[BC] FM Stereo invention

[Robert Meuser]

The pilot is theoretically not required. The Russian system dispensed 
with it. A reduced 38 kHz carrier would have been possible and would 
have had the same or less modulation penalty as a pilot. A variant of a 
costas loop could have also recovered the 38 kHz.

R


Jim Tonne wrote:

>
> Willie wrote:
>
>> The interesting thing is that both of these methods generate 
>> virtually the
>> same result!
>
>
> They generate EXACTLY the same result!
>
> One of them used a 38 kHz switching rate and the other used 40 kHz
> but method-wise they produced the same output.  I understand the FCC
> chose the one using 38 kHz because it was somewhat more spectrally
> efficient.
>
> And while I am at it, the "pilot" is nothing but a synch signal for the
> demodulator.
>
> - JimT
>
>
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