Re: [Discuss-gnuradio] Still confused about the IF frequency

[Sachi]

Hi, Rick

Would you please iterate more about why it's not a
problem for analog signal? Maybe some mathematics
would be very helpful to me.  My understanding is if
the spectrum is reversed, the signal shouldn't be the
same.

Thanks

Sachi
--- Rick Parrish <address@hidden> wrote:

> Sachi wrote:
> 
> >Since we had to do that "reflection", the spectrum
> is reversed.  This isn't a problem for FM, but needs
> to be taken into account for most modulations.
> >  
> >
> For analog audio, no it's not a problem but for
> other modes - like FSK 
> or PSK modulated data, it would (unless I've
> completely misunderstood) 
> invert the signal and therefore the data (but not
> for FFSK or other NRZ 
> modes).
> 
> -rick
> 
> 



                
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