--- In [email protected], "Erik Platteeuw" <[EMAIL PROTECTED]> wrote:
>
> Good introduction on quadrature modulation but two typing errors in
> the formulas:
> 
> cos(x)cos(y)=1/2[cos(x+y)]+1/2[cos(x-y)]
> and
> sin(x)sin(y)=1/2[cos(x-y)]-1/2[cos(x+y)]
> 
> Thank you Alberto
> 
> Erik, ON4LP

  Erik,

   quite right, thanks for spotting those errors. I have just
corrected the original PDF file, and have re-uploaded it in the Files
section of this group, in the I2PHD folder.

73  Alberto  I2PHD


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