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Ok Marcus ,
Needs must , I dont think the frequency
translation would be a problem, but any modification to
the envelope parameters will degrade performance ,
the low s/n sdr decodes , point to the
lack of 'ringing' in the filters , enabling much
lower levels , notably , using the £5 dongle in
direct-sample , I see the modulation is HF of
the carrier , where with any of the
conventional Rx's , there is a splash across
the band .
Strange that Iceland has not shown a decode ,
its about 1000 K north of the direct path
and half the range , expected ?
73 -G.
Sent: Friday, June 28, 2013 8:53 PM
Subject: Re: LF: VO1NA Op32 137.555 kHz
yes. I'm aware that Opera should nominally be
fed with straight full-band SSB. But going by the first results, the
preprocessing seemed to help a lot in the presence of our strong DCF
splatters, so I left it in. In any case I'd need SL as an audio mixer to
accomodate my fixed 135.5 kHz LO.
Best 73,
Markus
Sent: Friday, June 28, 2013 2:55 PM
Subject: Re: LF: VO1NA Op32 137.555 kHz
Marcus ,
Is the feed to Opera
still being pre-processed via SL
?
G..
Sent: Friday, June 28, 2013 9:50 AM
Subject: Re: LF: VO1NA Op32 137.555 kHz
Hi Joe,
during this week, your signal has been detected
here every single night, along with Mike and Spiros.
I have been running the "deep
search" correlation detector in parallel with the original Opera
software. Here's the number of spots
received here in five nights since Sunday:
call opds
Opera
hits decodes
VO1NA 12
1
SV8CS 8 4
G3XDV
11 8
Detailed list: http:\\ df6nm.bplaced.net/opera/Opera_vs_opds.txt (please
remove space in link).
Best 73, and thanks for the fine
signals!
Markus (DF6NM)
Sent: Thursday, June 27, 2013 11:54 PM
Subject: LF: VO1NA Op32 137.555 kHz
Dear Group,
Will be QRV tonight and grateful
for any report.
73
Joe
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