"Ron Hardin" wrote in message
...

It's not symmetric around the adjacent channel station being
interfered with.


OK. The noise was symmetrical around 720, and I was trying to catch
710.


If IBOC is on 700 and you're listening to 710, the the IBOC noise is
at 713,
which is the upper sideband of 710. If you listen to 710 LSB, the
noise
disappears.
--
Ron Hardin



I live a few miles from WGN's transmitter, and the normal sideband
splatter makes WOR almost unlistenable. I was just curious about
propagation that night. A station ID was all I wanted. If I ever hear
the noise again, I'll listen to it more carefully.

Frank Dresser