Ok Stefan,
QRT , next to look at the reports , I think
tonight , minimum decode levels are very
close , the longer OP modes are much lower , but the qsb
on 500 tends to prevent gain being made by
extended times
Opera was designed to be sent by
a normal CW Tx , psk/fsk
has a dB advantage , but not all stations
can send fsk or psk, , especially on 136 ..
Without the racal ma1723 , it would be difficult
to use fsk or psk on 500 , ( not that
psk is any use on 500 .. too much
phase shifting )
Not sure on the wspr settings , I dont think
the software can produce 12 Khz
, stations use ,pic-dds , that may be
a way ahead ?
But tonight , using the m-delt4 sound card , I
found the mixer monitor could be used
to combine 2 channels , so the audio
quality was much better than in the past, with
no IMP showing ...
73 -G.
Sent: Friday, July 13, 2012 11:26 PM
Subject: Re: LF: DUAL BEACON WSPR + OPERA 500Khz
Hi Graham, LF/MF,
Nice setup to see which mode is
"better". Rik/ON7YD has done some tests a few months ago i remember. Now you
need many receiving stations who monitor these 2 modes to the same time as
well.
Compared to WSPR i clearly find Opera an advantage regarding the ease
of keying the PA without the need of FSK.
On LF i could run both modes since
i have the IQ upconverter (can WSPR set to an output frequency of 12.5 kHz?? (to
be mixed with 125 kHz)) but on MF i would need to extend my setup...
I
really would like to join in tonite but i can't :-(((
73, GL,
Stefan/DK7FC
Am 13.07.2012 20:20, schrieb Graham:
No cheating , carriers are identical !
tnx Gary for grabber
73 -G.
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Sent: Friday, July 13, 2012 7:06 PM
Subject: LF: DUAL BEACON WSPR + OPERA 500Khz
All,
DUAL BEACON WSPR + OPERA 500Khz
Running dual beacon , parallel Tx
times ......Tx 100% duty cycle
Dial set 500.000 Khz USB
73 - Graham
G0NBD
