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[195.171.43.25]) by mx.google.com with ESMTP id da6si7639296wjc.57.2013.08.03.19.28.10 for ; Sat, 03 Aug 2013 19:28:11 -0700 (PDT) Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) smtp.mail=owner-rsgb_lf_group@blacksheep.org Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1V5mOP-0005lz-Jf for rs_out_1@blacksheep.org; Sun, 04 Aug 2013 01:41:53 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1V5mOO-0005lk-Vj for rsgb_lf_group@blacksheep.org; Sun, 04 Aug 2013 01:41:52 +0100 Received: from relay2.uni-heidelberg.de ([129.206.210.211]) by relay1.thorcom.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.77) (envelope-from ) id 1V5mOM-0002wv-EX for rsgb_lf_group@blacksheep.org; Sun, 04 Aug 2013 01:41:51 +0100 Received: from freitag.iup.uni-heidelberg.de (freitag.iup.uni-heidelberg.de [129.206.29.204]) by relay2.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id r740fnFC016854 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sun, 4 Aug 2013 02:41:49 +0200 Received: from [129.206.22.206] (pc206.iup.uni-heidelberg.de [129.206.22.206]) by freitag.iup.uni-heidelberg.de (8.12.11.20060308/8.11.2) with ESMTP id r740fjdx023684 for ; Sun, 4 Aug 2013 02:41:45 +0200 Message-ID: <51FDA348.9060804@iup.uni-heidelberg.de> Date: Sun, 04 Aug 2013 02:41:44 +0200 From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <51FC40B3.8060307@virginbroadband.com.au> <652B496A852640E69B77E2F9B2F1D1AF@White> In-Reply-To: <652B496A852640E69B77E2F9B2F1D1AF@White> X-Spam-Score: -3.8 (---) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hi Markus, Edgar, Well i think it is most promising to start with the good old DFCW-180. If the success is clear and if there is no other station announcing RX attempts, then we could continue to try other modes. Markus, we're running DFCW-180 in 11 mHz, not DFCW-90. This has proved to be the best combination, at least from my point of view. [...] Content analysis details: (-3.8 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [129.206.210.211 listed in list.dnswl.org] -1.5 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: bf14357d5ee2e4a717b88d90ab36122c Subject: Re: LF: DK7FC Equinox reception Content-Type: multipart/alternative; boundary="------------030005010000020603020105" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_20_30,HTML_MESSAGE autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false Status: O X-Status: X-Keywords: X-UID: 2273 This is a multi-part message in MIME format. --------------030005010000020603020105 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Hi Markus, Edgar, Well i think it is most promising to start with the good old DFCW-180. If the success is clear and if there is no other station announcing RX attempts, then we could continue to try other modes. Markus, we're running DFCW-180 in 11 mHz, not DFCW-90. This has proved to be the best combination, at least from my point of view. Your table states that a detection in OP-32, using your correlation software, would result in a clear decode if the signal is as good as "M" copy in 11 mHz, right? What happens if there is QSB during that time? The events of > 30 minutes without QSB are quite rare i think. It looks like i have to use a kite antenna here on the building :-) 73, Stefan/DK7FC Am 03.08.2013 13:47, schrieb Markus Vester: > Hi Edgar, LF, > this looks like a great project, and it's good to see a live grabber > from VK7 again. So with that extra distance you might reach the top > three in the DX list... unless Mike, Bob, or someone else takes the > challenge and picks up Stefan in ZL ;-) > Orford - that's surely a nice location. On the occasion of attending a > conference some 15 years ago, we were lucky enough to be able to drive > around the Tasmanian east cost for a few days. We were much impressed > by the beauty of the landscape, the clear skies, and the friendly and > easygoing manner of the inhabitants. > Are Stefan and you intending to focus on DFCW only, or try other modes > as well? Attached beneath is a short table, lining up approximate > sensitivities for a few weak-signal options. > Best 73, > Markus (DF6NM) > > Mode norm.SNR SNR bandw. duration remarks > dBHz dB mHz minutes > carrier -18 14 0.4* >30 highly significant peak in 0.4 mHz > spectrum > DFCW-90 -12 6 11* 42 marginal "M" detection in spectogram > DFCW-90 -6 12 11* 42 fully readable "O" > Opera-32 -1 8 125 33 reliable decoding by Opera software > Opera-32 -12 21 0.5 33 correlation detection of a > coherent transmission > WSPR-15 -4 3.5 180 15 decoding by WSPRX software > WSPR-30 -7 3.5 90 30 accelerated replay to WSPR software > MFSK37 -9 14 3.3* 25 visual decode or automated peak > search > Notes: > - SNR thresholds are only approximate. > - SNR referenced to carrier power (not average). > - normalized SNR in 2.5 kHz can be obtained by subtracting 34 dB from > dBHz. > * noise bandwidth is 1.5 times the stated FFT bin width. > - duration to send "DK7FC" message (19 dashes and 4 spaces). > - MFSK37 is absolute frequency keying, sending one 5 minute dash per > character. > > *From:* edgar > *Sent:* Saturday, August 03, 2013 1:28 AM > *To:* rsgb_lf_group@blacksheep.org > *Subject:* LF: DK7FC Equinox reception > > Hi, > > During the last three Equinoxes I have attempted to receive DK7FC's > signal at QE37pd, Moonah, Tasmania. > > The best result was achieved last April. > > Refer to: > https://dl.dropboxusercontent.com/u/101251787/DK7FC%20reception.pdf > > I decided for next Equinox period, (20th September 2013), that I would > attempt to better the distance previously achieved. > > The results will be available on the internet. > > https://dl.dropboxusercontent.com/u/101251787/testIDC.html > > At present the equipment is set-up at QE37pd, and when possible Stefan > is running test transmissions from 19:00 to 22:00 UTC. > > By the middle of August the system is to be set-up at Orford, on the > east coast of Tasmania, to operate until the end of September. > > http://no.nonsense.ee/qthmap/?qth=QE37wk > > The frequencies of DCF39 and HGA22 signals are also being monitored to > determine the propagation. > > So I invite members to participate by monitoring the progress via the > web images. > > Regards, Edgar > Moonah, Tasmania. > --------------030005010000020603020105 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Hi Markus, Edgar,

