[USRP-users] frequency shift of B210

john liu johncorad1988 at gmail.com
Fri Jul 21 04:41:41 EDT 2017


Hi,Marcus,
We calculated this.
The B210 not only generate a GFSK signal,but also received the signal from
CC1120.The CC1120 and B210 both work in full duplex mode.
Hi qi,
Can you describe your test method?I am not clear for that.

best regards
John


On Fri, Jul 21, 2017 at 10:47 AM, Marcus D. Leech <mleech at ripnet.com> wrote:

> 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>
> 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> wrote:
>>
>> HI Marcus,
>> internal with  TCXO.
>>
>> On Thu, Jul 20, 2017 at 11:31 PM, Marcus D. Leech <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>
>>> 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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