Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mc04.r1000.mx.aol.com (Internet Inbound) with ESMTP id 59B0D3800009C; Mon, 30 Apr 2012 13:29:49 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1SOuOb-0003fs-0X for rs_out_1@blacksheep.org; Mon, 30 Apr 2012 18:28:21 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1SOuOZ-0003fj-Vp for rsgb_lf_group@blacksheep.org; Mon, 30 Apr 2012 18:28:19 +0100 Received: from mail-wg0-f47.google.com ([74.125.82.47]) by relay1.thorcom.net with esmtps (TLSv1:RC4-SHA:128) (Exim 4.77) (envelope-from ) id 1SOuOW-0005Ms-6b for rsgb_lf_group@blacksheep.org; Mon, 30 Apr 2012 18:28:18 +0100 Received: by wgbfa7 with SMTP id fa7so2337540wgb.28 for ; Mon, 30 Apr 2012 10:28:13 -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=subject:references:from:content-type:x-mailer:in-reply-to :message-id:date:to:content-transfer-encoding:mime-version; bh=SFuI7HVzKdZw0o4XXJf7KgYg085z+LbiVQUuYmdr4/k=; b=jzmHF5MT3jUQLSfQ5Td+HWnKNTPoy0qorQdCEdiPIcurk/ScJ/yDFPov43apOtALPZ m7H/7sGGTCNuynK2MZTjlU+nwsF8Lrb0bCJ2awbfuoqrSAZVbkP2n3CDhQ3VN+Wext/g jeFq4PChE4RtpuYBYOpzGeYftnzoxLJ+rGEDARPI3xj+croLrwO16wTZqExLPpJRBn+5 9Kn0nW6M08J7Jkv8If6fCk5cDHC+D7FOQb/D/AlwsAD+8Lc64r5flhoheWqmdTSdZ8eH AXvsCgc9ca8VHLp3zZLyjs9IWl49EXyB/DsYTMklyOcWgc8knQ0lZUe99c7EFrz8RW+c j/FQ== Received: by 10.216.132.40 with SMTP id n40mr13209808wei.68.1335806893584; Mon, 30 Apr 2012 10:28:13 -0700 (PDT) Received: from [192.168.0.2] (cpc5-cmbg17-2-0-cust790.5-4.cable.virginmedia.com. [86.30.115.23]) by mx.google.com with ESMTPS id 6sm29693660wiz.1.2012.04.30.10.28.10 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 30 Apr 2012 10:28:11 -0700 (PDT) References: <6AF9FA27D80A49C4BC95967CB103D19D@AGB> <4C97DD0B42C646C2949D0F40A20238BD@AGB> From: Roger Lapthorn X-Mailer: iPod Mail (9B176) In-Reply-To: <4C97DD0B42C646C2949D0F40A20238BD@AGB> Message-Id: <92F0BC73-7E10-4178-95C6-C15621415373@gmail.com> Date: Mon, 30 Apr 2012 18:28:07 +0100 To: "rsgb_lf_group@blacksheep.org" Mime-Version: 1.0 (1.0) X-Spam-Score: -0.7 (/) 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: Ok Graham and thanks for the information. The PC loading looks fine then. As soon as I get my new PC I'll give OPERA a go on both 500kHz and 137kHz. During the summer I intend to improve my LF/MF antennas and I look forward to some exciting tests later in the year. [...] Content analysis details: (-0.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [74.125.82.47 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 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 MIME_QP_LONG_LINE RAW: Quoted-printable line longer than 76 chars 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 0ddee60f61a179b8c214e0e52528af08 Subject: =?utf-8?Q?Re:_LF:_Re:_LF:_WANTED_8KHz_OP4H_OPERA_TESTER=E2=80=99?= =?utf-8?Q?S?= Content-Type: multipart/alternative; boundary=Apple-Mail-0539FFCF-8034-49C3-980C-456581CA83D9 Content-Transfer-Encoding: 7bit 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,TO_ADDRESS_EQ_REAL 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: 0:2:510087584:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-m216.2 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d604c4f9ecc0d025b X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none --Apple-Mail-0539FFCF-8034-49C3-980C-456581CA83D9 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Ok Graham and thanks for the information. The PC loading looks fine then.=20= As soon as I get my new PC I'll give OPERA a go on both 500kHz and 137kHz. D= uring the summer I intend to improve my LF/MF antennas and I look forward to= some exciting tests later in the year.=20 At the moment I am concentrating on 10/6m and optical NLOS tests. There is s= o much to enjoy in our fascinating hobby.=20 73s Roger G3XBM -- Via my 2.4GHz transceiver -- On 29 Apr 2012, at 22:19, "Graham" wrote: > Ok Roger > =20 > CPU loading , my old intel P4 3.8g shows between 25 and 35 % l= oading , I think compared to the beta-beta version the load is much red= uced, waterfall can be switched off , that also helps , Rx is single = mode now as well , which has reduced the loading and the false de= codes. On this intel I4 2.8 , I see 0% or 1 or 2 % maximum cpu load= ing.=20 > =20 > If you check the psk-map , all bands you can see there is quite a l= arge user base , we have not had any stability problems reported via= the yahoo group, with over 500 members now , so I think all is ok , = a run down of the digital encoding is available on the yahoo-group . R= x and Tx stations are announced via the psk -map=20 > =20 > Gary and Eddie have spent quite a few hours testing the decode and= at the moment , all looks to be ok , Gary also used two soundcards an= d that test was ok as well ..hopefully some one will get a off air= decode past the garden fence hi > =20 > 73 -G.