Re: [Discuss-gnuradio] Tuning <50kHz steps with TVRX?

[Matt Ettus]

John Ackermann N8UR wrote:
> I made some real progress today and have both WFM and NBFM working on my
> primary computer.
> 
> In looking at the tvrx_nbfm_rcv_gui program, there's a note that the
> smallest tuning step is 50kHz; I presume this is a limitation of the
> tuner module.  I'm sure there must be a way to get smaller tuning steps
> by moving the center frequency at baseband.  Any suggestions how to
> accomplish that?

Basically, you tell the daughterboard the freq you want.  It returns the
frequency it gave you.  You set the DDC in the USRP to the negatve of
the difference frequency.


Check out the wbfm code for an example.