Chen,
Remember this crucial point:
The only thing restricting BW today is the general unavailability of radios with
SSB bandwidths greater than the average of 2.45 kHz BW.
PACTOR3 was designed to use 2.2 kHz EXACTLY because wider would not fit in
today's radios. That will change as SDR becomes more and more available, so:
*We do need a BW limit*,
The question reduces to what that BW should be, noting that 2.2 kHz accommodates
all current users, and excludes no one (FCC "in the public interest" ruling).
Pick a number between 2.2 and 2.8 kHz,
argue for the number by providing evidence that anything higher than your number
causes grievous harm to current user.
That's where I got stuck!
73,
Kai, KE4PT
On 11/26/2013 7:03 PM, Kok Chen wrote:
ARRL has already amended their filing (thanks, Andy).
http://apps.fcc.gov/ecfs/comment/view?id=6017478079
It has removed the encryption clause that was put into 97.307(f)(3) in the
original petition.
So, we can just focus on the remaining part of 97.307(f)(3) now:
i.e.,
(1) removal of symbol rate
and
(2) the 2,8 kHz bandwidth.
73
Chen, W7AY
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