Message-ID: <50589124.1040508@iup.uni-heidelberg.de>
Date: Tue, 18 Sep 2012 17:20:04 +0200
From: =?ISO-8859-15?Q?Stefan_Sch=E4fer?= <Stefan.Schaefer@iup.uni-heidelberg.de>
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To: rsgb_lf_group@blacksheep.org
CC: Joe Taylor <joe@Princeton.EDU>,
        Edgar J Twining <edgarjtwining@virginbroadband.com.au>
Subject: LF: WSPR tests by DK7FC
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Dear LF group,

A few days we started a discussion about a slower WSPR here in the 
group. After that, i've been in contact with K1JT who meant he will work 
out a slower WSPR version for LF, in a few months (hopefully).

Markus/DF6NM kindly prepared a tool to generate different types of WSPR. 
There are 3 versions. The first takes 2 minutes, i.e. the normal WSPR 
that can be decoded with the normal WSPR software. Then there are slower 
versions taking 8 and 32 minutes.

We want to make some pre-tests to see the SNR improvement of a slower 
WSPR, i.e. check if it will be confirmed by the SNR display that WSPR-8 
shows a 6 dB better SNR (12 dB SNR improvement for WSPR-32 respectively).

Hopefully this will result in a new DX-mode on LF (Yes Mal, i know :-) ).

So now i joined the WSPR group and start to do some test transmissions 
with the normal 2 minute WSPR code, using Markus' tool. The goal is to 
see if the tool works properly and what decode levels i can obtain in 
various distances.

A 2 minute WSPR beacon is running here in Heidelberg / JN49IK, 50% TX 
time. I will run it until tomorrow 6 UTC.

Reports apprechiated :-)

Please can we try to move the LF reports/hour peak in the diagram above 
the level of the 20m band? ;-)

Tests using the 8 and 32 minute WSPR will follow soon.

73, Stefan/DK7FC

PS: TX pwr may be a bit reduced in first tests, abt. - 10 dB f.s.