[BC] AM Stereo On A Mono Radio-FM Loudness

[Dana Puopolo]

The irony is that Harrison Klein used occupied bandwidth measurements to
convince the FCC to allow increased modulation while running SCAs, yet even
THEY don't use it themselves!

Go figure!

-D

------ Original Message ------
Received: Wed, 03 Oct 2007 02:14:03 PM EDT
From: Tom Bosscher <tom at bosscher.org>
To: "Broadcasters' Mailing List" <broadcast at radiolists.net>
Subject: Re: [BC] AM Stereo On A Mono Radio-FM Loudness

	Either occupied bandwidth or calibrated discriminator 
oscope readings always lead to an error of innocence, and 
that is in the case of those of us who run 2 SCA's and RDS, 
and get to have 110% modulation, or 82.5 KHz deviation. 
There are many engineers out there who do grab this concept.

	tom bosscher, filling in the spectrum

Dana Puopolo wrote:
> Interesting.
> At the NAB a few years ago, I was shown by the FCC how they measured it
there.
> They took a lab grade FM tuner and connected it to an oscilloscope that was
> calibrated to the tuner for 100% modulation at their lab. After adjusting
the
> directional antenna to eliminate multipath, they looked at the modulation
> peaks on the calibrated 'scope. Too many and you got a pink slip. That sure
> DOESN'T sound like using occupied bandwidth to me!
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