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 --

- *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

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> 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 > > > > -- >

 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



 --

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.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.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> 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 tousrp-users-leave@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.

- *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

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 <patchvonbraun@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-leave@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-leave@lists.ettus.com >