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Content preview: Yes , Marco The user interface is indeed simple , and the
equipment/system over heads are minimal , also can add, the system was designed
to allow access to data for the many CW and QRSS transmitters on 136/500
.... however the DSP engine is where the real work is carried out , (under
wraps of course) , the low level of false decodes and s/n levels , gives
a insight to the development in this area , [...]
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Subject: Re: LF: Re: Experimental software for WSPR-8 and -32
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Yes , Marco=20
The user interface is indeed simple , and the equipment/system =
over heads are minimal , also can add, the system was designed to =
allow access to data for the many CW and QRSS transmitters =
on 136/500 .... however the DSP engine is where the real work =
is carried out , (under wraps of course) , the low level of false =
decodes and s/n levels , gives a insight to the development in =
this area ,=20
No time locking=20
No sound card calibration=20
Lax frequency stability requirements=20
OOK or FSK may be used =20
The On/Off keying has benefits other than allowing access via =
simple Tx systems , it gives immunity to Doppler spread and =
allows the averaging of the data to be used for detection , whilst =
embodying non-liner routines to eliminate static crash problems . =
it not being possible to 'loose' lock , due to the coding scheme . =
performance on vhf is also significant and the system has been =
included in the next generation of vhf smart beacons. =20
I think the difference between data demodulation and carrier =
detection are often blurred , Markus correlation process is =
notable , with a 10 dB gain, however , the Tx pattern is detected =
/ compared against 'known reference' , the same during the =
testing of the OP4 Hr , 8k audio mode , at -50 dB was 10 dB =
sort of the spec-lab detection level , but again that was a =
data / carrier comparison , 8K has yet to be seriously air-tested , =
its quite possible , Stefan will achieve considerable range , if =
he transmits at the previous test levels , due to the long tx =
pulses , the Op4 Hr signal , also shows on spec-lab , so test =
data is not lost if decode fails.
As to what is better , that remains to be seen under operational =
conditions , Jose is quite confident the OP on/off system is fit =
for purpose and predicts a practical gain of only -3 dB from a =
change to the modem to mfsk or psk , ( theoretical levels are =
-6 ) but these do not take realistic path variations into account =
, exchanges have taken place on this subject , a psk version could =
be some -5/6 dB better , but then access by all but very few =
MF/LF stations would be possible ,=20
The benefits of the combined data processing and modulation scheme =
can be demonstrated to off set the dB losses=20
73 -G..
From: IK1WVQ Mauro=20
Sent: Saturday, September 22, 2012 8:38 PM
To: rsgb_lf_group@blacksheep.org=20
Subject: Re: LF: Re: Experimental software for WSPR-8 and -32
hi,
"simple" =3D=20
- modulation ON-OFF , no needs for linear P.A.
- no precise timing (=3D little beacons stand_alone. no PC.)
- TX only 50% on. (to take in mind when compare whith other "continous" =
mode at parity of output power.)=20
- the coding scheme is more robust than WSPR.=20
73 de Mauro IK1WVQ
At 17.36 22/09/12, you wrote:
Interesting ...
=20
Define 'simple' ?
=20
G..
From: IK1WVQ Mauro=20
Sent: Saturday, September 22, 2012 4:21 PM
To: rsgb_lf_group@blacksheep.org=20
Subject: Re: LF: Re: Experimental software for WSPR-8 and -32
Hi to all,
only a question to the experts:
is the SLOW WSPR better than the simple OPERA-32 ???
73 de Mauro K1WVQ
At 16.57 22/09/12, you wrote:
Hi Markus, LF,=20
It works! First reception of DF6NM in WSPR-8 here.
Timestamp Call MHz SNR Drift Grid Pwr Reporter RGrid km az=20
2012-09-22 14:40 DF6NM 0.137538 0 0 JN59nj 0.5 =
DK7FC/8 JN49ik 175 272 =20
2012-09-22 14:30 DK7FC 0.137499 +13 0 JN49ik 1 =
DK7FC/8 JN49ik 0 0=20
I have used a virtual audio cable, with success.
For those who still try without success, here is my description in =
simple words.
If your RX is a HF TRX at 136 kHz dial setting, then the tone of =
DF6NM appears at 1440 Hz, the tone of DK7FC appears at 1430 Hz.
The microphone input is used and it must be defined as the standard =
audio input device. This is important since the SounInput program =
related always to the default input.
Then soundinput generates the audio file and replays it in =
SoundOutput.
SoundOutput replays it to the standard audio output device, which is =
the virtual audio cable 1 for me. So VAC1 must be defined as the =
standard output device!
The sound input of the WSPR software must be set to VAC1 too.
The file wspr-8_rx.bat must be edited. If the BFO frequency in the =
WSPR software is 1500 Hz, then this value must be inserted for fc in the =
row for the soundoutput settings.
