Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-df05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 7BA78380000BF; Sun, 29 Apr 2012 15:59:43 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1SOaGe-0007TD-7K for rs_out_1@blacksheep.org; Sun, 29 Apr 2012 20:58:48 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1SOaGd-0007T4-Ba for rsgb_lf_group@blacksheep.org; Sun, 29 Apr 2012 20:58:47 +0100 Received: from mail-we0-f171.google.com ([74.125.82.171]) by relay1.thorcom.net with esmtps (TLSv1:RC4-SHA:128) (Exim 4.77) (envelope-from ) id 1SOaGa-0001qo-7U for rsgb_lf_group@blacksheep.org; Sun, 29 Apr 2012 20:58:46 +0100 Received: by werf13 with SMTP id f13so2829489wer.16 for ; Sun, 29 Apr 2012 12:58:43 -0700 (PDT) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=n54V90Qg5I9ZGHZovskimRuZZ7EDOHKhzPSXRUXg/Hs=; b=xZBRm57PS/lurwtVANbd/vocJwHtxeWmKyqtJbnK7DkcN0+Lp94Razl4DiV2wOhdYc DHiXnWmbOtEjEJav7wNqtPSClaIk2f/l6FKuRylo0OfMelCgAG7zjQjlFQjgCc2jItUW JkBCZQhRtG/rK3FNbOW+5oMvfOHPWHkV8KWMOLgrMwdIjX8zHsxbJK6Ru4E10Q3pvqlq BwdZUf77Xtwj/pkaPckl+FFq1bzZQ9Mx9AR9cu7v8OBgUwYaGKmsUkBqLOM0i/skWcxT VQUizXrGJINiF/TWlSqsCDp4suaY/8nhi6ituvKhaQVyEpodws1yU89gowbVp+575MsC 1eEw== MIME-Version: 1.0 Received: by 10.180.81.166 with SMTP id b6mr3688917wiy.0.1335729522853; Sun, 29 Apr 2012 12:58:42 -0700 (PDT) Received: by 10.180.19.193 with HTTP; Sun, 29 Apr 2012 12:58:42 -0700 (PDT) In-Reply-To: <6AF9FA27D80A49C4BC95967CB103D19D@AGB> References: <6AF9FA27D80A49C4BC95967CB103D19D@AGB> Date: Sun, 29 Apr 2012 20:58:42 +0100 Message-ID: From: Roger Lapthorn To: rsgb_lf_group@blacksheep.org X-Spam-Score: 1.8 (+) 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: Graham, When I get a new PC (next few months) with a bit more processing power I may give this a try using earth mode at VLF in the Cambridgeshire area. My initial Opera tests a few months ago led to all sorts of problems on my 6 year old WinXP PC. Since then I've not reloaded the software. You may remember that the load with Opera was close to 100% and I had a number of other issues that coincided with putting Opera software onto the PC. I hope you can assure me regarding the stability and processor loading with the latest versions. I'm still unhappy that the software is not "open" in the sense that people who know can fully understand what it does. [...] Content analysis details: (1.8 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [74.125.82.171 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (rogerlapthorn[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 2.4 HTML_OBFUSCATE_20_30 BODY: Message is 20% to 30% HTML obfuscation 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 852e9a9ee930056348c0102e6df31911 Subject: LF: =?windows-1252?Q?Re=3A_LF=3A_WANTED_8KHz_OP4H_OPERA_TESTER=92S?= Content-Type: multipart/alternative; boundary=f46d0442811eb9c75a04bed6c308 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.3 required=5.0 tests=HTML_50_60, HTML_FONTCOLOR_UNSAFE,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 x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:481854080:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-d001.1 ; domain : gmail.com DKIM : fail x-aol-sid: 3039ac1d40d94f9d9dae4678 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none --f46d0442811eb9c75a04bed6c308 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Graham, When I get a new PC (next few months) with a bit more processing power I may give this a try using earth mode at VLF in the Cambridgeshire area. My initial Opera tests a few months ago led to all sorts of problems on my 6 year old WinXP PC. Since then I've not reloaded the software. You may remember that the load with Opera was close to 100% and I had a number of other issues that coincided with putting Opera software onto the PC. I hope you can assure me regarding the stability and processor loading with the latest versions. I'm still unhappy that the software is not "open" in the sense that people who know can fully understand what it does. 73s Roger G3XBM On 29 April 2012 20:23, Graham wrote: > ** > > *WANTED 8KHz OP4H OPERA TESTER=92S * > > ** > > *Dreaming of sending data ?* > > ** > > After testing , the Dreamer=92s Band 8KHz version of the Opera > Beacon system is ready for **AIR** testing (OR) GROUND testing. > The Opera beacon tx time has been extended to 4 hours to give > maximum sensitivity , while maintaining transmit times in keeping wit= h > the 8K activity at the moment > > ** ** > > At approximately 50 % duty cycle , the system will transmit 2 hour= s > of carrier in every 4, so should reduce the electricity bill !, whil= e > sending the full call sign , as in the LF>HF versions , the decode > criteria remains at approx randomly 50% of the data during the Tx > time required to achieve a decode. > > ** ** > > Decode sensitivity is estimated to be approx -47 dB , but this is > based on the sim-path calibration and may extend lower in actual use. > > ** ** > > *In tests , a signal , modulated by the Opera on/off keying , level > reduced to 'normal off air' was demonstrated to leave a trace on = =91Spec > Lab=92 so station=92s using Opera will also show as per normal o= n > the web based grabbers etc, with the additional possibility of Opera > decodes.* > > ** ** > > As in the LF>HF versions , Opera utilises the PC sound card for > both Tx and Rx and requires NO high stability oscillators or time = synchronisation > , all testing being conducted with normal soundcards, mostly with > local Tx and Rx using very small Ae=92s over short MK1 back garde= n > test ranges. > > ** ** > > Users operating at 8Khz will show on the psk-reporting map as band > =91unknown=92, both Tx and Rx stations are included in the display= to > ensure maximum visability. > > ** ** > > *Transmit Keying * > > ** ** > > Tx keying is provided by way of a direct audio drive from the > sound card or by way of on/off keying by the com-port ptt key > output from the software. An additional com port may be addressed to > perform station Tx/Rx functions at change over. Due to the longer time > scales, the switching times of heaver 'power' relays will not > affect system performance, simplifying switching if need be. > > ** ** > > *Rx requirements * > > ** ** > > Receive is facilitated by the direct input to the sound card at the = 8Khz > operating frequency , no filtering or pre processing is required, > however, the receiver is of fixed bandwidth so if using external > oscillator , its important to ensure the signal falls within the > bass band. > > ** ** > > *Compatibility ,* > > ** ** > > Opera is designed to operate with all =91new=92 versions of windo= w=92s > and is compatible with running multiple sessions of Spec-Lab and = Opera > on the same PC > > ** ** > > *Function * > > ** ** > > The OP4H system , will provide the same data as the high frequency = variants > , s/n reporting via the web or local s/n copy if not web linked. > The full call sign is transmitted , so the system may be classed > as a data mode . > > > > > > If there are any questions etc ,pls contact myself Graham G0NBD > or Gary G4WGT , > > > > > > > > > > > > **** > --=20 http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk https://sites.google.com/site/sub9khz/ http://qss2.blogspot.com/ --f46d0442811eb9c75a04bed6c308 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Graham,

