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

Marcus Müller marcus.mueller at ettus.com
Thu Apr 2 17:51:07 EDT 2015


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
> <mailto: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
>> <mailto:usrp-users at lists.ettus.com>>;
>> *Date: * Apr 3, 2015
>> *To: * "Martin Braun"<martin.braun at ettus.com
>> <mailto:martin.braun at ettus.com>>;
>> *Cc: * "usrp-users"<usrp-users at lists.ettus.com
>> <mailto: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 <mailto: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
>> >
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>>
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>
>
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