Re: [time-nuts] Raw phase data of super-5065

On Thu, 14 Jun 2018 15:14:55 +0200 Magnus Danielson wrote: > Do we have the raw measurements in a readable format? Yes, you can find them at http://time.kinali.ch/phase_data/luciano/ Attila Kinali -- It is upon moral qualities that a society is ultimately founded.

Re: [time-nuts] a newbie question: where can I purchase 794.7nm VCSEL for building CPT rubidium clock?

ices than they put into the datasheet. They do not include it because they can either not sufficiently control those parameters during production, cannot test for it or testing would be too expensive. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. A

Re: [time-nuts] Raw phase data of super-5065

hanges. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Diamond Age, Neil Step

Re: [time-nuts] Raw phase data of super-5065

it as something more standard? Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Diamond Age,

Re: [time-nuts] a newbie question: where can I purchase 794.7nm VCSEL for building CPT rubidium clock?

ge should give you enough margin. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Diamond

Re: [time-nuts] a newbie question: where can I purchase 794.7 nm VCSEL for building CPT rubidium clock?

ulling) down. The current state of affairs is quite nicely documented in their two papers at 8FSM[1,2,3]. Attila Kinali [1] Proceedings of the 8th Symposium on Frequency Standards and Metrology http://conferenceseries.iop.org/conferenceseries/issue/1742-6596/723/1 [2

Re: [time-nuts] ?==?utf-8?q? a newbie question: where can I purchase 794.7 nm VCSEL for building CPT rubidium clock?

nished how expensive those VCSEL are. I would have guessed they are below $100/pcs, given that "normal" laser diodes are usually in the order of $10-$20. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity a

Re: [time-nuts] a newbie question: where can I purchase 794.7 nm VCSEL for building CPT rubidium clock?

ich directly translates into higher stability. As polarisation scheme, I suggest using σ+/σ- as it seems to be more robust than the lin/lin schemes. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological so

[time-nuts] Raw phase data of super-5065

Hoi zäme! Would one (preferably multiple) of the owners of a super-5065 be so kind and share the raw phase data of an super-5065 against a stable reference with me? The longer the data trace, the better. Thanks in advance! Attila Kinali -- It is upon moral qualities

[time-nuts] Traveling to the US west coast

Hi, Some of you might already know, I will fly to the US west coast to attend IFCS. Afterwards, I will be in Seattle for a couple of days (from 25th to 31st). If you are in the area and want to meet up, please drop me an email (off-list). Attila Kinali -- It is upon

Re: [time-nuts] 4046 replacement

a HEF74HC4046AN [that`s if it > doesn`t have the same bug], or a 74HC7046AN - which is similar. Both these > chips are more-or-less pin compatable TIA for any What design flaw are you talking about? Attila Kinali -- It is upon moral qualities that a society is ul

Re: [time-nuts] suggestions on getting 24 Mhz ?

ly, using an ADF4002 with a small uC to configure it and a VCXO/VCO should also work. Attila Kinali -- The bad part of Zurich is where the degenerates throw DARK chocolate at you. ___ time-nuts mailing list --

Re: [time-nuts] femtosecond jitter

ur test rig may well dominate > the jitter, so the flop is probably better. I heard similar numbers for the NB7V52 last week at EFTF. So you cannot be that far off. Attila Kinali -- The bad part of Zurich is where the degenerates throw DAR

Re: [time-nuts] Help improving impedance measurement by having a better clock

something like 14-15bit @500kHz, 1ps rms should be around 18bits, if I'm not mistaken. To measure the performance, I would just build the device and feed it with an appropriate sine wave. Then analyze the SNR and spurs of the sampled signal. Attila Kinali -- It

Re: [time-nuts] Cheap jitter measurements

ng is to use a TDC7200 like in the TICC. Of course, you will need a standard that is stable enough on the time scales you are looking at. Which is for short taus (<100s) a good OCXO and for 1s to 10ks an Rb, and beyond that a Cs beam standard or hydrogen maser.