When I get a new PC (next few months) with a bit more proces= sing power I may give this a try using earth mode at VLF in the Cambridgesh= ire area.

My initial Opera tests a few months ago led to all sorts = of problems on my 6 year old WinXP PC. Since then I've not reloaded the= software. You may remember that the load with Opera was close to 100% and = I had a number of other issues that coincided with putting Opera software o= nto the PC. I hope you can assure me regarding the stability and processor = loading with the latest versions. I'm still unhappy that the software i= s not "open" in the sense that people who know can fully understa= nd what it does.

73s
Roger G3XBM



On 29 Apri= l 2012 20:23, Graham <g8fzk@g8fzk.fsnet.co.uk> wrote:<= br>

WANTED=A0=20 8KHz=A0=A0=A0=A0OP4H=A0=A0 OPERA=A0= =A0 TESTER=92S=20

=A0

Dreaming of=A0 sending=A0 data=20 ?

=A0

After=A0 testing=A0 = , the=A0 Dreamer=92s Band=A0 8KHz=A0=A0 version=A0 of=A0=20 the=A0 Opera=A0 Beacon=A0 sys= tem is ready=A0 for=A0 AIR=A0 testing=A0 (OR)=A0 GROUND=A0 testing.= =A0 The=A0 Opera beacon=A0=A0 tx=A0 = time=A0 has been=A0 extended=A0 to=A0=20 4=A0 hours=A0 to give maximum=A0 sensitivity , while=A0 maintaining transmit=A0 times in keeping=A0 with=A0 the=A0 8K activity=A0 at the=A0 moment

=A0

At=A0=20 approximately=A0 50 % duty=20 cycle , the=A0 system=A0 will=A0 tra= nsmit=A0 2=A0=20 hours=A0 of=A0 carrier=A0 in = every 4, so=A0 should=A0 reduce the electricity=A0 bill !, while=A0 sending the=A0 fu= ll=A0 call=A0 sign , as in the=A0 LF= >HF=A0 versions=A0 , the=A0 decod= e=A0 criteria remains=A0 at=A0=20 approx=A0 randomly 50% of=20 the=A0 data=A0 during=A0 the= =A0 Tx time required to achieve=A0 a decode.

