Re: [Discuss-gnuradio] Clock rate change on x300

Oh I see.  Does that mean that I can use GNU Radio to change it?  If not, I'll ask the USRP guys as you suggested.

 

 

Paul Mitchell

Engineering Technician IV

paul.mitchell@testllc.com

256.716.9056 (Work)

256.289.3581 (Cell)

 

From: Marcus Müller
Sent: Wednesday, August 7, 2019 9:27 AM
To: Mitchell, Paul; Derek Kozel; discuss-gnuradio@gnu.org
Cc: usrp-users
Subject: Re: [Discuss-gnuradio] Clock rate change on x300

 

Dear Paul,

I'd recommend taking this to the USRP-users mailing list (in CC), since
it's not really GNU Radio-related.

Since that clock rate setting doesn't really "exist" until the device
is operating, you can't query that from any program than the program
currently using the USRP (but that program would know, anyway, because
it either set the master clock rate to 184.32 MHz or it left it at 200
MHz).

Best regards,
Marcus

On Wed, 2019-08-07 at 14:18 +0000, Mitchell, Paul wrote:
> I'm fine using one of the supported rates.  That's totally fine.  I
> would just like to know how to check the clock rate and swap between
> the two for experimentation purposes.  Is there a terminal string I
> can run in Linux to do this?
> 
> 
> Paul Mitchell
> Engineering Technician IV
> paul.mitchell@testllc.com
> 256.716.9056 (Work)
> 256.289.3581 (Cell)
> 
> From: Derek Kozel
> Sent: Tuesday, August 6, 2019 1:56 PM
> To: discuss-gnuradio@gnu.org
> Subject: Re: [Discuss-gnuradio] Clock rate change on x300
> 
> Hi Paul,
>
> What rate do you want to adjust it to and for what purpose? The X300
> supports a master clock rate of 200 MS/s and 184.32 MS/s. The built
> in
> DSP can convert to an integer divisor sample rate of one of those
> two.
> Adding support for another rate would require either a lot of
> software
> work or implementing a rational resampler in the FPGA in which case
> you
> would need a Vivado license.
>
> https://files.ettus.com/manual/page_usrp_x3x0.html
>
> Regards,
> Derek
>
> On 06/08/2019 19:09, Mitchell, Paul wrote:
> > I need to adjust the clock rate on a USRP x300. Is there a simple
> way to do this or do I need to use Vivado to access the FPGA image
> somehow? I am using Linux for everything.
> >
> > Paul Mitchell
> > Engineering Technician IV
> > paul.mitchell@testllc.com
> > 256.716.9056 (Work)
> > 256.289.3581 (Cell)
> > _______________________________________________
> > Discuss-gnuradio mailing list
> > Discuss-gnuradio@gnu.org
> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>
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