> > Until such time as all unattended, automatic protocols are
> > "smart" enough to recognize that a frequency is in use and
> > delay transmission until the frequency is clear for a reasonable
> > length of time, they have no business occupying ANY amateur
> > spectrum, let alone asking for MORE.
Amen! This standard should be applied to ANY unattended station,
including those "semi-automatic" robots that supposedly respond
only to calls from attended stations.
A "listen before transmit" protocol should lockout transmission if
any coherent (e.g., non-noise) signal is detected in a "window" at
at least +/- 1 KHz from the center of transmitted signal (or twice
the maximum acceptable bandwidth for the frequency in use if/when
"regulation by bandwidth" is adopted). The software should be
required to look for all documented digital modes used in amateur
service and not just its "own mode."
73,
... Joe, W4TV
> -----Original Message-----
> From: rtty-bounces@contesting.com
> [mailto:rtty-bounces@contesting.com] On Behalf Of George Henry
> Sent: Saturday, October 20, 2007 12:10 AM
> To: rtty@contesting.com
> Subject: [RTTY] Fw: [illinoisdigitalham] Re:We Need to Expand
> HF Auto SubBands Now
>
>
> BTW, this was my response:
>
>
> ----- Original Message -----
> From: "George Henry" <ka3hsw@earthlink.net>
> To: <illinoisdigitalham@yahoogroups.com>
> Sent: Thursday, October 18, 2007 12:57 PM
> Subject: Re: [illinoisdigitalham] Re:We Need to Expand HF
> Auto Sub Bands Now
>
>
> > Until such time as all unattended, automatic protocols are
> "smart" enough
> > to recognize that a frequency is in use and delay
> transmission until the
> > frequency is clear for a reasonable length of time, they
> have no business
> > occupying ANY amateur spectrum, let alone asking for MORE.
> >
> > Attended stations are required to make sure that a
> frequency is not in use
> > before transmitting: unattended stations should be
> required to do the
> > same.
> >
> >
>
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>
>
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