Re: [time-nuts] Problem behind failing Galileo clocks identified

Hi I’d bet that the “learning” about atomic clocks is not the only thing going on. Like any organization, they aren’t really very excited about talking about problems they have not solved yet. Bob > On Jul 22, 2017, at 8:37 PM, Mark Sims wrote: > > Does anybody know why

[time-nuts] Problem behind failing Galileo clocks identified

Does anybody know why it is taking so long to commission the last batch of 4 sats launched at the end of last year? It took them 6 months to enable the first two. The other two are still unavailable. ___ time-nuts mailing list -- time-nuts@febo.com

Re: [time-nuts] Cross-correlatiion workshop at EFTF-IFCS-2017

A similar topic is in http://ieeexplore.ieee.org/document/7138792/ 73 de Ulrich In a message dated 7/22/2017 6:15:58 P.M. Eastern Daylight Time, mag...@rubidium.dyndns.org writes: Fellow time-nuts, I thought that I should write a few lines about the EFTF-IFCS, so a good start

Re: [time-nuts] Cross-correlatiion workshop at EFTF-IFCS-2017

Here is something of further interest: _The impact of thermal energy on cross spectrum PM noise measurements_ (http://ieeexplore.ieee.org/document/7546809/) _Yannick Gruson_ (http://ieeexplore.ieee.org/search/searchresult.jsp?searchWithin="Authors":.QT.Yannick%20Gruson.QT.=true) ;

[time-nuts] Cross-correlatiion workshop at EFTF-IFCS-2017

Fellow time-nuts, I thought that I should write a few lines about the EFTF-IFCS, so a good start would be the Cross-correlation workshop which is about addressing the complexities of the cross-correlation measurement and achieving stable and proper measurements. This session was curated by

Re: [time-nuts] RS-232 Pin Outs for the Acron Zeit WWVB LCD Clock

> Or would I need to find an similar device which inverts the incoming logic > first? It's not just inversion but also level shifting. Many battery operated devices run from a dual or even single AA battery. The custom serial adapter shipped with these units handles the conversion of 1.5 or

Re: [time-nuts] RS-232 Pin Outs for the Acron Zeit WWVB LCD Clock

I'm wondering if something like this $10 item http://www.nulsom.com/datasheet/NS-RS232_en.pdf Would perform the same function as the components in the factory cable once I've figured the pinout at the clock end, which shouldn't be too hard unless someone has done that already. Or would I need

[time-nuts] Problem behind failing Galileo clocks identified

"Investigators have uncovered the problems behind the failure of atomic clocks onboard Galileo satellites, the European Commission said." See: http://galileognss.eu/problem-behind-failing-clocks-identified/ May be of some interest. Cheers, David -- SatSignal Software - Quality software

Re: [time-nuts] RS-232 Pin Outs for the Acron Zeit WWVB LCD Clock

The LM-358 Op-Amp is used to Invert the Serial Data (RxD, TxD) stream. http://www.st.com/content/ccc/resource/technical/document/datasheet/61/46/87/01/98/ed/44/c5/CD0464.pdf/files/CD0464.pdf/jcr:content/translations/en.CD0464.pdf Coupled with the usage of an RJ11 (4P4C, modular) ...