Re: [time-nuts] quartz / liquid nitrogen

plifiers and the 50 Ohm system for termal noise. I do not remember reading anything about flicker noise, but my guess would be that it decreases as well. I am sure I have some paper on this somewhere in my collection, if you want I can dig it out. Attila Kinali

Re: [time-nuts] Timestamping audio waveforms

with all kinds of settings while running Oh, and don't even try to run anything ontop of pulseaudio, it is known to mess up audio timing by several 10ms, sometimes even over 100ms. Attila Kinali [1] https://gist.github.com/albanpeignier/104902 -- The bad part of Zurich

[time-nuts] Open Access (was: WWV/CHU)

from personal experience I can say that it's much more likely that easily available papers get cited than one that is behind an inpenetrable pay-wall. Attila Kinali -- The bad part of Zurich is where the degenerates throw DARK chocolate at you. ___

Re: [time-nuts] WWV/CHU

ou feed the RTL-SDR from an external frequency source, you should be able to related that frequency source to WWV. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use

Re: [time-nuts] What does determine the short term stability of an Rb vapor cell standard?

constant too long. Attila Kinali [1] http://www.ke5fx.com/rb.htm -- The bad part of Zurich is where the degenerates throw DARK chocolate at you. ___ time-nuts mailing list -- time-nuts@febo.com To unsubs

Re: [time-nuts] What does determine the short term stability of an Rb vapor cell standard?

g/wander of the laser wavelength. As for intensity noise, yes, it's not glorious with lasers, but most papers I've read have a stabilization for that as well, so it gets attenuated a bit. Attila Kinali -- The bad part of Zurich is where the degenerates

[time-nuts] What does determine the short term stability of an Rb vapor cell standard?

of this is wrong and what am I missing? Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Diamond Age, Neil

Re: [time-nuts] ULN regulator with more current capability than LT3042?

(ie load changes lead to heavy ringing)of course, this is under the assumption that the spice model of the LT3042 is accurate in that regard. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistica

Re: [time-nuts] Recommendations for Mains Power Monitor / Logger

ny sampling frequency between 200Hz and 1kHz should do the job, Which is slow enough so you can still handle the samples with the uC alone and don't need any fancy DSP. Attila Kinali -- The bad part of Zurich is where the degenerates throw

Re: [time-nuts] Recommendations for Mains Power Monitor / Logger

ick interface (yes, GnuRadio can be used for more than just to look for long lost satellites with oversized antennas ;-). This way you don't even need a 90° hybrid or anything similarly temperature sensitive. Attila Kinali -- The bad part of Zurich is where the degenera

Re: [time-nuts] Recommendations for Mains Power Monitor / Logger

will have an uncontrolled raise in power supply voltage and might exceed the rating of your circuit. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without t

Re: [time-nuts] Ultra low power RTC

ed into heat directly and never leaves the cell in a usable form. Attila Kinali -- The bad part of Zurich is where the degenerates throw DARK chocolate at you. ___ time-nuts mailing list -- time-nuts@febo.com To uns

Re: [time-nuts] Frequency deviations in Europe affect clocks

have a central HBG receiver at all train stations, with a few exceptions where reception was bad (there, they got a special permission to use DCF77 instead). I have no idea what they use these days for synchronization. Attila Kinali -- The bad part of Zurich is where

Re: [time-nuts] Ultra low power RTC

A human body dissipates something around 100 to 200W of heat, constantly but this is going a bit too OT I guess :-) Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication

[time-nuts] How to properly simulate PLLs?

, what should I read? (My google foo didn't return anything helpful). Thanks in advance Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation

Re: [time-nuts] Ultra low power RTC

would just run the crystal > all the time. The the watches (quartz with analog dials) I have run >5 years on their batteries, an I am pretty sure they don't have a CR2032. And at least one of them must have a TCXO. Attila Kinali -- It is upon moral qualities that a society

Re: [time-nuts] ADEV data for mechanical clocks

om/ten/clock-powers-of-ten-tvb.pdf Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Diamo

