Re: LF: New version OPERA >> ''Opera Dynamic'' <<

["Graham" <g8fzk@g8fzk.fsnet.co.uk>]

Some points Mike

200%F  is  a  bodge to get the  text  beacon via   the  server , not
showing  in my  latest  spot listing ?

JA8SCD de SWL-JA8SCD/1 (): Op32 0 mi -41 dB in Tokyo with 0w +
16:29    136 JA8SCD de JA8SCD/1 Op32 Deep Search 0 mi -41 dB in Tokyo with
0w +

4 Min processing  delay  showing  in these  detection's

16:15    136 LA3EQ de G4WGT Op32 Deep Search 468 mi -43 dB in Chorley,
IO83qo, with 0.2w + Marconi-T
16:11    136 LA3EQ de G8HUH Op32 605 mi -34 dB F:15% in Somerset with 0.2w +
Marconi-T

17:23    136 LA3EQ de GW0EZY Op32 Deep Search 541 mi -42 dB in Welshpool 
IO82ho with 0.2w + Marconi-T
17:23    136 LA3EQ de 2E0ILY Op32 Deep Search 505 mi -42 dB in Shropshire 
IO82qv with 0.2w + Marconi-T
17:19    136 LA3EQ de G8HUH Op32 605 mi -33 dB F:1% in Somerset with 0.2w + 
Marconi-T

> > Nothing  can be  100% ,   Dynamic   detections ,  will  show   1
> > minuet after  conventional OP8   and   4  minuets   after  a
> > conventional  OP32  decode , this  is due  to  data  processing  time
> > and  is a  fixed  off  set  , Time can be  used  as  a reality  check

There  are now  two  entirely  different  systems  packaged  in the  one
application ,  the  original Opera  data  mode , which is   capable  of
presenting  the  fade pattern  and  the  s/n ,  the  other  relies  on  call
matching  and  presents  s/n only  , hence  the  'odd' 200%F  , the  dynamic
search has been trailed  on  normal  'ham' kit and  provides an extension to
the  existing  system .

Before  any  variations  are  attempted ,  off  air  stats  are needed ,
there  was  close  to  100  instances  of  V155  in use  since  its  launch
,  with  only  1 error  that  would be   1% . Occurrences  will  be
statistically  related to  user  numbers

Where  it  is  unfortunate   'real'  calls  are  produced  , the  time
delay  presents a  simple , at a glance spot-check , the integrity of the
original  system has not  been  compromised, at the  moment  the list
has a  8 day  life , this  could be  reduced , but  with the  7 day 
operating
cycle ,  8  provides overlap

73-G,



--------------------------------------------------
From: "Mike Dennison" <mike.dennison@ntlworld.com>
Sent: Wednesday, January 07, 2015 3:37 PM
To: <rsgb_lf_group@blacksheep.org>
Subject: Re: LF: New version  OPERA  >>  ''Opera Dynamic'' <<

> Sorry, Graham, but you are wrong. Last night's results did not "give
> a good working compromise between real and false detections." There
> were several very plausible but false decodes. These appeared much
> more frequently than they do on OPDS which in any case gives enough
> additional information on signal quality to be able to spot most
> false decodes. It's a nice idea, but the real/false threshold is set
> much too far towards 'real', making the resultant information next to
> useless.
>
> And what is the "200%" fade figure all about? I am 1000% sure I don't
> know.
>
> Mike, G3XDV
> ==========
>
> > All,
> >
> > Other  than  the  odd  false  spot , that looked to  be  quite  a
> > good  launch  for the  new  addition  to  Opera
> >
> > Nothing  can be  100% ,   Dynamic   detections ,  will  show   1
> > minuet after  conventional OP8   and   4  minuets   after  a
> > conventional  OP32  decode , this  is due  to  data  processing  time
> > and  is a  fixed  off  set  , Time can be  used  as  a reality  check
> > .
> >
> > Dynamic  compares   Call Signs  with  activity , to provide  the
> > lowest  possible  detection  levels , to  do  this  ,  Opera  changes
> > mode  to  give  a  second  chance  detection , based on  s/n , The
> > detection  threshold has been  set  to  give a good  working
> > compromise between  real and  false detections.
> >
> >  Noting , each individual transmission is  processed  independently ,
> >  Conventional  and Dynamic  processes  are    running  in parallel
> >
> > 73-Graham
> > G0NBD
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > From: Graham
> > Sent: Tuesday, January 06, 2015 8:38 PM
> > To: rsgb_lf_group@blacksheep.org
> > Subject: LF: New version OPERA >> ''Opera Dynamic'' <<
> >
> >
> > New  version  of  opera  up-loaded
> >
> > Opera Dynamic: Introduces   the  first, adaptive  multi mode  Beacon
> > decoding/detection  system , seamlessly  taking over from   the  Opera
> > data  decoder  and  dynamically configuring  the  low level  detector.
> >
> >
> >
> > Opera Dynamic  is  configured  for  MF OP8  and  LF OP32   , providing
> >  a dynamically   configured  low  level  detection  mode ,
> > complimenting  the  Opera  Data mode ,
> >
> >
> >
> > Opera Dynamic  forms  part  of  the  windows  distributed  package ,
> >
> >
> >
> > 73-Graham
> >
> > G0NBD
> >
> >
> >
> >
> >
> > UPLOAD
> >
> >
> >
> >   http://rosmodem.wordpress.com/
> >
> >
> >
> > SUPPORT
> >
> >
> >
> > https://groups.yahoo.com/neo/groups/O_P_E_R_A_/info
> >
> >
> >
> > https://www.facebook.com/groups/operadatamode/
> >
> >
> >
> > -----
> > No virus found in this message.
> > Checked by AVG - www.avg.com
> > Version: 2015.0.5577 / Virus Database: 4257/8885 - Release Date:
> > 01/07/15