All very mysterious Mal , may be it can
predict the winner in the 2-30 at Chepstow ?
----- Original Message -----
Sent: Saturday, December 08, 2012 6:03
PM
Subject: LF: R7NT Op32 correlation
detection
Alex, LF,
the Op32 signal from R7NT was well visible in the
21 mHz TA window. I made two recordings of a 2 Hz band around the anounced
frequency, one from 22:08 to 08:11 UT and another one in daylight from
12:06 to 15:25. Then I ran both through my Opera correlation
detector, see attached result.
The first two lines are a list of
several known active Opera stations. Each of these was tried in
the cross correlation procedure. The
lines below that are the successful hits. Going from left to right,
the printed output contains:
time window for correlation (decimal UT
hours before / after midnight last night),
frequency of carrier peak,
uncalibrated "raw" dB of detected
carrier,
carrier SNR after a "carrier autofocus"
procedure, which removes small amouts of chirp and optimally weighs the
amplitude for QSB,
SNR on the Opera scale (ie. carrier in 2.5
kHz minus 4 dB),
either c or i for a coherent or
incoherent demodulation,
UT hour of the winning correlation peak
(corresponds to the start of the transmission,
SNR of correlation peak in time
domain,
callsign of the winner of the correlation
procedure.
Now running a recording on 137567 to look for
UA0AET tonight.
Best 73,
Markus (DF6NM)
Sent: Friday, December 07, 2012 8:44 PM
Subject: LF: 73! Alex R7NT beacon Op32 on 137.588 now and till to
my sunrise(abt 5z)
I start the beacon Op32 on 137.588 now and till to my sunrise(abt
5z)
I plan to acty in QRSS3\10 tomorrow night on abt 137.705
TX abt
60W Output
TX\RX Ant sLoop 200m total length abt @12...18m
73! Alex
R7NT
