Hi Marcus, >The Octoclock is basically a *distributor* of PPS and 10MHz. It cannot use the 1PPS to phase-lock its internal clock.
>For the 10MHz signal from your time-provider, I would insert a 3-5dB attenuator, since the lowest level of the > TimeProvider output is right at the top end of what the Octoclock can tolerate. Thanks, really appreciate it. On Thu, 13 Mar 2025 at 14:17, Marcus D. Leech <patchvonbr...@gmail.com> wrote: > On 13/03/2025 09:30, Chris Newman via USRP-users wrote: > > Hi, > > I found some documentation for the Timeprovider 4100 and there are 2 ports > which can be configured to output either 1PPS or 10MHz. The latter is a > square wave so I guess I can plug that into the Octoclock: > > [image: image.png] > > The question now is if the Timeprovider's PPS output is compatible with > the Octoclock. I note the pulse width is configurable is set to 1000, and > there is also an offset param: > > [image: image.png] > > > And, if the PPS is ok then can the Octoclock derive the Freq from that or > is it better to plug both in separately. > > > > On Thu, 13 Mar 2025 at 10:57, Chris Newman <chris@mode51.software> > <chris@mode51.software> wrote: > >> Hi, >> >> I'd like to use a Chronos Timeprovider 4100 >> <https://chronos.uk/product/telecom-master-clocks/timeprovider-4100-precise-timing-grandmaster-r2-4/> >> to provide the input signals to the Octoclock CDA-2990. >> >> Will the Octoclock accept the Timeprovider's signals for 10MHz and PPS? >> Presumably the Timeprovider is outputting sine waves. >> >> I see the Octoclock outputs the square waves needed by the SDRs. >> Therefore, I guess the question is - can the Octoclock convert sine waves >> to square waves? >> >> The Octoclock FAQ states: >> >> >> - *What are the input and output specifications?* >> >> >> - 10 MHz Input – 0-10 dBm >> - 10 MHz Outputs - ~1.4 Vpp Square Wave, Impedance 50 ohm nominal >> - 1 PPS Input - Logic-level pulse, 2.5 V - 5 V >> - 1 PPS Outputs - Logic-level pulse, 2.5 V - 5 V >> >> >> >> -- >> > > _______________________________________________ > USRP-users mailing list -- usrp-users@lists.ettus.com > To unsubscribe send an email to usrp-users-le...@lists.ettus.com > > The Octoclock is basically a *distributor* of PPS and 10MHz. It cannot use > the 1PPS to phase-lock its internal clock. > > For the 10MHz signal from your time-provider, I would insert a 3-5dB > attenuator, since the lowest level of the > TimeProvider output is right at the top end of what the Octoclock can > tolerate. > > > _______________________________________________ > USRP-users mailing list -- usrp-users@lists.ettus.com > To unsubscribe send an email to usrp-users-le...@lists.ettus.com >
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