Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

Re: VLF: Back on 5.17 kHz / 58 km...

To: [email protected]
Subject: Re: VLF: Back on 5.17 kHz / 58 km...
From: Paul Nicholson <[email protected]>
Date: Tue, 3 Jan 2017 08:07:09 +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=vnqybQQzIoeizxB6jkwOzNny2Jh1N43mKH/c/5V/QA0=; b=3CiURgfVrLK8ycnt8Dw8jP7jTX FPcEQa/eA8i/GXHA7UcNoN8FpsCDMMzZBwcb5AyL8u1NG2/3gLFCesohyhSL+7ThnFtrtO7MPfp4b Hoqi1e5vcqsHrkmf+EveZMfjyfx7I0rCwO2SsxZYO55H+UsePfR8JcghJHfSwtqTubRM=;
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]>
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
Stefan wrote:

> f = 5170.000000 Hz
> Start time: 02.Jan.2017   17:00:00 UTC
> Symbol length: 40 s
> Characters: 5
> CRC 16
> Coding 16K25A

Received 'HELLO', BER 41.1%, constant reference phase.

Carrier Eb/N0 = +1.0 dB, S/N: 15.57 dB in 22.3 uHz,

A little weaker than expected.

S/N -64.9dB in 2.5kHz after sferic blanking.  Before the blanker,
the signal measures -74.8dB after hum removal.


Markus wrote:

> SpecLab resets the phase of it's GPS-locked signal
> generators at midnight.

Ah, that would explain it, thanks.  Now you mention it, I think
we've hit that problem before but I had forgotten.

I measure a phase advance of 131 degrees at midnight.

We had better stick to frequencies that are a whole number of
cycles per day.   That also simplifies coherent stacking of
daily transmissions.

Jim wrote:

> Was the LWPC TX antenna angle parameter fairly close to
> actual angle?

I'm not sure what you mean there.

--
Paul Nicholson
--

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