Set the value for fc for soundinput (the row below) to 1450 Hz and =
save the file.
Then double click wspr-8_rx.bat and wait some minutes. You may watch =
the small souninput and soundoutput windows...
Hope it works for others as well now.
73, Stefan7DK7FC
Nessun virus nel messaggio in arrivo.
Controllato da AVG - www.avg.com=20
Versione: 9.0.930 / Database dei virus: 2441.1.1/5285 - Data di =
rilascio: 09/22/12 08:34:00
Nessun virus nel messaggio in arrivo.
Controllato da AVG - www.avg.com=20
Versione: 9.0.930 / Database dei virus: 2441.1.1/5285 - Data di =
rilascio: 09/22/12 08:34:00
------=_NextPart_000_0084_01CD990B.B4F1AE00
Content-Type: text/html;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META content=3Dtext/html;charset=3Diso-8859-1 =
http-equiv=3DContent-Type>
<META name=3DGENERATOR content=3D"MSHTML 8.00.6001.19328"></HEAD>
<BODY style=3D"PADDING-LEFT: 10px; PADDING-RIGHT: 10px; PADDING-TOP: =
15px"=20
id=3DMailContainerBody leftMargin=3D0 topMargin=3D0 =
CanvasTabStop=3D"true"=20
name=3D"Compose message area">
<DIV>Yes , Marco </DIV>
<DIV> </DIV>
<DIV> The user interface is indeed =
simple ,=20
and the equipment/system over heads are =
minimal ,=20
also can add, the system was designed to =
allow=20
access to data for the many =
CW =20
and QRSS transmitters on 136/500 ....=20
however the DSP engine is where =
the =20
real work is carried out , (under wraps of =
course) , the low level of false decodes =
and =20
s/n levels , gives a insight to =
the =20
development in this area , </DIV>
<DIV> </DIV>
<DIV>No time locking </DIV>
<DIV>No sound card calibration </DIV>
<DIV>Lax frequency stability requirements </DIV>
<DIV>OOK or FSK may be used </DIV>
<DIV> </DIV>
<DIV>The On/Off keying has benefits other =
than=20
allowing access via simple Tx systems , it =20
gives immunity to Doppler =20
spread and allows the averaging of =
the data=20
to be used for detection , whilst =
embodying =20
non-liner routines to eliminate static crash problems =
. =20
it not being possible to 'loose' lock , due to =
the =20
coding scheme . performance on vhf is also=20
significant and the system has been included in=20
the next generation of vhf smart beacons. =
=20
</DIV>
<DIV> </DIV>
<DIV>I think the difference between data =20
demodulation and carrier detection are often blurred , =
Markus correlation process is notable , =
with=20
a 10 dB gain, however , the Tx pattern is =20
detected / compared against 'known =
reference' ,=20
the same during the testing of the =
OP4 Hr ,=20
8k audio mode , at -50 dB was 10 dB=20
sort of the spec-lab detection level =
,=20
but again that was a data / carrier comparison , 8K =
has yet=20
to be seriously air-tested , its =
quite =20
possible , Stefan will achieve considerable =
range , if=20
he transmits at the previous test levels =
, =20
due to the long tx pulses , the Op4 Hr =
signal ,=20
also shows on spec-lab , so test data is =
not =20
lost if decode fails.</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>As to what is better , that remains =
to be=20
seen under operational conditions , Jose is =
quite =20
confident the OP on/off system is fit =
for =20
purpose and predicts a practical gain of =
only=20
-3 dB from a change to =
the modem=20
to mfsk or psk , ( theoretical levels =
are =20
-6 ) but these do not take realistic path=20
variations into account , exchanges have taken=20
place on this subject , a psk version =
could be=20
some -5/6 dB better , but then access by =
all =20
but very few MF/LF stations would =
be =20
possible , </DIV>
<DIV> </DIV>
<DIV>The benefits of the combined data =
processing =20
and modulation scheme can be demonstrated =
to =20
off set the dB losses </DIV>
<DIV> </DIV>
<DIV>73 -G..</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV style=3D"FONT: 10pt Tahoma">
<DIV><FONT size=3D3 face=3DArial></FONT><BR></DIV>
<DIV style=3D"BACKGROUND: #f5f5f5">
