I agree there should be thought given to bandplanning. Where, for
instance, should I set my QRSS receiver?
However, the band is 7kHz
wide and the suggestion to "go 1k up may
be , 473 dial to give room for cw
etc" would in fact give just 2.2kHz
of the band for what will presumably be
the most popular mode.
Currently the two modes of the 500kHz version of
Opera occupies from
1.2kHz to 1.8kHz above dial frequency.
I think we
need first to look at how much each mode might occupy. A
useful division
might be 3.8kHz for CW, 0.2Hz for QRSS (perhaps in
two wide-spaced
sub-bands) and 3kHz for all "data" (machine-read
modes including Opera).
There is an argument that any mode involving
beacons (including some uses of
QRSS and Opera) should be widely
separated from two-way QSOs.
Lower
bandwidth modes should be nearer the band edge. Perhaps 'DX'
modes should
avoid the active NDB frequencies - say between 476 and
478kHz.
Currently, it seems that Opera had a dial frequency of
500kHz, and
the 1.2kHz below it has some QRSS activity (eg IQ2MI). That sort
of
arrangement may work on 472kHz provided the Opera allocaton does not
eventually migrate as it did on 137kHz.
Perhaps in the short term
there should be allocated (or at least
agreed) frequencies with an
understanding by all that there will need
to be adjustments
eventually.
All food for thought.
Mike,
G3XDV
===========
> Well , could set the lower band edge frequency
, that fits in with
> using USB, puts signal 1.4Khz inside the band .. or
do we need to go
> 1k up may be , 473 dial to give room for cw etc
?
>
> G.
>
> --- In [email protected],
Rik Strobbe <rik.strobbe@...>
> wrote: > > Either the upper or
lower band end ? > > > > 73, Rik ON7YD
> - OR7T > > >
> ________________________________ > Van:
> [email protected]
[[email protected]]
>
namens graham787 [g0nbd@...] > Verzonden: vrijdag 15 juni 2012 2:13
>
> Aan: [email protected]
> Onderwerp: [rsgb_lf_group] New
> Opera QRG for 472 Khz Band ? >
> > > New QRG for 472 Khz Band > >
> Suggestions needed for
a QRG for the new 472 KHz band > Dial set USB
> frequency , taking into
account other band users ! > > Tnx - G >
>
>
>
