Re: [time-nuts] syncronized clocks

Dear CA, In my document describe my Frequency and Time standard you can find some info about the difference and limit of the two solution. GPSDO and Rubidium frequency standard can be alternative or complementary, depends on your goals. see:

[time-nuts] syncronized clocks

> Le 17 sept. 2015 à 02:00, Can Altineller a écrit : > > Hello, > > I started putting a test setup together when I suspected the DS3231 RTC's I > got from dx.com were fake. So I put 2 mcus, each measuring microseconds > from each 1PPS output with an interrupt, for the

Re: [time-nuts] syncronized clocks

On Thu, Sep 17, 2015 at 2:00 AM, Can Altineller wrote: > Hello, > > I started putting a test setup together when I suspected the DS3231 RTC's I > got from dx.com were fake. So I put 2 mcus, each measuring microseconds > from each 1PPS output with an interrupt, for the unit

[time-nuts] Fwd: F S manual

-- Forwarded message -- From: Pete Williams Date: Thu, Sep 17, 2015 at 3:24 PM Subject: F S manual To: time-nuts@febo.com Manual to quit... HP Cesium Beam Frequency Standard 5061A. ​​ Original and in G C. Applies to S/N prefix 1428A and has

Re: [time-nuts] syncronized clocks

Wow, you're all over the place here :-) The "1-2 microsecond drift every second" you observe for the two RTC's relative to each other, is entirely consistent with the few ppm spec for that device. If you start tweaking the trim frequency you should be able to get it trimmed to better than a ppm

[time-nuts] syncronized clocks

A friend of mine is the clock chip guru at one of the major semiconductor manufacturers. He said that the jitter in clock chip oscillators is rather horrendous. Getting an oscillator to reliably start and run smoothly on nanowatts of power is the major design issue for clock chips. Jitter