Here I have a couple of questions during my project:
1, I am receiving “uU”(usrp underrun) when I am transmitting, it seems
that the data rate I feed to DAC is less than 128MS/s? I’ve already set
the maximum interpolation rate at 512. What’s the problem might be? I
guess the input data rate of usrp.sink_c is too low. If so, is there any
block plays the function of interpolator? If I have errors in my
reasoning or consumption, please point me out.
- Since the block : usrp.sink_c doesn’t have the parameter of Tx
frequency in its parameter list. Is that means I have to define a
function like set_freq() and call it? Is there anyway I could set a
fixed tx frequency in python without input that from the command line
option. I only have one daughterboard RFX2400.
Any suggestions and advice will be appreciated.