PSK63 is significantly faster than RTTY, and consumes less
bandwidth. The PSKCORE engine can simultaneously decode all PSK63
signals within a 3 khz band segment; coupled with callsign
extraction logic, this makes for a powerful DXing and contesting
tool.
Why replace something like RTTY that has worked so well for so long
of time? For the same reasons that we replace other things that have
worked so well for a long time -- because we've found or developed
something that is in all respects superior.
"Replace" doesn't mean "eliminate", John. People still hunt game
with bow and arrow, and fire up steam engines. If PSK63 did replace
RTTY in DXing and contesting, there'd be RTTY QSOs for a long time
to come. Humans are nostalgic.
Since PSK63 hasn't replaced RTTY in DXing and contesting, its likely
that PSK63 is not, in fact, superior to RTTY in all respects. I find
RTTY to be more robust in the face of QRM and QRN. Also, I suspect
that PSK63's speed sometimes works to its disadvantage: most ops
can't type fast enough to keep up, and that makes some feel harried.
73,
Dave, AA6YQ
--- In [email protected], John Becker <[EMAIL PROTECTED]> wrote:
>
> I did not know there was even an effort to replace RTTY.
> And that brings me to this question. Why replace something
> like RTTY that has worked so well for so long of time?
>
>
> At 11:01 AM 2/20/06, you wrote:
> >RTTY remains the digital-mode-of-choice for DXing, despite efforts
> >to replace it with PSK31 or PSK63. The MMTTY and MMVARI engines
> >enable freeware soundcard applications to perform well in this
mode.
> >Given the continuing interest in DXing and Contesting, I doubt
we'll
> >see any significant decline in RTTY.
> >
> >I do agree with the overall point of your post, Rick. No one owns
a
> >frequency. Good judgement and basic manners go a long way...
> >
> > 73,
> >
> > Dave, AA6YQ
> >
> >
> >--- In [email protected], KV9U <mrfarm@> wrote:
> > >
> > > Bonnie,
> > >
> > > From my frequent monitoring, I would have to say that the only
> >really
> > > popular mode is PSK31. It is not uncommon now to have more
PSK31
> >signals
> > > within a 2.3 KHz passband, than even cw signals during a
contest.
> >Like
> > > this weekend you might find 4 to 6 cw signals but you would
find
> >up to
> > > 12 PSK31 signals in the "watering hole" on 20 meters.
> > >
> > > From time to time there are other digital modes being used, of
> >course,
> > > and Olivia seems to be the third most common, (after RTTY
> >keyboarding),
> > > even though no where near the concentration of PSK31.
> > >
> > > What I would like to see are some practical bandplans that
have a
> > > recommended spot frequency for digital modes. We do have that
by
> >default
> > > now on 20 meters for the .070 PSK31, and similar areas on 40
and
> >80
> > > meters. The RTTY operation is often about 10 KHz higher as you
> >point
> > > out. But except for contesting, RTTY is not as popular anymore
as
> >other
> > > digital modes and probably will drop off even more as older
hams
> >become SK.
> > >
> > > No one has any particular claim to any part of any band, other
> >than
> > > being able to work in the regulated areas for digital or for
those
> >who
> > > follow bandplans, within the bandplan recommendation. If you
go to
> >the
> > > ARRL site and look at their bandplan recommendations, one
realizes
> >that
> > > they do not distinguish between digital modes except for the
> >automatic
> > > subband area that they call packet. Everything else is called
RTTY.
> > >
> > > If we had a spot frequency that was recommended for newer modes
> >that
> > > have not had a de facto "watering hole," like PSK31, then we
could
> >start
> > > from there and if the frequency was busy, move up to the next
> >available
> > > slot. As it stands right now, there can be Olivia, or Domino,
or
> >MFSK16,
> > > etc. over fairly wide areas and it is very easy to miss a call.
> >Since
> > > there are not that many stations that work these modes, it
would
> >reduce
> > > the number of times that calls are made with no response.
> > >
> > > Another consideration is the dearth of digital operation
(except
> >for
> > > Pactor e-mail) on 30 meters. I have called many times on this
band
> >and
> > > had no luck with other stations being around. If you have to
make
> >a sked
> > > via the internet to even work a mode on a given band, that
doesn't
> >say
> > > much about that mode:( But when I compared the recommendations
> >between
> > > say Region 1 and 2, they don't even agree on where data modes
> >should be
> > > operating on 30 meters. Region 1 is 10.140 and up and Region 2
is
> >10.130
> > > to 10.140 if I read it correctly. Maybe it would be wise to
have a
> > > domestic starting frequency and a DX starting frequency? For
> >example, I
> > > have often moved just above the commercial RTTY station near
> >10.130 and
> > > called. Maybe I should move up to 10.140 dial frequency and
then
> >try
> > > 10.141 or 10.141.5?
> > >
> > > In the final analysis, there are way too many new different
> >digital
> > > modes, used very infrequently, to have special subbands, but
they
> >could
> > > have a recommended starting frequency for calling. Otherwise my
> >rule of
> > > thumb is to see where the last PSK31 station is operating and
go
> >just
> > > above that and start calling with whatever mode de jour I
happen
> >to be
> > > using at that time.
> > >
> > > Comments from others?
> > >
> > > 73,
> > >
> > > Rick, KV9U
> > >
> > >
> > >
> > > expeditionradio wrote:
> > >
> > > > Olivia is now popular for digital keyboarding.
> > > > Since Olivia has so many possible modes in it,
> > > > there is a search for a 500Hz starting point.
> > > >
> > > > I propose that we, as a group of Olivia operators,
> > > > use 14076kHz-14079kHz, as a centre-of-activity
> > > > starting point for Olivia 500/8 .
> > > >
> > > > Olivia 500/8 (or 500/16) USB Dial Frequencies proposed:
> > > > 14075.5
> > > > 14076.0
> > > > 14076.5
> > > > 14077.0
> > > > 14077.5
> > > > 14078.0
> > > >
> > > > 14076-14079kHz is compatible and recommended by the IARU
Region
> > > > Bandplans for all regions of the world for (500Hz) digital
> > > > keyboarding modes.
> > > > It is compatible with the Amateur Radio rules of most
countries.
> > > > http://www.hflink.com/bandplans/
> > > >
> > > > Between the PSK activity (14070-14073) and RTTY activity
> > > > (14080-14089), it may attract new operators for Olivia QSOs.
> > > >
> > > > A few digital keyboarding modes share this frequency range,
> > > > and the keyboarding activity is very similar to Olivia, such
as
> > > > MFSK, etc.
> > > >
> > > > Bonnie KQ6XA
> > > >
> > > >
> > > >
> > >
> >
> >
> >
> >
> >
> >
> >
> >Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org
> >
> >Other areas of interest:
> >
> >The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/
> >DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy
discussion)
> >
> >
> >Yahoo! Groups Links
> >
> >
> >
> >
>
Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org
Other areas of interest:
The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/
DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion)
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