"Bob Radil" wrote in message
...

Yeah, but Riverside is in KTNQ's null - where their day pattern has the
equivalent of about 6kW, NOT 50kW. The KTNQ day pattern runs 6kW or less
over most of the ESE quadrant. They have far less toward Riverside at
night.
And Riverside is in the max of 1050's day pattern.

Presumably the 1020 IBOC pattern is proportional to the main signal's
pattern.


I wouldn't presume that. Most ATUs and phasors are designed for the
carrier
frequency. The fact that a transmitter may also transmit audio sidebands
is a
secondary issue. IBOC splatter was certainly not taken into consideration
in
the design of nearly, if not all, of the phasors in use today.

The KTNQ phaser and ATUs were carefully, and at great cost, redesigned for
IBOC.

Your observation is correct for most stations, however.