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Ok That would explain the situation
A quick fix could be to run the Op
software , which should register your
locator / call in the data base, then range
calculations should be correct ...... or simple
run the software with 'NO' radio attached ,
so the web beacons are sent and you
would receive your decodes directly ?
Yes have been watching the progress of
your correlation system , the Opera system
is designed to be used with normal
tx/rx and in place of the CW key , so technically
the designer was blindfolded and could only
used one hand !
Jose expects a s/n improvement of
6dB , that's 6 dB less , from a
change to the modulator, I think PSK is his
choice , but then as you can see ,
many stations could not then send the mode ,
Op detection is also single pass , He had
though of changing to psk, but that would
of cut most of the MF/LF station's out of
the script !
But if you can extract another 10 dB ,
then this looks good for
Stefan's VK or Bust game ! .......
and OP4 Hour , 8KHz audio , that would be
a interesting challenge , could the system
be used at 8KHz to give extended range to
the Dreamer band ?
73-Graham.
Mr GOOGLE says you make bread ?
Sent: Wednesday, September 05, 2012 4:20 PM
Subject: LF: Re: Reception report from Norway
Thanks Robert and Graham.
Being a bit of an
"Eigenbroetler" I decided not to use the Opera software from Jose Ros but rather
make my own. Thus there is no internet broadcasting when I transmit, and PSK
reporter apparently assigns some wrong default QTH to incoming reception
reports.
If you want to
use it, you have to generate an Opera 110... sequence once for your callsign by
typing
opgen df6nm >opera.txt
into a DOS box, and expand it to an
opera.dat file containing 16 IQ-samples per symbol using
optxtdat
Then to start a
transmit session, type
start sndoutpt /sr=12000 /dec=6144
/fc=2070
which opens a tiny SndOutpt window and waits to be fed with an IQ
data file. The upsampling factor dec is 750 times the dash length in seconds,
and should be 6144 for Op-32 or 1536 for Op-8 mode. The desired audio frequency
fc can also be edited at runtime. Finally the transmission is
initiated by
copy opera.dat audio.dat
A nice feature on the side is
that the dashes will have smooth edges, which minimize keyclicks when used with
a linear transmitter.
I'm still working
on the receive side, and the first results using coherent correlation have been
very promising.
Best
73,
MArkus Re: Reception report from Norway Tue Sep 4, 2012
5:59 pm
"graham787" <g0nbd@...>
Well, I think
DF6NM is also confused as to why he is located in the UK
.... all we can ask
is that Markus checks the qra locator entered into Opera
and if this is
correct, then ,will have to flag this up to Philip / Jose (PSK
Map)for
investigation
The Phantom (of
the opera) Tx spots are to ensure Rx stations are showing
on the psk-map
'before' any decode is made ... a handy check as often you
could be the
'only' station on the band and with 32 mins tx cycle , its
nice to know
there is someone at the other end !
73 -Graham.
--- In
rsgb_lf_group@..., "robert_la4ana" <la4ana73@...> wrote:
>
>
Thanks to all for last night's TX activity. It was very helpful in order
to
gain an impression of my new 136 kHz receive set-up. I am currently using
a
untuned 65 square meter loop antenna (oriented North/South) and a
Kenwood
TS-590, no seperate pre-amp (yet).
>
> During my first
"night at the Opera" I received the following stations (data
recovery from
PSK-reporter):
>
> sNR mode MHz rxTime Call Loc
> -28 OPERA
0.136000 03.09.2012 19:30 PA0A JO33DE
> -34 OPERA 0.136000 03.09.2012
20:07 G3XDV IO91VT
> -25 OPERA 0.136000 03.09.2012 20:28 PA0A
JO33DE
> -33 OPERA 0.136000 03.09.2012 20:40 G3XDV IO91VT
> -35
OPERA 0.136000 03.09.2012 21:13 G3XDV IO91VT
> -38 OPERA 0.136000
03.09.2012 21:45 G3XDV IO91VT
> -13 OPERA 0.136000 03.09.2012 21:57 DK7FC
JN49IK
> -37 OPERA 0.136000 03.09.2012 22:18 G3XDV IO91VT
> -14
OPERA 0.136000 03.09.2012 22:29 DK7FC JN49IK
> -31 OPERA 0.136000
03.09.2012 22:56 DF6NM IO91UX
> -31 OPERA 0.136000 03.09.2012 23:24 G3XDV
IO91VT
> -37 OPERA 0.136000 04.09.2012 01:10 G3XDV IO91VT
> -35
OPERA 0.136000 04.09.2012 01:43 G3XDV IO91VT
> -34 OPERA 0.136000
04.09.2012 02:16 G3XDV IO91VT
> -30 OPERA 0.136000 04.09.2012 02:48 G3XDV
IO91VT
> -29 OPERA 0.136000 04.09.2012 03:21 G3XDV IO91VT
> -25
OPERA 0.136000 04.09.2012 03:54 G3XDV IO91VT
> -35 OPERA 0.136000
04.09.2012 04:27 G3XDV IO91VT
>
> It puzzles me a bit to receive
DF6NM at locator IO91UX instead of in Germany,
but it seems that some other
stations also report that locator. In addition,
PSK-reporter is reporting
many decodes of my own call. However, I was not
transmitting nor did I
activate the Opera beacon function. May be someone can
explain, as I am
relatively new to Opera and PSK-reporter.
>
> Keep up the good work.
I hope to join as a transmitting station as well in the
not too distant
future.
>
> 73 de Robert
>
LA4ANA
>
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