Re: [Discuss-gnuradio] available sample rates for USRP2

[Josh Blum]

On 10/25/2011 06:18 PM, Kyle Zhou wrote:
> When I use uhd_fft.py -s 8M -f ..
> 
> It reported that 
> 
> UHD Warning:
> 
>     The hardware does not support the requested RX sample rate:
> 
>     Target sample rate: 8.000000 MSps
> 
>     Actual sample rate: 7.692308 MSps
> 
>  
> 
> I am wondering how the actual rate 7.692308M is determined? 
> 
> Is there any formula that I can use to ascertain that a given sample rate is
> available on USRP2?
> 

Only integer divisor rates of the master clock is possible. In this case
100Mhz/decimation = sample rate.

Querying the possible sample rates will be part of my next API revision.

-Josh