Re: [Discuss-gnuradio] About clock rate of USRP E100

[Matt Ettus]

As it is currently set up, there are only 2 clock rates.  The OMAP 
processor can run at up to 720 MHz.  This clock rate is independent of 
the FPGA, ADC, and DAC clocks.

The ADC clock can run as high as 64 MS/s.  The DAC always runs at 
exactly double the rate of the ADC.  The FPGA is normally running at the 
same speed as the ADC, but you could conceivably run at 2x or 1.5x if 
you want to go faster, or a number of speeds if you want to go slower.

We have not tried changing the FPGA/ADC/DAC clock during normal 
operation, but I don't think it would be worth the trouble to change it 
dynamically.

Matt


On 01/11/2011 12:38 PM, Miok Wah wrote:
> As far as I know, the decimation is after the ADC, so ADC rate doesn't change
> after changing the clock rate.  I'm happy to be corrected if it's not so. :)
>
>
>
> Alexander Chemeris wrote:
> > Hi,
> >
> > What about ADC/DAC clock rates?
> >
> >
> > --
> > Regards,
> > Alexander Chemeris.
> > http://www.fairwaves.ru
> >
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