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 <mle...@ripnet.com > <mailto:mle...@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 >> <mle...@ripnet.com <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 >> <johncorad1...@gmail.com <mailto:johncorad1...@gmail.com>> wrote: >> >>> HI Marcus, >>> internal with TCXO. >>> >>> On Thu, Jul 20, 2017 at 11:31 PM, Marcus D. Leech >>> <mle...@ripnet.com <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 >>>> <johncorad1...@gmail.com >>>> <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 >>>> >>>> >>> >>> >> > > > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
_______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