=20 >=20 > From: Roger Lapthorn > Sent: Sunday, April 29, 2012 8:58 PM > To: rsgb_lf_group@blacksheep.org > Subject: LF: Re: LF: WANTED 8KHz OP4H OPERA TESTER=E2=80=99S >=20 > Graham, >=20 > When I get a new PC (next few months) with a bit more processing power I m= ay give this a try using earth mode at VLF in the Cambridgeshire area.=20 >=20 > 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 rem= ember 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 c= an assure me regarding the stability and processor loading with the latest v= ersions. I'm still unhappy that the software is not "open" in the sense that= people who know can fully understand what it does.=20 >=20 > 73s > Roger G3XBM >=20 >=20 >=20 > On 29 April 2012 20:23, Graham wrote: > WANTED 8KHz OP4H OPERA TESTER=E2=80=99S > =20 > Dreaming of sending data ? > =20 > After testing , the Dreamer=E2=80=99s Band 8KHz version of the Op= era 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 with the 8K= activity at the moment > =20 > At approximately 50 % duty cycle , the system will transmit 2 hours= of carrier in every 4, so should reduce the electricity bill !, while= 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 ti= me required to achieve a decode. > =20 > Decode sensitivity is estimated to be approx -47 dB , but this is b= ased on the sim-path calibration and may extend lower in actual use. > =20 > In tests , a signal , modulated by the Opera on/off keying , level red= uced to 'normal off air' was demonstrated to leave a trace on =E2=80= =98Spec Lab=E2=80=99 so station=E2=80=99s using Opera will also show a= s per normal on the web based grabbers etc, with the additional possib= ility of Opera decodes. > =20 > As in the LF>HF versions , Opera utilises the PC sound card for bot= h Tx and Rx and requires NO high stability oscillators or time synch= ronisation , all testing being conducted with normal soundcards, mostly= with local Tx and Rx using very small Ae=E2=80=99s over short MK1 b= ack garden test ranges. > =20 > Users operating at 8Khz will show on the psk-reporting map as band =E2= =80=98unknown=E2=80=99, both Tx and Rx stations are included in the d= isplay to ensure maximum visability. > =20 > Transmit Keying > =20 > Tx keying is provided by way of a direct audio drive from the so= und 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 sta= tion Tx/Rx functions at change over. Due to the longer time scales, the= switching times of heaver 'power' relays will not affect system perfo= rmance, simplifying switching if need be.=20 > =20 > Rx requirements > =20 > Receive is facilitated by the direct input to the sound card at the 8= Khz operating frequency , no filtering or pre processing is require= d, however, the receiver is of fixed bandwidth so if using external o= scillator , its important to ensure the signal falls within the bass b= and. > =20 > Compatibility , > =20 > Opera is designed to operate with all =E2=80=98new=E2=80=99 versions= of window=E2=80=99s and is compatible with running multiple sessio= ns of Spec-Lab and Opera on the same PC > =20 > Function > =20 > The OP4H system , will provide the same data as the high frequency v= ariants , s/n reporting via the web or local s/n copy if not web li= nked. The full call sign is transmitted , so the system may be class= ed as a data mode . > =20 > =20 > If there are any questions etc ,pls contact myself Graham G0NBD or = Gary G4WGT , > =20 > =20 > =20 > =20 > =20 > =20 >=20 >=20 >=20 > --=20 > http://g3xbm-qrp.blogspot.com/ > http://www.g3xbm.co.uk > https://sites.google.com/site/sub9khz/ > http://qss2.blogspot.com/ >=20 --Apple-Mail-0539FFCF-8034-49C3-980C-456581CA83D9 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8
Ok Graham and thanks for t= he information.  The PC loading looks fine then. 
<= span class=3D"Apple-style-span" style=3D"-webkit-tap-highlight-color: rgba(2= 6, 26, 26, 0.292969); -webkit-composition-fill-color: rgba(175, 192, 227, 0.= 230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); ">
As soon as I get my new PC I'll give OPERA a go on both 5= 00kHz and 137kHz. During the summer I intend to improve my LF/MF antennas an= d I look forward to some exciting tests later in the year. 

