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

[RADIO DOCTOR]

On Thu, 4 Oct 2007, Cowboy wrote:

> Because Mr. Small didn't know how to measure modulation accurately, 
> now a dedicated black box is required.
>
> I still fail to understand how this is "better" ?

Mr. Small knew how to measure FM very accurately and precisely.  And hee 
built a box that could measure according what to the rules were and he 
has a letter (I have a copy) from the FCC approving what he built the 
ModMinder to do.  The FCC has never required that no instaneous peaks 
exceed 100%.  They defined a peak as 10 cycles of a 10 kHz sinewave 
right in the rules.  One millsecond.  It is 'better' to ignore peaks 
that they don't recoginize as peaks if one wants to be as loud as 
possible, yet legal.  And such weighting is essential when transmitting 
high-speed digital SCAs.


...Lyle, FMeXtra evangelist, in Los Angeles, CA     Cell: 213-880-4690
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Lyle Henry, CPBE  THE RADIO DOCTOR  K9DKW/K7OO  Silver Lake/Los Angeles
  SCA Consultant, Contract Engr: Brazil, China, Mexico, Taiwan, SE Asia
                         323-660-4690 Office/Home
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