<DIV style=3D"font-color: black"><B>From:</B> <A=20
title=3D"mailto:ik1wvq@stmb.it CTRL + Click to follow link"=20
href=3D"mailto:ik1wvq@stmb.it">IK1WVQ Mauro</A> </DIV>
<DIV><B>Sent:</B> Saturday, September 22, 2012 8:38 PM</DIV>
<DIV><B>To:</B> <A=20
title=3D"mailto:rsgb_lf_group@blacksheep.org CTRL + Click to follow =
link"=20
href=3D"mailto:rsgb_lf_group@blacksheep.org">rsgb_lf_group@blacksheep.org=
</A>=20
</DIV>
<DIV><B>Subject:</B> Re: LF: Re: Experimental software for WSPR-8 and=20
-32</DIV></DIV></DIV>
<DIV><BR></DIV>hi,<BR><BR>"simple" =3D <BR>- modulation ON-OFF , no =
needs for=20
linear P.A.<BR>- no precise timing (=3D little beacons stand_alone. no =
PC.)<BR>-=20
TX only 50% on. (to take in mind when compare whith other "continous" =
mode at=20
parity of output power.) <BR>- the coding scheme is more robust than =
WSPR.=20
<BR><BR>73 de Mauro IK1WVQ<BR><BR><BR>At 17.36 22/09/12, you wrote:<BR>
<BLOCKQUOTE class=3Dcite cite=3D"" type=3D"cite">Interesting =20
...<BR> <BR>Define 'simple' =20
?<BR> <BR>G..<BR><BR><B>From:</B> <A =
href=3D"mailto:ik1wvq@stmb.it">IK1WVQ=20
Mauro</A> <BR><B>Sent:</B> Saturday, September 22, 2012 4:21 =
PM<BR><B>To:</B>=20
<A title=3D"mailto:rsgb_lf_group@blacksheep.org CTRL + Click to =
follow link"=20
=
href=3D"mailto:rsgb_lf_group@blacksheep.org">rsgb_lf_group@blacksheep.org=
</A>=20
<BR><B>Subject:</B> Re: LF: Re: Experimental software for WSPR-8 and=20
-32<BR><BR>Hi to all,<BR><BR>only a question to the experts:<BR><BR>is =
the=20
SLOW WSPR better than the simple OPERA-32 ???<BR><BR>73 de Mauro=20
K1WVQ<BR><BR><BR><BR><BR>At 16.57 22/09/12, you wrote:<BR>
<BLOCKQUOTE class=3Dcite cite=3D"" type=3D"cite">Hi Markus, LF, =
<BR><BR>It works!=20
First reception of DF6NM in WSPR-8 here.<BR><BR>Timestamp Call MHz =
SNR Drift=20
Grid Pwr Reporter RGrid km az <BR> 2012-09-22 14:40 =
DF6NM 0.137538 0 0 =20
JN59nj 0.5 DK7FC/8 =
JN49ik =20
175 272 <BR> 2012-09-22 14:30 =20
DK7FC 0.137499 +13 0 =
JN49ik 1 DK7FC/8 =
JN49ik =20
0 0 <BR><BR>I have used a virtual audio cable, with=20
success.<BR><BR><BR>For those who still try without success, here is =
my=20
description in simple words.<BR><BR>If your RX is a HF TRX at 136 =
kHz dial=20
setting, then the tone of DF6NM appears at 1440 Hz, the tone of =
DK7FC=20
appears at 1430 Hz.<BR><BR>The microphone input is used and it must =
be=20
defined as the standard audio input device. This is important since =
the=20
SounInput program related always to the default input.<BR><BR>Then=20
soundinput generates the audio file and replays it in=20
SoundOutput.<BR><BR>SoundOutput replays it to the standard audio =
output=20
device, which is the virtual audio cable 1 for me. So VAC1 must be =
defined=20
as the standard output device!<BR><BR>The sound input of the WSPR =
software=20
must be set to VAC1 too.<BR><BR>The file wspr-8_rx.bat must be =
edited. If=20
the BFO frequency in the WSPR software is 1500 Hz, then this value =
must be=20
inserted for fc in the row for the soundoutput settings.<BR><BR>Set =
the=20
value for fc for soundinput (the row below) to 1450 Hz and save the=20
file.<BR><BR>Then double click wspr-8_rx.bat and wait some minutes. =
You may=20
watch the small souninput and soundoutput windows...<BR><BR>Hope it =
works=20
for others as well now.<BR><BR>73, Stefan7DK7FC<BR><BR><BR>Nessun =
virus nel=20
messaggio in arrivo.<BR>Controllato da AVG - <A =
href=3D"http://www.avg.com/"=20
eudora=3D"autourl">www.avg.com</A> <BR>Versione: 9.0.930 / Database =
dei virus:=20
2441.1.1/5285 - Data di rilascio: 09/22/12=20
08:34:00</BLOCKQUOTE><BR>Nessun virus nel messaggio in =
arrivo.<BR>Controllato=20
da AVG - <A href=3D"http://www.avg.com/" =
eudora=3D"autourl">www.avg.com</A>=20
<BR>Versione: 9.0.930 / Database dei virus: 2441.1.1/5285 - Data =
di=20
rilascio: 09/22/12 08:34:00</BLOCKQUOTE></BODY></HTML>
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