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Content preview: Is that funny Ha Ha or funny Peculiar ? correlation requires a single phase continuous carrier so 4 carrier switching 1.5 hz or what ever is not a single carrier therefore wspr is not suitable for decoding by correlation [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [80.12.242.29 listed in list.dnswl.org] 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: eec106d36eb876515d296e51093c048c Subject: Re: LF: 74550 XRS in Germany Content-Type: multipart/alternative; boundary="----=_NextPart_000_019B_01CEBD61.170DF0B0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_40_50,HTML_MESSAGE, MISSING_OUTLOOK_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 Status: O X-Status: X-Keywords: X-UID: 1965 This is a multi-part message in MIME format. ------=_NextPart_000_019B_01CEBD61.170DF0B0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Is that funny Ha Ha or funny Peculiar ? correlation requires a single phase continuous carrier =20 so 4 carrier switching 1.5 hz or what ever is not a single = carrier =20 therefore wspr is not suitable for decoding by correlation=20 G,=20 =20 From: Stefan Sch=E4fer=20 Sent: Sunday, September 29, 2013 10:02 PM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: 74550 XRS in Germany Funny, i think we can continue with this discussion endlessly :-)) A running gag. Am 29.09.2013 22:45, schrieb Graham:=20 wspr uses 4 carriers , so not suitable=20 Not suitable for what? 73, Stefan Am 29.09.2013 22:45, schrieb Graham:=20 There is only 'one' Opera ! there is no other single carrier = on/off data system=20 Yes , Markus has designed a secondary detector that acts as a = pattern recognition system , for best results , the qrg needs = to be as stable as possible , wspr uses 4 carriers , so not = suitable and conventional qrss has a limited number of = transitions=20 Opera sends 256 bits in each tx cycle , which can be = detected earlier than the main decoder , that is extracting the = call from the received data as opposed to pattern matching , = 'a software bombe'=20 Using the long Op coded tx signal , now , gives a 3 way = split , the 65 min tx time produces quite a sizeable block of = data to post-process=20 1... Normal decode with Op software ------round -43 dB =20 2...qrss grabber trace as line on qrg...... ?? 3... correlation detection ....... -50 dB ??=20 With the advantage of 50% duty cycle ..=20 73-G, ------=_NextPart_000_019B_01CEBD61.170DF0B0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Is  that  funny  Ha Ha  or  funny =20 Peculiar  ?
 
correlation  requires  a  single  phase =20 continuous  carrier 
so  4  carrier  switching  1.5  hz  = or =20 what ever  is  not  a  single  carrier  =
 
therefore  wspr  is  not  suitable  = for =20 decoding  by  correlation
 
G,
 
 
 
 

From: Stefan = Sch=E4fer
Sent: Sunday, September 29, 2013 10:02 PM
Subject: Re: LF: 74550 XRS in Germany

Funny, i think we can continue with this discussion = endlessly=20 :-))
A running gag.

Am 29.09.2013 22:45, schrieb Graham:=20
wspr  uses   4 carriers  , = so =20 not suitable

Not suitable for = what?

73, Stefan



Am 29.09.2013 = 22:45, schrieb=20 Graham:=20
There is only   'one'  = Opera  !=20 there  is  no  other  single  carrier =20 on/off  data  system
 
Yes  , Markus  has  = designed =20 a  secondary detector  that  acts  as  = a =20 pattern  recognition  system , for  best  = results  ,=20 the  qrg  needs  to  be  as  stable = as =20 possible  , wspr  uses   4 carriers  , = so =20 not suitable  and  conventional  qrss   has = a =20 limited  number  of  transitions 
 
 Opera  sends  256  = bits =20 in each  tx  cycle  , which  can be  = detected =20 earlier  than the  main decoder  , that  is =20 extracting  the    call  from the  = received =20 data   as opposed  to  pattern  = matching  ,=20 'a  software  bombe'
 
Using  the  long  Op coded = tx =20 signal  , now ,   gives  a  3  way  = split ,=20 the  65 min tx  time  produces  quite a =20 sizeable  block of  data  to  post-process =
 
1... Normal   decode  = with  Op=20 software ------round  -43 dB 
2...qrss   grabber  trace  = as =20 line  on qrg...... ??
3... correlation detection  .......  = -50 dB ??=20
 
With the  advantage  of 50% duty = cycle =20 ..
 
73-G,

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