Basic RX daughterboard: DC bias

GNU Radio
1

Hi,

When I run the basic RX daughterboard with no input cable attached,
usrp_fft reports a signal at 0 Hz (which I assume to be some kind of DC
bias created within the USRP or daughterboard). How can I remove this?

Thanks,

Chris

2

Chris S. wrote:

Hi,

When I run the basic RX daughterboard with no input cable attached,
usrp_fft reports a signal at 0 Hz (which I assume to be some kind of
DC bias created within the USRP or daughterboard). How can I remove
this?

Take a long term average of the signal and subtract it from the signal.

Matt