Return-Path: Received: from mtain-mk11.r1000.mx.aol.com (mtain-mk11.r1000.mx.aol.com [172.29.97.143]) by air-da03.mail.aol.com (v129.4) with ESMTP id MAILINDA032-86134d553cf11ac; Fri, 11 Feb 2011 08:43:13 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mk11.r1000.mx.aol.com (Internet Inbound) with ESMTP id 19F74380000A4; Fri, 11 Feb 2011 08:43:10 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PntFy-0007n6-Fq for rs_out_1@blacksheep.org; Fri, 11 Feb 2011 13:41:54 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PntFx-0007mx-UK for rsgb_lf_group@blacksheep.org; Fri, 11 Feb 2011 13:41:53 +0000 Received: from smtp5.freeserve.com ([193.252.22.159]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PntFv-0000PK-5H for rsgb_lf_group@blacksheep.org; Fri, 11 Feb 2011 13:41:53 +0000 Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf3413.me.freeserve.com (SMTP Server) with ESMTP id 6D9B61C00088 for ; Fri, 11 Feb 2011 14:41:45 +0100 (CET) Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf3413.me.freeserve.com (SMTP Server) with ESMTP id 58AE81C00092 for ; Fri, 11 Feb 2011 14:41:45 +0100 (CET) Received: from AGB (unknown [91.110.95.134]) by mwinf3413.me.freeserve.com (SMTP Server) with SMTP id EDF3A1C00088 for ; Fri, 11 Feb 2011 14:41:44 +0100 (CET) X-ME-UUID: 20110211134144974.EDF3A1C00088@mwinf3413.me.freeserve.com Message-ID: <37102AA68760480797E2EB731131BF7F@AGB> From: "Graham" To: Date: Fri, 11 Feb 2011 13:41:44 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 X-Antivirus: avast! (VPS 110210-0, 10/02/2011), Outbound message X-Antivirus-Status: Clean X-Spam-Score: 1.8 (+) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,TVD_SUBJ_ACC_NUM=1.8 Subject: LF: Link to ROS VLF 8KHz 0.4 baud Data mode download Content-Type: multipart/alternative; boundary="----=_NextPart_000_0066_01CBC9F1.6BA15E70" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.2 required=5.0 tests=HTML_60_70,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 x-aol-global-disposition: G x-aol-sid: 3039ac1d618f4d553cee3f02 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none ------=_NextPart_000_0066_01CBC9F1.6BA15E70 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Link to ROS VLF 8KHz Data mode download=20 This may be of interest to anyone testing in the audio spectrum,= operation is the same as the HF an MF modes , giving live rtty= facility , beacon , automated e-mail reports, auto report upload to= the psk-reporting system and direct indication of RX S/N , will= run on 'NET Book' pc so may be taken portable ,or used as web= linked remote monitoring requiring only the soundcard for tx & rx= ... (previous versions are now time expired) This version of the ROS MF data mode is coded to allow the dire= ct use of a sound card for -on frequency- transmission and recept= ion on the 8Khz band ,=20 =20 As the mode is coded with a TX and RX centre frequency of 8962.5= Hz , the PC becomes a software defined stand alone 'radio' =20 To accommodate the use of class e/d amplifiers with 'divide= by 2' function in the drive chain, the tx toned may be switched= to 16 Khz with X2 deviation , which after amplification, reverts= to the 8 K parameters =20 Notably this is a live data mode (as all ros modes) so there = is no requirement for accurate PC time setting and offers a = wide 'AFC' range of 78 Hz negating the need for high initial= frequency stability or 'net' the system is tolerant of upto 5= Hz drift after initial lock=20 =20 Notes for its installation / use are posted along with the zip exe fil= e,=20 =20 Note - you will need to have the normal HF/MF version installe= d and working , before the vlf exe will run =20 =20 Obviously Ros-vlf cannot bend the laws of physics and is a live= keyboard data mode with 0.4 baud rate , so signal levels wil= l need to be higher than those required for slow time base 'tra= ce' observations , however from initial tests , it is functioning= well below audible levels .. Its advisable to observe the mode= working at HF at the higher baud rates to gain a overview of its= operation. =20 https://sites.google.com/site/uk500khz/ros-vlf---exe =20 =20 Data summery=20 =20 Frequency tx/rx 8950-8975 Hz =20 Bandwidth 25 Hz=20 Baud rate fixed 0.4 / (0.8 not posted) Rx AFC range 78 Hz=20 Drift tolerance 5 Hz=20 S/N 0.4 Baud -38 dB=20 73 - G ..G0NBD =20 ------=_NextPart_000_0066_01CBC9F1.6BA15E70 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Link to  ROS VLF  8KHz = ; Data =20 mode  download
 
This may be of  interest = to  anyone=20 testing  in the  audio  spectrum, operation  is th= e =20 same as the  HF an MF modes  , giving  live rtty = facility ,=20 beacon , automated e-mail  reports, auto report upload to the psk= -reporting=20 system  and  direct  indication  of  RX S/N&n= bsp; ,=20 will  run on  'NET Book' pc  so  may be  take= n =20 portable ,or  used as web linked remote monitoring  requirin= g =20 only the  soundcard for  tx & rx ...
 
(previous  versions  are no= w =20 time  expired)
 
 This= version of=20 the  ROS MF data  mode  is coded to  allow  the  direct use of a  = sound card  for  -on frequency-  transmission and  reception  on the&n= bsp; 8Khz band ,

 

= As the  mode is  coded  with a  of &nbs= p;8962.5  Hz ,= the  PC becomes  a software  defined  stand alone =91radio=92

 

= To  accommodate  the =20 use  of  class  e/d = amplifiers  wi= th  =91divide by 2=92= function  in the  drive chain, the tx toned=   may be  switched to   16 Khz with   X2 deviation , which after  amplification, reverts to  the  8 K&nbs= p; parameters

 

= Notably=20 this  is a  live data  mode&nbs= p; (as all  ros= modes)  so =20 there  is no  requirement for  accurate  PC = =20 time setting  and=   offers  a  range of = 78 Hz negating  the  need  for  high = initial  frequ= ency  stability or =91= net=92  the  system  is tolerant  5 Hz drift  after  initial  lock

 

= Notes for its=20 installation / use are posted along with the zip exe file,

 

= Note -  you  will  need = to =20 have the  normal= HF/MF  version  installed  and working  , before the  vlf  = exe  will  run   <= /SPAN>

 

= Obviously  Ros-vlf  cannot bend the  laws  of physics and is a  live&nbs= p; keyboard  da= ta  mode  with  0.4  baud  rate , so  signal  levels will  need = to =20 be  higher than  those required for  slow time base  =91trace=92  observations  , however from initial  tests , it is  functioning well  audible  levels ..  Its  advisable to  observe the&= nbsp; mode working at HF at the  higher = baud rates to  gain a overview of its  operation.

 

https://sites.google.com/site/uk500khz/ros-vlf---exe

 

 

Data  summery

 

= Frequency  tx/rx      &nbs= p;   =20 8950-8975  Hz  &nb= sp;        =20

= Bandwidth     &= nbsp;           = ;  =20 25 Hz

= Baud rate    &n= bsp;           =     =20 fixed  0.4   /  (0.8 not posted)

= Rx=20 AFC range &= nbsp;           = ;=20 78 Hz

= Drift=20 tolerance    &n= bsp;         =20 5 Hz

= S/N  0.4  Baud          &nbs= p; =20 -38 dB

 

=  

= 73 - G ..G0NBD

 



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