[RTTY] Will You Let FCC Kill PACTOR3?

[Neal Campbell]

As they say in France
D'accord.

I am in favor of the resolution.

Neal

On Dec 27, 2007 6:23 PM, Kok Chen <chen at mac.com> wrote:
>
> On Dec 27, 2007, at 8:58 AM, WS7I wrote:
> >> RM-11392
>
> For details, go to
>
> http://www.southgatearc.org/news/december2007/bandwidth_band_plan.htm
>
> where you can find links to the pdfs of the original RM.
>
> The following are my impressions.
>
> RM-11392 proposes that the FCC go back to use the old definition of
> allowable bandwidths for 12m through 80m ham bands so that RTTY and
> Data modes are limited to a bandwidth of 1500 Hz.
>
> 1500 Hz is plenty of bandwidth.  Among the digital modes in use
> today, RTTY uses about 215 Hz, MFSK16 uses 316 Hz.  MT63 and Olivia
> uses up to 1000 Hz.  All of which would easily fit within the
> proposed limit of 1500 Hz.  There is a 2000 Hz variant of Olivia
> which I am not sure is often used.
>
> The only currently used digital mode that occupies more than 1500 kHz
> is the higher data rate steps of Pactor III (Pactor III keeps
> increasing bandwidths if the path allows it to, up to about 2200 Hz).
>
> The RM also asks for clarification of what an automatically
> controlled station is, and limiting them to above 14.095 MHz on 20m,
> for example.
>
> RM-11392 pretty much attempts to keep Pactor III in particular, and
> automatic stations in general, from interfering with keyboard digital
> modes.  Just MHO, of course.
>
> 73
> Chen, W7AY
>
>
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