Re: [Discuss-gnuradio] Minimum value for center frequency step size

[Eric Blossom]

On Tue, Mar 10, 2009 at 05:33:36AM +0100, Karim El Defrawy wrote:
> Hi,
> I am using a FLEX2400 transceiver daughterboard and was wondering what's  
> the minimum step size that I can use to set the center frequency.
>
> I tried steps down to 500KHz and I could tell the difference between the  
> generated carrier frequency of a sine wave on an oscilloscope.
>
> When I tried lower steps I was not able to see any difference in the  
> generated frequency.
> Thanks,
> Karim

Which interface are you using to set the center frequency?

If you use the "tune" method, it adjusts both the VCO on the
daughterboard and the digital up/down converter giving a minimum step
size of about 0.01 Hz.

Eric