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I ignore on/off keyed data normally because on 500 Khz
around EU with a half reasonable signal CW does the trick.
also I do not report Beacon acty.
At present I am comparing Opera v QRS to get first hand
info and so far all Opera signals that I can decode are also visible on the
waterfall and the majority AUDIBLE
mal/gh3kev
----- Original Message -----
Sent: Monday, January 30, 2012 2:53
PM
Subject: Re: LF: 500 opera V
Hi Markus
No Mal, Markus said its his Guess not the
Answer :-)
Of course
Marcus the figures stack up so I have to agree, in fact practice agrees at
this very moment as I stare at my monitor displaying the
"Challenge".
Clearly there are other factors at work to explain my
practical experience of ZERO reports of my QRS3 signal over a period of YEARS
on 10m, yet multiple world wide reports of my WSPR (when the conditions are
right of course) and all the rig has done is QSY and changed mode. We can rule
out this being a frequency phenomena too as I have changed the QRS from above
WSPR to below..
One of those factors is the human interface, Mal
himself said the other day that he has seen carriers come and go on the band
but couldn't be bothered to check them out.
Then there is the operator who
can't be bothered to send a report, with WSPR and OPERA he has no choice,
other than to hide away from the truth with no internet connection..
The
need for human presence with QRS is alleviated by full time grabbers so we
can't fully blame the 'I was in bed when conditions were right
syndrome'.
As for the Answer lets give it a go, a "Challenge" is
running, if anyone notices anything different please don't post it publicly
although I will welcome reports direct.
BTW QRS3 carries about the same
Data as is possible in OP4 in about the same time, variable depending
upon the actual Morse characters, it could be longer maybe for Y0YQQ which
OPERA could do in the usual period.
73 Eddie
On 30/01/2012
11:59, Markus Vester wrote:
Eddie,
my guess is that in the "Opera vs QRSS" challenge, Mal's odds
wouldn't be bad at all:
Graham stated that Opera-8 should decode above SNR -32
dB in 2.5 kHz (average). Referenced to 1 Hz, this is +2
dBHz average, or about + 5 dBHz for the CW carrier.
QRSS-10 could transmit a callsign approximately in the same
amout of time. It is received eg. in Argo at 0.084 Hz FFT
bandwidth, equivalent to 0.13 Hz or -9 dBHz noise
bandwidth. Thus the marginal Opera signal would be a very comfortable
14 dB SNR in QRSS.
We typically give "O" reports on QRSS signals above 10 dB SNR.
This would mean that QRSS could be twice as fast as Opera...
Some may prefer the digital decoder from the visual one
because "100% all-or-nothing". In my opinion this is not a benefit, as
there is no way to detect a signal below the threshold, and judge
how much was missing or what type of QRM was present. Of course, with a
digital mode yu don't have to bother investigating spectrograms -
well, borrowing a term once coined by G3KEV, then that's the
ultimate "lazy man's CW" ;-)
Best 73,
Markus (DF6NM)
...
OP31 expected round -38 dB s/n
(ave) OP8 ~ -32 dB
G..
-----Ursprüngliche
Mitteilung----- Von: qrss <[email protected]>An:
rsgb_lf_group <[email protected]>Verschickt:
So, 29 Jan 2012 9:25 pm Betreff: Re: LF: 500 opera V
So Mal Can
you see or hear my 12WPM Morse ident between my OPERA signals? I doubt it. I
could put QRS3 between, that would be a good test. Say a cryptic message for
decipher, one transmission and that is it, if Opera decodes and the QRS
remains unread OPERA wins. Eddie On 29/01/2012 19:53, Graham
wrote:
R Mal
Those signals where about 10 db over
the limit , so will show , OP16 , is about
6 dB lower again. but a decode is a decode..
good start.
14:44 500 G3ZJO de G3KEV Op4 142 miles -22 dB in SCARBOROUGH
136 is being most used at
the moment RA9CUA is monitoring
G..
Sent: Sunday, January 29, 2012 6:14 PM
Subject: LF: 500 opera V
MF
On 500 Khz so far signals decoded in Opera mode have
been visible on the waterfall therefore had the mode been QRSS the result
would have probably been better and quicker in QRS 3 - 10
The mode is however interesting and needs little
operator intervention.
de mal/g3kev
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