[BC] Outside source for checking Modulation Levels

[Dana Puopolo]

Besides, with IBOC you are allowed to interfere with your adjacent channel
neighbor - because it *occupies* their bandwidth!  I have an Inovonics tunable
modulation monitor with a 5 element yagi atop a 190 foot monopole, which
receives the Philly stations quite well - and one group (near as I can tell),
is modulating all their stations to at least 115% - and apparently has been
doing so for years. It's unfair, because the other stations all look legal -
and this groups' FM stations have at least 2 db on everyone.

They get away with it because no one cares.

PS: Eric pulled the same crap with his composite clipper. He created a scare
that the FCC was going to start running around and citing everyone because
their 19 kHz piolot tone  modulation might drop to 7.9% about twice an hour.
Guess what? The PLL stereo demodulator (commonplace in every FM stereo
receiver made since 1974 - see MC1310 and LM1800) works fine with pilot levels
as low as 5% and the only reason they drop out after that was by design (there
is a pilot threshold circuit built into them) - they could go to 1% or lower
if designed to.

Besides, I've never heard of any station even being cited for running their
pilot level below 8%

-D

From: Cowboy <curt at cwf1.com>

> Personally I have always thought that occupied bandwidth measurement better
suits the purpose.