Hi Marcus, Thank you for your help.
2018-03-08 10:37 GMT+08:00 Marcus D. Leech via USRP-users < usrp-users@lists.ettus.com>: > On 03/07/2018 08:07 PM, liu Jong via USRP-users wrote: > > Hi all, > Do you give us some advice? > thank you. > > best regards > Jon > > This is pretty-much what electronics *DOES*. > > There will be harmonics of the master clock at some level, and only 5dB > above the noise is actually really good. > > Unless each compartment of a modern radio is in its own EMI-isolated > package, there will be some radiation of clock signals. > It's inevitable, so, you choose your master clock to not coincide with > any of desired signal frequencies, wherever possible, and if > not you have a "map" of frequencies that are likely to contain low-level > harmonics of clocks inside the electronics. > > ANY wide-band modern receiver has this problem. But for many > single-purpose applications, clock choices are made to avoid it > being a problem or, if the harmonics are low (like only +5dB above the > noise), simply ignored. > > > 2018-03-06 11:48 GMT+08:00 liu Jong <jongliu1...@gmail.com>: > >> Hi all, >> We test it with matlan2017b.But we don't think it does with softwere. >> >> best regards >> Jon >> >> 2018-03-05 10:29 GMT+08:00 liu Jong <jongliu1...@gmail.com>: >> >>> Hi all, >>> Any suggestion is welcome. >>> >>> 2018-03-02 14:21 GMT+08:00 liu Jong <jongliu1...@gmail.com>: >>> >>>> Hi all, >>>> When we set "master_clock_rate=25.6M" for Receiving and we found >>>> that there is a Single frequency interference in >>>> 76.8M(25.6X3),102.4M(25.6X4),153.6M and so on until above 1.5G.We >>>> changed the "master_clock_rate=16M",and we also found that there is a >>>> Single frequency interference in 80M(16X5),96M(16X6)and so on.The signal >>>> power is larger than noise about 5db.Is it the problem of the chip or the >>>> problem of USRP E310? >>>> thank you >>>> best regards >>>> Jon >>>> >>> >>> >> > > > _______________________________________________ > USRP-users mailing > listUSRP-users@lists.ettus.comhttp://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 > >
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