You can! If you're using GRC to design your GNU Radio system, it's the "Clock Rate" property of the UHD USRP Source / Sink blocks; if you're directly coding, you want to call set_clock_rate() before doing anything else, or supplying "master_clock_rate=184.32e6" with your device address.
Best regards, Marcus On Wed, 2019-08-07 at 14:30 +0000, Mitchell, Paul wrote: > 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.mitch...@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.mitch...@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.mitch...@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 > > > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > _______________________________________________ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio