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No matter Markus, English is a funny language
at the best of time's and the slang can be
even more difficult ... hihi
Well , the Op mode design criteria was
not to develop , the ultimate low noise data
mode , It was to allow access to data
transmission with the most simple transmitter , I think
in this capacity , the mode has achieved its
primary goal.
What has been coded by Jose and what
was envisaged are quite far apart, but in hind
sight , perhaps not un-expected outcome , changing the
modulation system could gain another 6 dB of sensitivity
, but then , its deployment is restricted to
more advanced systems , catch-22
Of course time is used to lower the s/n by
increasing the energy and CPU
usage is deployed to recover the signal , but
these are immovable objects, time locking could be
used to reduce the CPU loading , but then portable
/ field work would not be possible ..
It is a 'one pass' data mode and in this capacity as
far can be gathered , is the lowest s/n
at the moment , but the main thing is , its given
access to bands that normally where
considered out of most stations reach !
As I say
' The best thing about Op is the number of reasons
it will not work '
All we need now is for some one
to 'go fly a kite ' on 8Khz ; -)
73 -G ..
( ''Go fly a Kite'' also has two senses
! )
Sent: Tuesday, August 14, 2012 12:14 PM
Subject: Re: LF: What is that effect?
Hi Graham,
oops, I'm sorry
I wasn't aware that the verb "honk" is also used as
described as "Sense 4" on
Though I do not share the belief that Opera mode is the latest and
greatest achievement in weak signal technology, I certainly did not intend to
insult it, or anyone working with it.
Best 73,
Markus (DF6NM)
-----Ursprüngliche Mitteilung-----
Von: Graham
<[email protected]>
An: rsgb_lf_group
<[email protected]>
Verschickt: Di, 14 Aug 2012 12:01
am
Betreff: Re: LF: What is that effect?
As its a 'Opera' signal could be a
little 'VIBRATO' adding artistic effect ?
Though, 'HONK Mode' could be
misinterpreted ...............
G :0)
Sent: Sunday, August 12, 2012 11:15 PM
Subject: Re: LF: What is that effect?
Stefan
which effect do you mean?
- the undecipherable garbage in Morse code? Must be
toot-toot mode *)
- the gap in the middle, between "ts" and "nr"?
Must have been a temporary outage on the transmit side, or a SpecLab timewarp at
G4WGT.
- The weak +- 10 Hz sidelines at the
beginning? Probably a spurious modulation from the transmitter or
power supply, or perhaps an artifact the receiver AGC, acting on a pair of local
signals outside the spectrogram range. Or a Perseid meteor trail, moving at 20
km/s (no, not really).
Best 73,
Markus (DF6NM)
*) Here in DL (and probably elsewhere),
there is a wedding rite that the newly married couple
is driving from church in a flower decorated car, followed by their
friends and relatives in a convoy of cars. They follow a white chalk line
painted on the street **), and usually keep honking their horns in an
erratic manner. Listening to one or several
instantaneous Opera signals never fails to remind me of that sound - so I
privately dubbed it "honk mode".
**) Rumour has it that this white line is primarily
meant to guide the couple in safe distance around the houses of their former
lovers.
Sent: Sunday, August 12, 2012 4:33 PM
Subject: LF: What is that effect?
LF, Just seen this on the G4WGT garbber, see
attachment. Where does this frequency spreading effect come
from? Experts: go! 73, Stefan
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