[USRP-users] Could this be Ettus X310 self jamming problem?

Trek trek830 at qq.com
Sun Apr 5 12:06:13 EDT 2015


thanks, is there a formula to calculate all the possible master clock rate? 
thanks, 




------------------ Original ------------------
From:  "Marcus Müller via USRP-users";<usrp-users at lists.ettus.com>;
Date:  Apr 3, 2015
To:  "usrp-users"<usrp-users at lists.ettus.com>; 

Subject:  Re: [USRP-users] Could this be Ettus X310 self jamming problem?



                   If that solves your problem: 184.32MHz is the third legal master     clock rate.
     
     
     On 04/02/2015 11:44 PM, Trek via       USRP-users wrote:
     
            cool, setting this to 120MHz indeed solved my problem at         1600MHz, however it created another clock harmonic at 1560MHz         (1560=120*13), which is also my point of interest on the         spectrum, is there another odd clock frequency you guys could         recommend for me to work with? 
       
       
       thanks, 
                
         
         
         
         ------------------ Original ------------------
                    From:  "Marcus Müller via             USRP-users";<ianb at ionconcepts.com>;
           Date:  Apr 3, 2015
           To:  "Trek"<trek830 at qq.com>; 
           Cc:  ""Marcus Müller via             USRP-users"<martin.braun at ettus.com>; ""Marcus Müller             via USRP-users"<usrp-users at lists.ettus.com>; 
           Subject:  Re: Could this be Ettus X310 self             jamming problem? 
         
         
         
         Try adding  "master_clock_rate=120e6"  (including quotes) to the         Device Arguments field in the UHD Sink.         -Ian
                        On Apr 2, 2015, at 2:13 PM, Trek <trek830 at qq.com>               wrote:
             
                            In terms of GRC, how could I adjust master_clock_rate                 to 120MHz? Is there a setting in the USRP source                 properties? 
               thanks, 
                                
                 
                 
                 
                 ------------------                   Original ------------------
                                    From:  "Marcus Müller via                     USRP-users";<usrp-users at lists.ettus.com>;
                   Date:  Apr 3, 2015
                   To:  "Martin Braun"<martin.braun at ettus.com>;                     
                   Cc:  "usrp-users"<usrp-users at lists.ettus.com>;                     
                   Subject:  Re: [USRP-users]回复: Could this                     be Ettus X310 self jamming problem?
                 
                 
                 
                 Try repeating your test with a master_clock_rate of                 120MHz rather than 200MHz. This should change the                 frequencies of harmonics related to the default radio                 clock.
                 -Ian
                 
                 On Apr 2, 2015, at 1:42 PM, Martin Braun via USRP-users                 <usrp-users at lists.ettus.com>                 wrote:
                 
                 > On 02.04.2015 07:16, Trek via USRP-users wrote:
                 >> I already did it at 1.602GHz instead of 1.6GHz,                 same thing except now
                 >> the large spike is -2MHz from 0.
                 > 
                 > This could be a clock harmonic. At 1650 MHz, do you                 still see something?
                 > 
                 > M
                 > 
                 > _______________________________________________
                 > USRP-users mailing list
                 > USRP-users at lists.ettus.com
                 > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
                 
                 
                 _______________________________________________
                 USRP-users mailing list
                 USRP-users at lists.ettus.com
 http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
                        
           
         
       
       
              
       _______________________________________________ USRP-users mailing list USRP-users at lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/attachments/20150406/6699a82c/attachment-0002.html>


More information about the USRP-users mailing list