Re: [Discuss-gnuradio] USRP problem ? used for Digital beacon receiver

[Josh Blum]

> 1. How do everybody set MUX? I tried to read the datasheet but It
> wasn't make sense for me.So what I do is use the GRC and used the Usrp
> block so i know that my db BasicRx is on side B RXA and My WBX is on
> Side A Rx2 but if i want to set mux in the python program how do i do?

This is the code for the grc usrp* blocks:
You can see how its set in <gnuradio_repo>/grc/grc_gnuradio/usrp/*.py

> 2. I tried to find the signal's phase,so i  generated the signal
>   about 1.5M from signal generator (just for test) directly to the Basic
> Rx Db. So what i expect is the IQ signal that show in the GRC Scope sink
>   would be the constant(cosphi and sinphi) signal but It's not ,the
> signal seem to be like the cycle(period). What do I misunderstanding?

What frequency did you tune the basic RX? Perhaps you are seeing an 
offset between signal generator and DDC. Do the tones the FFT sink look 
to be in the correct positions?

-Josh