=A0

Decode sensitivity is=A0 estimate= d=A0 to=A0=20 be=A0=A0 approx=A0 -47 dB , but=A0 <= /span>this=A0 is based on the=A0 sim-path calibra= tion and=A0 may extend lower in=A0 actual= =A0 use.

=A0

In tests ,=A0a=20 signal , modulated=A0 by=20 the=A0 Opera=A0 on/off=A0 keying=A0, level reduced to 'normal off=A0 air'=20 was=A0 demonstrated to=A0 leave a=A0= trace=A0 on=A0=20 =91Spec Lab=92=A0 so=A0 station=92s= =A0 using=A0 Opera will=A0 also=A0 <= /span>show=A0 as=A0=20 per normal=A0 on=A0 the=A0 we= b based grabbers=A0 etc, with the=A0 additional p= ossibility=A0 of Opera=20 decodes.

=A0

As in the=A0=20 LF>HF=A0 versions ,=20 Opera=A0 utilises=A0 the PC sound=A0 card=A0 for=A0 both=A0 Tx=A0= =20 and=A0 Rx=A0 and requires=A0 = NO high stability=A0 oscillators=A0 or time= =A0 synchronisation =A0, all=A0 testing=A0 being conducted with=A0 normal=A0 s= oundcards, mostly=A0 with=A0 local=A0 Tx and Rx using=A0 very=A0 small=A0 Ae=92s=A0 over=A0 short=A0 MK1 bac= k=A0 garden=A0 test=A0 ranges.

=A0

Users operating at 8Khz=A0=A0 wil= l show on the=20 psk-reporting=A0=A0 map as band=20 =91unknown=92, both=A0 Tx=A0 and=A0 = Rx=A0=20 stations=A0 are included=A0 in the= =A0 display to=A0 ensure=A0 maximum= =A0 visability.

=A0

Transmit=A0=20 Keying

=A0

Tx=A0=20 keying=A0 is=A0 provided by way=A0 <= /span>of=A0=20 a=A0 direct=A0 audio=A0 drive= =A0 from the=A0 sound=A0 card= =A0 or=A0=20 by way of=A0 on/off keying=A0=A0 by the=A0com-port=A0 ptt=A0=A0 key=A0 output=A0 from the=A0 software. An additional com port may be=20 addressed to perform station Tx/Rx functions at change over. Due to the=20 longer=A0 time=A0 scales, the=A0 switching=A0 times of=A0 heaver=20 'power' relays=A0 will=A0 not=A0 affect=A0system performance,=20 simplifying=A0 switching=A0 if need=A0 be.=A0

=A0

Rx requirements

=A0

Receive is=A0=20 facilitated by the=A0=20 direct=A0 input to the=A0 sound card= =A0 at the=A0 8Khz operating=A0 frequency = , no=A0 filtering=A0 or=A0=20 pre processing=A0 is=A0 required, however,= the=A0=20 receiver=A0 =A0is=A0 of fixed bandwidth=A0 so=A0 if=A0 using=20 external=A0 oscillator , its=A0 important to=A0 ensure=A0 the=A0=20 signal=A0 falls within=A0 the=A0 bass band.

=A0

Compatibility ,

=A0

Opera=A0=20 is=A0 designed to=A0 operate=A0 with=A0 all =91new=92=A0 versions=A0 of=A0=20 window=92s=A0 and=A0 is=A0=20 compatible=A0 with=A0 running=A0 multiple=A0 sessions=A0 of Spec-Lab=A0 = and=A0 Opera on the=A0 same PC

=A0

Function

=A0

The OP4H system , will=A0 provide= the=A0 same=A0 data=A0 as the= =A0 high=A0 frequency=A0 variants , s/n=A0 reporting=A0 via the=A0 web or=A0 local=A0 s/n=A0 copy=A0 = if not=A0 web=A0 linked. The=A0 full= =A0 call sign=A0 is=A0=20 transmitted , so=A0 the=A0 system=A0= may be=A0 classed as=A0 a data=A0 <= /span>mode .

=A0

=A0

If there=A0 are=A0 any=A0 questions etc =A0=20 ,pls contact=A0 myself=A0 Graham G0NBD or=A0=A0 Gary G4WGT ,=20

=A0

=A0

=A0

=A0

=A0

=A0




--
http://g3xbm-qrp.blogspot.com/
http://ww= w.g3xbm.co.uk
https:= //sites.google.com/site/sub9khz/
http://qss2.blogspot.co= m/

--f46d0442811eb9c75a04bed6c308--