Re: [USRP-users] frequency shift of B210

2017-07-21 Thread 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 wr

Re: [USRP-users] frequency shift of B210

2017-07-21 Thread 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. Leec

Re: [USRP-users] frequency shift of B210

2017-07-20 Thread 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, s

Re: [USRP-users] frequency shift of B210

2017-07-20 Thread 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

Re: [USRP-users] frequency shift of B210

2017-07-20 Thread 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

Re: [USRP-users] frequency shift of B210

2017-07-20 Thread 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

Re: [USRP-users] frequency shift of B210

2017-07-20 Thread 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,an

Re: [USRP-users] frequency shift of B210

2017-07-19 Thread 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

Re: [USRP-users] frequency shift of B210

2017-07-19 Thread 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

[USRP-users] frequency shift of B210

2017-07-19 Thread john liu via USRP-users
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 ___ USRP-users mailing list USRP-user