Well i think it is most promising to start with the good old DFCW-180. If the success is clear and if there is no other station announcing RX attempts, then we could continue to try other modes.
Markus, we're running DFCW-180 in 11 mHz, not DFCW-90. This has proved to be the best combination, at least from my point of view.

Your table states that a detection in OP-32, using your correlation software, would result in a clear decode if the signal is as good as "M" copy in 11 mHz, right? What happens if there is QSB during that time? The events of > 30 minutes without QSB are quite rare i think. It looks like i have to use a kite antenna here on the building :-)

73, Stefan/DK7FC

Am 03.08.2013 13:47, schrieb Markus Vester:
Hi Edgar, LF,
 
this looks like a great project, and it's good to see a live grabber from VK7 again. So with that extra distance you might reach the top three in the DX list... unless Mike, Bob, or someone else takes the challenge and picks up Stefan in ZL ;-)
 
Orford - that's surely a nice location. On the occasion of attending a conference some 15 years ago, we were lucky enough to be able to drive around the Tasmanian east cost for a few days. We were much impressed by the beauty of the landscape, the clear skies, and the friendly and easygoing manner of the inhabitants.
 
Are Stefan and you intending to focus on DFCW only, or try other modes as well? Attached beneath is a short table, lining up approximate sensitivities for a few weak-signal options.
 
Best 73,
Markus (DF6NM)
 

Mode    norm.SNR SNR bandw. duration  remarks
          dBHz    dB   mHz   minutes
carrier   -18     14   0.4*   >30     highly significant peak in 0.4 mHz spectrum
DFCW-90   -12      6    11*    42     marginal "M" detection in spectogram
DFCW-90    -6     12    11*    42     fully readable "O"
Opera-32   -1      8   125     33     reliable decoding by Opera software
Opera-32  -12     21   0.5     33     correlation detection of a coherent transmission
WSPR-15    -4    3.5   180     15     decoding by WSPRX software
WSPR-30    -7    3.5    90     30     accelerated replay to WSPR software
MFSK37     -9     14   3.3*    25     visual decode or automated peak search
 
Notes:
- SNR thresholds are only approximate.
- SNR referenced to carrier power (not average).
- normalized SNR in 2.5 kHz can be obtained by subtracting 34 dB from dBHz.
* noise bandwidth is 1.5 times the stated FFT bin width. 
- duration to send "DK7FC" message (19 dashes and 4 spaces).
- MFSK37 is absolute frequency keying, sending one 5 minute dash per character.

From: edgar
Sent: Saturday, August 03, 2013 1:28 AM
Subject: LF: DK7FC Equinox reception

Hi,

During the last three Equinoxes I have attempted to receive DK7FC's
signal at QE37pd, Moonah, Tasmania.

The best result was achieved last April.

Refer to:
https://dl.dropboxusercontent.com/u/101251787/DK7FC%20reception.pdf

I decided for next Equinox period, (20th September 2013), that I would
attempt to better the distance previously achieved.

The results will be available on the internet.

https://dl.dropboxusercontent.com/u/101251787/testIDC.html

At present the equipment is set-up at QE37pd, and when possible Stefan
is running test transmissions from 19:00 to 22:00 UTC.

By the middle of August the system is to be set-up at Orford, on the
east coast of Tasmania, to operate until the end of September.

http://no.nonsense.ee/qthmap/?qth=QE37wk

The frequencies of DCF39 and HGA22 signals are also being monitored to
determine the propagation.

So I invite members to participate by monitoring the progress via the
web images.

Regards, Edgar
Moonah, Tasmania.

--------------030005010000020603020105--