Great thanks Marcus, will try cleanup the input. Would is still work with 2 Vpp AC coupled input?
On Mon, Apr 2, 2018 at 9:33 AM Marcus D. Leech via USRP-users < [email protected]> wrote: > On 04/02/2018 12:17 PM, Sailor Jerry via USRP-users wrote: > > I'm using the external 10 MHz input to my B210 and getting the following > lock status messages: > > Waiting for "lo_locked": ++++++++++++++++++++ locked. > Waiting for "ref_locked": _+____+____+____+___++ > > Here is the waveform of my 10 MHz clock > ( I tried both AC coupled (yellow) and DC coupled (blue) ) the results are > the same. > > [image: ac-coupled.png] > > Any hint what makes B210 unhappy will be greatly appreciated. > > What is the difference between LO lock status and REF lock status? > > > The LO is the local oscillator on the synthesizer. Since the board has an > always-on master clock that is *steered* by the external reference, I would > expect > that even with a flaky reference clock, the synthesizer would be able to > lock. > > Your waveform looks rather "dirty", and it's at a level of only 1.1V or > so? The B210 can tolerate up to 3.3V on the 10MHz input. > > > > _______________________________________________ > USRP-users mailing list > [email protected] > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >
_______________________________________________ USRP-users mailing list [email protected] http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
