; Tue, 4 Jan 2005 16:49:09 +0100 Message-ID: <8840D182F8BB7540B173D2B1FA0CA9AB034FEE83@argos.clb.tcfr.thales> From: Jean-Louis.RAULT@fr.thalesgroup.com To: rsgb_lf_group@blacksheep.org Date: Tue, 4 Jan 2005 16:48:55 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) X-SPF-Result: relay.thorcom.net: 195.101.39.227 is neither permitted nor denied by domain of fr.thalesgroup.com X-Spam-Score: 0.2 (/) X-Spam-Report: autolearn=no,HTML_60_70=0.027,HTML_MESSAGE=0.001,NO_REAL_NAME=0.178 Subject: LF: Re: DI2AG 440KHz Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.9 required=5.0 tests=HTML_40_50,HTML_FONTCOLOR_BLUE, HTML_MESSAGE,NO_REAL_NAME 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 X-Spam-Filtered: by PlusNet SpamCORE (v3.00) Content-transfer-encoding: 8bit

Well, before sending you any reliable data, I would like to be sure that the QSB is not an artefact coming from my rig.

I'm presently using an ICOM IC738 as receiver and ARGO (by I2PHD/IK1as processing software.

The IC-738 has its own AGC working with a 400 Hz IF bandpass and ARGO has also its own software AGC which don't know exactly what the algorithm is.

So one can imagine that some other spurious signals close to 440,044 kHz (aero beacons or local QRM/QRN) could maybe affect the DI2AG S/N ratio on the ARGO displays.

What I propose is just to send you a few ARGO snapshots (150 ko each) tonite just to show you the QSB I'm talking about.

Within the next few days, I plan to record automatically some audio files at some specific times (midday, midnight, sunrise, sunset)

Storing audio raw data will allow me to play and replay and rereplay the samples with powerful FFT tools such as Spectrum Lab.

Jean-Louis

-----Message d'origine-----
De : owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org]De la part de Walter Staubach
Envoyé : mardi 4 janvier 2005 15:41
À : rsgb_lf_group@blacksheep.org
Objet : LF: Re: RE: Re: DI2AG 440KHz

Dear Jean-Louis,

         thank you very much for your interesting report. No, I havn`t got a statement like yours derived from such an amount of screenshots. I think, another OM made a remark like yours after obsering the beacon for a while. What do you think: Is it possible to reduce the amount of data reasonably and then transfer to me? DI2AG@fen-net.de ( My box has only 10MB ).

73    Walter

-----Ursprüngliche Nachricht-----
Von: Jean-Louis.RAULT@fr.thalesgroup.com <Jean-Louis.RAULT@fr.thalesgroup.com>
An: rsgb_lf_group@blacksheep.org <rsgb_lf_group@blacksheep.org>
Datum: Dienstag, 4. Januar 2005 14:47
Betreff: LF: RE: Re: DI2AG 440KHz

Walter et al.

I recorded your DI2AG sigs last night from 6 PM to 6 AM .

A quick exam on the 150 ARGO snapshots during my tea time early this morning  tend to show a deep QSB (period around 1 minute).

Have you got other similar remarks ?

73

Jean-Louis F6AGR

Loc. JN18DQ, near Paris

----- Original Message -----

From: Walter Staubach

To: RSGB LF

Sent: Sunday, January 02, 2005 5:07 PM

Subject: LF: DI2AG 440KHz

Dear All,

       at first happy new year to you.

And thank you very much for the response on my beacon testing. I got 27 mails - partly with screenshots - until now. Hope, the capacity of my harddisc will be sufficient ;-)

The mails came from G, LA, ON, F, DL. Tonight the beacon will operate QRSS10. Now DI2AG@fen-net.de is ready for use.

This morning I had some trouble in reading the mails from my account. While transfering the data the computer often stopped and the program crashed. No help? Yes, after searching for more than half an hour with my son I reduced the output of the 440KHz - that it was!

Keep in mind: Either 440KHz or computer, but not both;-)

Please dear friends give me your locator when reporting, it`s easier to calculate the distancies.

73

Walter