Frank Dresser wrote:
That spectrum is consistant with what I heard a few evenings ago around
720 kHz. WGN's engineer said it wasn't them, and I haven't noticed the
noise since then.

Has anyone heard the sidebands produced by IBOC? The best description I
can come up with is something like "digital white noise".

It's just a noise rush, but not white exactly. The giveaway is that it's on
only one sideband of the station you're trying to hear. If you hear it on the
LSB, the offending IBOC station is 10 kHz higher (not lower as you'd expect);
and if on USB, then 10 kHz lower.

So you need selectable sidebands to tell, or at least a BFO and notice whether
the noise pitch goes up as you tune up (in which case the IBOC station is higher)
or goes down (in which case the IBOC station is lower), starting from the
interfered-with station.
--
Ron Hardin


On the internet, nobody knows you're a jerk.