[casper] fft overflow in tut4 and more questions

[Mandana Amiri]

Hi everyone,

I download poco (tut4) on my Roach board and supply -10dbm 250MHz 
signals and when I read back the value of the status register, I have x 
000f0f00, which means fft_over and eq_clip are set. I tried changing the 
quant0_gain, etc values hoping that eq_clip would be cleared, but it did 
not not change.

Could someone please explain the fft_over and eq_clip functionality and 
whether I need to worry about fft_over.

My next question is what is the dip that I see in the middle of the 
auto- and cross-correlation plots, regardless of signals applied or just 
terminated inputs.

Thanks,
Mandana