[USRP-users] frequency shift of B210

Marcus D. Leech mleech at ripnet.com
Thu Jul 20 22:47:59 EDT 2017


On 07/20/2017 10:08 PM, john liu wrote:
> i am sorry.
> We generate a GFSK signal with B210 and  received the signal with 
> multiple cc1120.When frequency shift occurred,the cc1120 can not 
> received the signal.
> Also, another b210 has been running for several days without such a 
> jump phenomenon.
So, sorry to be a bother, but, where did the 3.2kHz frequency shift 
measurement come from?   The CC1120 is just a GFSK demodulating digital 
receiver.


>
> On Fri, Jul 21, 2017 at 9:37 AM, Marcus D. Leech <mleech at ripnet.com 
> <mailto:mleech at ripnet.com>> wrote:
>
>     No i mean what were you measuring?
>
>     Were you using an external signal generator and what were its specs?
>
>
>     Sent from my iPhone
>
>     On Jul 20, 2017, at 9:09 PM, john liu <johncorad1988 at gmail.com
>     <mailto:johncorad1988 at gmail.com>> wrote:
>
>>     HI Marcus,
>>     internal with  TCXO.
>>
>>     On Thu, Jul 20, 2017 at 11:31 PM, Marcus D. Leech
>>     <mleech at ripnet.com <mailto:mleech at ripnet.com>> wrote:
>>
>>         On 07/20/2017 02:22 AM, john liu wrote:
>>>
>>>
>>>
>>>         What was your tuned frequency in this case?
>>>
>>>         Hi,Marcus,
>>>
>>>         It is 433.05Mhz
>>         That's about 7PPM.
>>
>>         What was your signal source?
>>
>>
>>>
>>>         On Thu, Jul 20, 2017 at 11:46 AM, john liu
>>>         <johncorad1988 at gmail.com <mailto:johncorad1988 at gmail.com>>
>>>         wrote:
>>>
>>>             Hi all,
>>>             We used B210 with TCXO,and run about 2 hours , a 3.2K
>>>             frequency shift occurred when the temperature did not
>>>             change significantly.Is it a normal?
>>>             How can we improve this situation?
>>>
>>>             thank you.
>>>             best regards
>>>             John
>>>
>>>
>>
>>
>

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