But what is interference?
If none is reported, none is caused.
Good point.
As we say in German:
"Wo kein Kläger,da kein Richter"
(Transl.: There is no judge, without a complainant.)
73
Clemens
DL4RAJ
----- Original Message -----
From: Andy Talbot
To: [email protected]
Sent: Wednesday, February 15, 2012 10:45 PM
Subject: Re: LF: Re: WRC-12 Approves the New 472-479 kHz Amateur Radio
Allocation
But what is interference?
If none is reported, none is caused.
And who is going to report interference to a service no one uses
'Andy
www.g4jnt.com
On 15 February 2012 21:40, Clemens Paul <[email protected]> wrote:
Greetings all,
I wonder what "secondary user on non-interference basis" means in
practice.
As we know most NDBs are AM modulated with about 1kHz.
Now it would be interesting to know what selectivity/bandwidth DF
receivers
for NDBs in aeroplanes might have.
Imagine they have 1kHz or even 2kHz (quite possible).
For non interfering such a receiver one would have to stay well
without that
BW.
Hence with a few NDBs spread between 422 and 479kHz there would
virtually remain no usable frequency for us amateurs if we wanted to
make
100% sure not to interfere any aeroplanes' beacon reception.
73
Clemens
DL4RAJ
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