Re: [USRP-users] frequency shift of B210

[Marcus Müller via USRP-users]

Hi John,

the CC1120 is a cheap transceiver for GFSK. Unless you've driven it with
an oscillator that is way better than that of the B210, I don't really
see how your measurement could imply any clock drift on the B210's side?

Best regards,

Marcus


On 21.07.2017 10:41, john liu via USRP-users wrote:
> 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  > 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
>> mailto:mle...@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
>> mailto:johncorad1...@gmail.com>> wrote:
>>
>>> HI Marcus,
>>> internal　with  TCXO.
>>>
>>> On Thu, Jul 20, 2017 at 11:31 PM, Marcus D. Leech
>>> mailto:mle...@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
 >>> > 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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Re: [USRP-users] frequency shift of B210

[john liu via USRP-users]

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  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 
> 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  wrote:
>>
>> HI Marcus,
>> internal with  TCXO.
>>
>> On Thu, Jul 20, 2017 at 11:31 PM, Marcus D. Leech 
>> 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 
>>> 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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Re: [USRP-users] frequency shift of B210

[Marcus D. Leech via USRP-users]

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 > 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 mailto:johncorad1...@gmail.com>> wrote:


HI Marcus,
internal　with  TCXO.

On Thu, Jul 20, 2017 at 11:31 PM, Marcus D. Leech
mailto:mle...@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
mailto:johncorad1...@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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Re: [USRP-users] frequency shift of B210

[john liu via USRP-users]

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.

On Fri, Jul 21, 2017 at 9:37 AM, Marcus D. Leech  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  wrote:
>
> HI Marcus,
> internal with  TCXO.
>
> On Thu, Jul 20, 2017 at 11:31 PM, Marcus D. Leech 
> 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 
>> 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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Re: [USRP-users] frequency shift of B210

[Marcus D. Leech via USRP-users]

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  wrote:
> 
> HI Marcus,
> internal　with  TCXO.
> 
>> On Thu, Jul 20, 2017 at 11:31 PM, Marcus D. Leech  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  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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Re: [USRP-users] frequency shift of B210

[john liu via USRP-users]

HI Marcus,
internal with  TCXO.

On Thu, Jul 20, 2017 at 11:31 PM, Marcus D. Leech  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 
> 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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Re: [USRP-users] frequency shift of B210

[Marcus D. Leech via USRP-users]

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 > 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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Re: [USRP-users] frequency shift of B210

[john liu via USRP-users]

>
>
>
> What was your tuned frequency in this case?

Hi,Marcus,

It is 433.05Mhz

On Thu, Jul 20, 2017 at 11:46 AM, john liu  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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Re: [USRP-users] frequency shift of B210

[Marcus D. Leech via USRP-users]

On 07/19/2017 11:46 PM, john liu via USRP-users 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


What was your tuned frequency in this case?



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