 -0500
Dkim-signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1452280836; bh=IXjAlMgHkcX8tyoLnHuwDEu7aYxYDMlqHWkcjwbgu0o=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=mcOjit6LAVQFC9y76Z7Dkhb1jfJUCrV6on+QneW8nlOibswQt3W61v8Xfff0y+L9Y h3ZSy3VSUVGp0h2Z6Q8i7Ie9fmmqI2gDPXaIfuhTbMuhCWcE8WTrtf6JboKmWWks3Q X5GOGBy62hrMe80+Upctgc4k6hp6+oVMOziwEeYw=
In-reply-to:	<[email protected]>
References:	<[email protected]>
Reply-to:	[email protected]
Sender:	[email protected]

Those gaps occur at +-30 Hz from each 200 Hz multiple, i.e. 137.77, 137.63, 137.57, 137.43, 137.37 kHz etc. They are only a few Hz wide and apparently caused by symmetries in the 200 baud, 2x170 Hz shift FSK modulation.

There are usually four hyper-active periods per day with very dense telegrams, the longest one occurring every evening around 21:20 to 22:50 UT.

Hartmut as you are fairly close to the DCF39 site, I would have expected even stronger sidebands in your spectrograms. Were these from your K9AY antenna pointing away from Burg?

Best regards,

Markus (DF6NM)

-----Ursprüngliche Mitteilung-----
Von: Hartmut Wolff <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Fr, 8 Jan 2016 7:46 pm
Betreff: LF: 2200m Plots of the whole Band

Here are plots of the whole 2200m Band from the past 2 Nights (about 1.5MB): https://dl.dropboxusercontent.com/u/50178231/LF/w136900_2016-01-07.JPG https://dl.dropboxusercontent.com/u/50178231/LF/w136900_2016-01-08.JPG My be its useful to find the gaps of the DCF39 Sideband for your transmissions. 73 Hartmut

<Prev in Thread]	Current Thread	[Next in Thread>
LF: 2200m Plots of the whole Band, Hartmut Wolff Re: LF: 2200m Plots of the whole Band, Markus Vester <= Re: LF: 2200m Plots of the whole Band, Hartmut Wolff Re: LF: 2200m Plots of the whole Band, Roger Lapthorn Re: LF: 2200m Plots of the whole Band, Hartmut Wolff Re: LF: 2200m Plots of the whole Band, Graham

Previous by Date:	Re: LF: Decca 5501, Andy Talbot
Next by Date:	LF: WD2XES WOLF again, John Andrews
Previous by Thread:	LF: 2200m Plots of the whole Band, Hartmut Wolff
Next by Thread:	Re: LF: 2200m Plots of the whole Band, Hartmut Wolff
Indexes:	[Date] [Thread] [Top] [All Lists]