In article ,
Jim Nye wrote:
[big snip]

The Icom 746PRO contains such a circuit, which is separate from its
noise blanker function. Basically, the 746 samples slightly out of band
signals in order to determine the probable phase and amplitude of
coherent interference, and then it subtracts them from the in-band
signals. I believe that several of the Yaesu FT series transceivers can
do the same thing.

In any case, that's not the primary point of the post. The point is
that the ARRL has conveniently neglected the coherency property of BPL
leakage signals.

This is true of a carrier; however, this property you call "coherency"
will disappear to the extent that the interfering signal is modulated, and
will effectively vanish if the modulation rate is high enough.

So the ARRL is alarmist about this new brand of interfering signal,
because a special case of it (unmodulated) that will not appear in the
real world could be dealt with by new hardware that cost more than my last
car?

The most charitable thing I can say is that you & I have different takes
on the word "alarmist".


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R F Wieland Newark, DE 19711-5323 USA 39.68N 75.74W
Icom R75 Heathkit GR-81 Inverted-L in the attic
Reply to wieland at me dot udel dot edu