Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

Re: LF: EbNaut 137.477 kHz 1 Dec

To: [email protected]
Subject: Re: LF: EbNaut 137.477 kHz 1 Dec
From: Paul Nicholson <[email protected]>
Date: Sat, 3 Dec 2016 16:20:38 +0000
Dkim-signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=abelian.org ; s=default; h=Content-Transfer-Encoding:Content-Type:In-Reply-To: MIME-Version:Date:Message-ID:From:References:To:Subject:Sender:Reply-To:Cc: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=Hy6iZAUh4nBh/g8MJdtW1RzovjGh9eAfVfZ9R9Zrzfc=; b=InX167RF7AfF85lnhpqXByYCJw vrbEMmH8ZXUwZ56h7JVCgbwSXb4RSRRB4Wgry+MJyAq762/KxHkaH8c1+IGO4hPz6Mg6WufFszfX3 wUO0knd0ItpaL9NXUZ/h7ZrJTApD2wV8D+XpFId4o0tZf+uEIzMcM1Jz9xhy8uPsr1ms=;
In-reply-to: <CAC+C6w5CX1nT_kZ6G8pS1hKAKJt_J-3DDy24KrboC=RBm7kSbQ@mail.gmail.com>
References: <[email protected]> <[email protected]> <CAC+C6w5CX1nT_kZ6G8pS1hKAKJt_J-3DDy24KrboC=RBm7kSbQ@mail.gmail.com>
Reply-to: [email protected]
Sender: [email protected]
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.8.0

Nice work Joe and Domenico.  Thanks for linking the wav files,
I downloaded and reproduced the three decodes using the Linux
decoder to get exactly the same results.

I wanted to see if normalising for amplitude variation made
any difference with the LF signals.

It didn't, the background noise is very constant so there is
negligible normalisation effect.

> not bad for a message of 63 characters on LF sent in less
> than 30 minutes !

The 02:00 decode: -39.6dB in audio bandwidth, 2.3 characters
per minute, 62% of channel capacity.

Domenico, if you want to upload the unsuccessful wavs, I can
check them to see how far short of a decode they were.

--
Paul Nicholson
--

<Prev in Thread] Current Thread [Next in Thread>