On Wed, 2016-12-07 at 12:10 -0500, Andy Walls wrote:

> > From GDB I can see
> > 
> > 
> > d_filtnum = 0
> > count = -67108696
> > d_out_idx = 0
> > 
> 
> This is a garbage-in, garbage-out problem I've seen exactly before with
> other blocks and the PFB clock sync block.
> 
> 1. Check to make sure that your filter taps don't trace out a function
> that has discontinuities or flat spots (i.e. a square pulse), and the
> PFB clock sync algorithms can't handle that.

typo:  ... *as* the PFB clock sync algorithms can't handle that.

> 2. Add a tag_debug block before the PFB clock_sync and look for time_est
> tags with values outside the range [0.0, 1.0).
> 
> -Andy



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