Re: [Discuss-gnuradio] pll_refout_cc - finding optimum alpha & beta ??

[Eric Blossom]

On Fri, Mar 17, 2006 at 10:48:24AM -0800, Matt Ettus wrote:
> 
> > It just seeemd strange to me that a very large number, d_freq, which is
> > bounds limited to between d_min_freq and d_max_freq, is inside a
> > function trying to limit it's output to between +PI and -PI.
> > 
> > if(100e3 > M_PI)
> >   return(100e3-M_TWOPI) 
> > 
> > or 99993.7168...   error can get close to zero, but frequency will
> > never be less than d_freq_min.
>
> 
> d_freq is not in Hz.  It needs to be in radians per sample, which should
> always be less than PI.

That clears it up.  Thanks!

Eric