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

[Mark Humphrey]

I also wonder if this could be interpreted to exclude the 19 kHz
stereo pilot from measurement.

Consider that the pilot is added to the other components of a
composite waveform, and the period of each cycle is less than 1
millisecond.  If total modulation is set to 110% with a pilot
injection of 10% and you examine the instantaneous deviation of the
carrier on a scope, you'll see that the pilot "fuzz" (with these very
short peaks) is responsible for the portion of the waveform above
100%, unless the pilot is being clipped.  Should we count them?

I personally favor the occupied bandwidth approach, but it's more even
difficult to measure and interpret.

Mark


On 10/5/07, Cowboy <curt at spam-o-matic.net> wrote:
>
>
>  Here's my problem with this approach.
>  The rules always had the qualifier "peaks of frequent recurrence" which
>  always seemed reasonable, and more than adequate to me.
>  Now, we need to know how many picoseconds a peak is, for it to be a peak,
>  or not a peak, and if a peak overlaps the window by a picosecond, does it
>  still count/not count ?
>  And, it sorta depends on what the meaning of "is" is.
>
>  It's a bad thing ( IMHO ) to try and codify good judgment.
>
>