At the moment I am concentrating on 10/6m and optical N= LOS tests. There is so much to enjoy in our fascinating hobby. 

73s
Roger G3XBM

-- Via my 2.4GHz transcei= ver --

On 29 Apr 2012, at 22:19, "Graham" <g8fzk@g8fzk.fsnet.co.uk> wrote:

Ok Roger
 
CPU loading  , my  old  intel  P4 =20 3.8g   shows   between  25  and  35 %&nbs= p;=20 loading , I think  compared to the  beta-beta   version=20= the  load is much reduced,  waterfall  can be  switched=20= off  , that  also  helps , Rx is  single  mode = ;=20 now  as  well  , which has  reduced the  loading&nb= sp;=20 and  the  false  decodes. On this  intel  I4 =20= 2.8  , I see  0% or  1  or 2 % maximum  cpu =20= loading. 
 
If you  check the  psk-map  , all  bands you  c= an=20 see  there is quite  a large user base , we  have  not&n= bsp;=20 had  any  stability  problems  reported  via the&nb= sp;=20 yahoo  group, with  over  500  members now , so  I=20= think  all is ok ,  a run  down of the  digital =20= encoding  is  available on the  yahoo-group . Rx and Tx = =20 stations  are  announced  via the  psk -map 
=
 
Gary and Eddie  have  spent  quite  a few =20 hours  testing  the  decode and at the  moment , all&nbs= p;=20 looks to  be ok , Gary also  used  two  soundcards and&n= bsp;=20 that  test was  ok as  well ..hopefully  some  one=20= will  get  a off  air  decode past the =20= garden  fence  hi
 
73 -G. 

Sent: Sunday, April 29, 2012 8:58 PM
Subject: LF: Re: LF: WANTED 8KHz OP4H OPERA=20 TESTER=E2=80=99S

Graham,

When I get a new PC (next few months) with a b= it=20 more processing power I may give this a try using earth mode at VLF in the=20= Cambridgeshire area.

My initial Opera tests a few months ago led to a= ll=20 sorts of problems on my 6 year old WinXP PC. Since then I've not reloaded th= e=20 software. You may remember that the load with Opera was close to 100% and I h= ad=20 a number of other issues that coincided with putting Opera software onto the= PC.=20 I hope you can assure me regarding the stability and processor loading with t= he=20 latest versions. I'm still unhappy that the software is not "open" in the se= nse=20 that people who know can fully understand what it does.

