How about 2 PSK tones at 22.75 baud spaced 50 Hz apart that sends 101010100101010111110000 ?
Walt/K5YFW
-----Original Message-----
From: digitalradio@yahoogroups.com
[mailto:digitalradio@yahoogroups.com]On Behalf Of Andrew O'Brien
Sent: Wednesday, February 22, 2006 12:36 PM
To: digitalradio@yahoogroups.com
Subject: [digitalradio] Re: NTS and traffic handling and digital
-Dave,
How about something as distinctive as RTTY's RYRYRYRYRYRYRY? We all
recognize RYs without decoding it with a terminal. Your tone idea
is good, anything that is easy to recognize with the ear would be
good. I wonder how QRLQRLQRLQRLQRLQRLQRLQRLQRL sounds in RTTY?
Andy K3UK
-- In digitalradio@yahoogroups.com, "Dave Bernstein" <[EMAIL PROTECTED]>
wrote:
>
> If "QRL?" in CW is too retro, we could specify a sequence of eight
1
> khz tones of 250 ms duration separated by 250 ms to convey the "is
> this frequency in use?" message. It would be distinctive in a
> waterfall display, and could easily be recognized by application
> software.
>
> 73,
>
> Dave, AA6YQ
>
> --- In digitalradio@yahoogroups.com, "jgorman01" <jg6164@> wrote:
> >
> > The problem here is that if the FCC drops Morse Code, they won't
be
> > able require CW be used for this purpose. You'll also have
folks
> that
> > are adamant against having to learn Morse Code for this purpose.
> >
> > Also, I usually don't listen to the frequency, the waterfall
> suffices
> > for that. Recognizing a QRL in CW may not work well in this
> situation.
> >
> > Jim
> > WA0LYK
> >
> > --- In digitalradio@yahoogroups.com, "Dave Bernstein" <aa6yq@>
> wrote:
> >
> > >
> > > In addition, I sincerely doubt that a RTTY station, for
> instance,
> > > will recognize the CW QRL request and reply in 30 seconds.
> > >
> > > >>>Most ops would quickly learn to recognize "QRL?" in CW.
> Replying
> > > requires nothing more than hitting a couple of keys, whether
on
> an
> > > KSR-33 or a keyboard.
> > >
> > > It would be much better if the automatic station could respond
> to a
> > > standard QRL signal during receive periods (wasn't it you that
> > > suggested that to me at some time in the past?).
> > >
> > > >>>Yes, I did; the two techniques are complementary.
> > >
> > > 73,
> > >
> > > Dave, AA6YQ
> > >
> >
>
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