Re: [time-nuts] GPSDO uncertainties

2018-10-10 Thread donald collie
Nobody in this group could answer my question. Thankyou, nevertheless, to all those who replied. Kind regards...Don Collie jnr ZL4GX On Wed, Oct 10, 2018 at 7:33 AM Mark Sims wrote: > I did some measurements on the Trimble using a TAPR TICC. The "PPS" > adevs are the Trimble and the "OSC" adev

Re: [time-nuts] Fwd: IFCS-EFTF 2019: Call for Papers

2018-10-10 Thread Magnus Danielson
Hi Chris, On 10/10/18 4:36 PM, Attila Kinali wrote: > On Sat, 22 Sep 2018 06:42:59 -0500 > Chris Howard wrote: > >> I read these "calls for papers" things and try to think of >> something "meta" since I am not anywhere near the 'bleeding edge' >> of any such topic.  Maybe a survey of the number

Re: [time-nuts] Noise of digital frequency circuits (was: Programmable clock for BFO use....noise)

2018-10-10 Thread Poul-Henning Kamp
In message , Azelio Boriani writes: >How many samples of the Loran input signal in that 1/6th of the period? Not many: At 5MHz sample rate it was 8 samples. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer

Re: [time-nuts] Noise of digital frequency circuits (was: Programmable clock for BFO use....noise)

2018-10-10 Thread Azelio Boriani
How many samples of the Loran input signal in that 1/6th of the period? On Wed, Oct 10, 2018 at 5:22 PM Poul-Henning Kamp wrote: > > > In message <20181010165425.df6d24aa3825ca765f301...@kinali.ch>, Attila Kinali > w > rites: > > >> >"A Physical Sine-to-Square Converter Noise Model," > >

Re: [time-nuts] Noise of digital frequency circuits (was: Programmable clock for BFO use....noise)

2018-10-10 Thread Poul-Henning Kamp
In message <20181010165425.df6d24aa3825ca765f301...@kinali.ch>, Attila Kinali w rites: >> >"A Physical Sine-to-Square Converter Noise Model," >> > by Kinali, 2018 >> >[...] >Hence the first gain stage already aliases the noise from its whole >bandwidth, which can be a lot of noise if the

Re: [time-nuts] Noise of digital frequency circuits (was: Programmable clock for BFO use....noise)

2018-10-10 Thread Attila Kinali
On Mon, 17 Sep 2018 00:37:43 -0500 Dana Whitlow wrote: > For example, take the case of 10 MHz starting frequency; the phase noise > several MHz out > is likely to be nil. But divide the 10 MHz down to, say, 1 Hz; then > there's likely to be quite a > lot of phase noise within "folding range" of

Re: [time-nuts] Noise of digital frequency circuits (was: Programmable clock for BFO use....noise)

2018-10-10 Thread Attila Kinali
Salut Mattia, On Thu, 20 Sep 2018 12:31:01 +0200 Mattia Rizzi wrote: > > People talk of aliasing and sampling, > > but do not describe where the sampling happens in the first place. > > After all, it's a time-continuous system and as such, there is no > > sampling. > > I would say that the samp

Re: [time-nuts] Noise of digital frequency circuits

2018-10-10 Thread Attila Kinali
On Thu, 20 Sep 2018 23:45:27 +0200 Achim Gratz wrote: > Attila Kinali writes: > > People talk of aliasing and sampling, but do not describe where the > > sampling happens in the first place. After all, it's a > > time-continuous system and as such, there is no sampling. > > That may be quibblin

Re: [time-nuts] Oscilloscope-based measurements of frequency stability

2018-10-10 Thread Christoph Kopetzky
Hello Dana, thank you for your detailied description. I will try this out in the next days. Scopes became a right normal permanent instrument in the electronics lab of time-nuts like a multimeter for the electrician. Before I connect a counter onto a signalsource which I want to characterize

Re: [time-nuts] Fwd: IFCS-EFTF 2019: Call for Papers

2018-10-10 Thread Attila Kinali
On Sat, 22 Sep 2018 06:42:59 -0500 Chris Howard wrote: > I read these "calls for papers" things and try to think of > something "meta" since I am not anywhere near the 'bleeding edge' > of any such topic.  Maybe a survey of the number of NTP-using > devices in the world  (people love charts and s