73s
Roger= =20 G3XBM



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

WANTED =20 8KHz    OP4H  =20 OPERA   TESTER=E2=80=99S <= /b>

 

Dreaming of  sending  data=20= ?

 

After =20 testing  , the  Dreamer=E2=80=99= s=20 Band  8KHz   version =20= of  the  Opera =20 Beacon  system is ready =20 for  AIR =20 testing  (OR)  GROUND&nbs= p;=20 testing.  The  Opera=20 beacon   tx  time =20 has been  extended  to&nb= sp;=20 4  hours  to give=20 maximum  sensitivity , while  maintain= ing=20 transmit  times in keeping =20 with  the  8K activity&nb= sp;=20 at the  moment

=  

= At  approximately&nbs= p;=20 50 % duty cycle , the  system =20 will  transmit  2 =20= hours  of  carrier =20= in every 4, so  should  reduce t= he=20 electricity  bill !, while  sending=20= the  full  call  sig= n ,=20 as in the  LF>HF  versions&nb= sp;=20 , the  decode  criteria=20 remains  at  approx =20 randomly 50% of the  data =20 during  the  Tx time required t= o=20 achieve  a decode.

=  

= Decode sensitivity is =20 estimated  to  be &n= bsp;=20 approx  -47 dB , but =20 this  is based on the  sim-path= =20 calibration and  may extend lower in =20 actual  use.

=  

= In tests , a signal ,=20= modulated  by the  Opera =20= on/off  keying , level reduced to 'nor= mal=20 off  air' was  demonstrated to =20= leave a  trace  on =20= =E2=80=98Spec Lab=E2=80=99  so =20 station=E2=80=99s  using  Opera= =20 will  also  show =20 as  per normal  on =20= the  web based grabbers  etc, w= ith=20 the  additional possibility  of Opera=20= decodes.

=  

= As in the  LF>HF&n= bsp;=20 versions , Opera  utilises  the= PC=20 sound  card  for =20 both  Tx  and =20 Rx  and requires  NO high=20 stability  oscillators  or=20 time  synchronisation  , all&nbs= p;=20 testing  being conducted with =20 normal  soundcards, mostly =20 with  local  Tx and Rx=20 using  very  small =20 Ae=E2=80=99s  over  short=  =20 MK1 back  garden  test&nb= sp;=20 ranges.

=  

= Users operating at 8Khz   will=20 show on the psk-reporting   map as band =E2=80=98un= known=E2=80=99,=20 both  Tx  and =20 Rx  stations  are=20 included  in the  display to&nbs= p;=20 ensure  maximum =20 visability.

=  

Transmit  Keying=20

=  

= Tx  keying =20 is  provided by way  of&n= bsp;=20 a  direct  audio =20= drive  from the  sound&nb= sp;=20 card  or  by way of  on/of= f=20 keying   by the com-port =20 ptt   key  output&nb= sp;=20 from the  software. An additional com port may be= =20 addressed to perform station Tx/Rx functions at change over. Due to the=20= longer  time  scales, the  switching  times of =20= heaver 'power' relays  will  not  affect system=20 performance, simplifying  switching  if need  be. =20

=  

Rx requirements=20

=  

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

=  

Compatibility ,

=  

= Opera  is  designed=20 to  operate  with  a= ll=20 =E2=80=98new=E2=80=99  versions  of =20 window=E2=80=99s  and  is=  =20 compatible  with =20 running  multiple =20 sessions  of Spec-Lab =20 and  Opera on the  same PC=20

=  

Function

=  

= The OP4H system , will  pro= vide=20 the  same  data  as=20= the  high  frequency =20 variants , s/n  reporting  via=20= the  web or  local =20 s/n  copy  if not =20= web  linked. The  full&nb= sp;=20 call sign  is  transmitted ,=20= so  the  system  may= =20 be  classed as  a data =20 mode .

=  

=  

= If there  are  any  questions e= tc  =20 ,pls contact  myself  Graham G0NBD or   Gary G4WGT ,=20= <= /span>

=  

=  

=  

=  

=  

=  

<= /div>



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

= --Apple-Mail-0539FFCF-8034-49C3-980C-456581CA83D9--