[Discuss-gnuradio] Problem with USRP used for digital beacon reciever

[Wipat phonsukkarn]

Thank you so much again Josh
So Josh could you give me some opinion
That if my input signal pass through the USRP is about cos(wt+phi) after it passed through the mixer by NCO that generate sinwt and coswt  and met with the cic filter inside the usrp

what my professor expect is the output that go out of the usrp must be the constant value cosphi and sinphi so if we connect to usrp with the scope sink, what we would see is the DC graph of the cosphi and sinphi values  but what we notice for real was the scope showed the graph that seems to have cycles.So what do you think?
but if what i aspect is wrong . SO how can i find the PHI of the input signal?

Thank you very very much for yours advice
Wipat

sorry for my english too.