In article ,
"Brenda Ann Dyer" wrote:

"RFCOMMSYS" wrote in message
...
Will BPL be prohibited at LW and MW frequencies? If so, can
sub-harmonics
still
QRM those bands?


No such things as subharmonics. The fundamental cannot produce
frequencies lower than itself. However, who knows what strange QRM
the modems themselves will produce..

Yes that is true that the fundamental by itself will not produce
harmonics of lower frequency but the fundamental is being modulated by
data so mixed products of variable data transmitted mixing with the
carrier will produce frequency energy above and below the fundamental.
If you have long strings of ones or zeros the mixed frequencies will be
as low as the inverse of the period of low frequency data rates.

--
Telamon
Ventura, California