Re: [time-nuts] Ultra low power RTC

g coin sized LiMnO2 cells (e.g. a CR2032 is specced in the order of 100-300nA self-discharge). For the smaller cells, you have to check which one is larger, but they are of the same order of magnitude. Attila Kinali -- It is upon moral qualities that a society i

Re: [time-nuts] Ultra low power RTC

easure when the normal power supply is lost. Attila Kinali -- The bad part of Zurich is where the degenerates throw DARK chocolate at you. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] ECS ECOC-2522 (was GPS Talking Clock)

and probably other deterministic effects) before calculating ADEV. Attila Kinali -- The bad part of Zurich is where the degenerates throw DARK chocolate at you. ___ time-nuts mailing list -- time-nuts@febo.co

Re: [time-nuts] Need a Watch Recommendation

you do not wear it, it's very accurate. I guess they use the internal termperature sensor to compensate the crystal. How they get to sub-ppm stability over half a year, I have no clue. And this one is almost 20 years old. Attila Kinali -- It is upon moral qualities

Re: [time-nuts] Need a Watch Recommendation

Swiss quartz watch :-) Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Diamond Age, Nei

[time-nuts] lasers (was: Microsemi up for sale?)

(note: their calculation of linewidth is wrong, it should be 36kHz/sqrt(2) = 25kHz). The price was, when I looked at it 2 years ago, at 2500€. Attila Kinali [1] https://en.wikipedia.org/wiki/Diffraction_grating [2] https://www.youtube.com/watch?v=EuWI1WPrZ2I [3] "Mode stab

Re: [time-nuts] FRK

manual on Didier's site. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Diamond Ag

Re: [time-nuts] Assorted replies, and request for info

our own LED lights, with properly filtered current sources. Nothing difficult, but you have to design it properly because you are dealing with mains power. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technolo

Re: [time-nuts] FRK

anufactured for hi-rel applications. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The

Re: [time-nuts] FRK

ng on my desk for way too long: http://time.kinali.ch/Efratom_FRK-L/ Yes, there are only the pictures of the four PCBs from outside. I didn't want to take the FRK further appart, as that would require a soldering iron, and I really should be doing something else. Attila Kin

Re: [time-nuts] Replacement A9 boards for the HP 5065A

injection noise be too large for this application? Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation.

Re: [time-nuts] Allan variance by sine-wave fitting

ffected by various components in the signal path. But our mathematical description is lacking at best (we only can descirbe white and 1/f^2 noise properly). Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technolog

Re: [time-nuts] Selling Time and Frequency Equipment

itm/DATUM-Symmetricom-4040B-077-003-08832-129-Cesium-Frequency-Standard-Atomic-Clock/112745451687 Just saying... Attila Kinali -- The bad part of Zurich is where the degenerates throw DARK chocolate at you. ___

Re: [time-nuts] HP 5065A super

t is present. If -180 db is the goal for those spurs, you might > only > hit -120 db with the nickel connectors ….. Interesting. About what frequency range are you talking? Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the p

Re: [time-nuts] HP 5065A super

tor application, this shouldn't be a problem (phase reversal is prevented by the 10k input resistor). Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that found

Re: [time-nuts] HP 5065A super

select your FET carefully, as it then would limit your 1/f noise and determine your leakage current. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without

Re: [time-nuts] HP 5065A super

n that you need hard gold for connector contacts, which is different from the standard gold plating you will get as surface finish. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistica

Re: [time-nuts] LED instead of discharge lamp for Rb vapor cell standards

ficult, but I don't trust that until I have tried myself). Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation.

[time-nuts] LED instead of discharge lamp for Rb vapor cell standards

of the LED, thus potentially less instability due to light-shift variation. Beside the LED operation being much simpler than that of a discharge lamp and overall less heat dissipation. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the

Re: [time-nuts] The "NAKED" 5065A optical unit

ped by other disturbances. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Dia

Re: [time-nuts] The "NAKED" 5065A optical unit

ct is is orders of magnitude worse than > something like an LT3042 low noise regulator. It's >30dB for broadband noise, according to Gerhard Hoffmann's measurement: https://www.flickr.com/photos/137684711@N07/24070698809/in/album-72157662535945536/ Attila Kinali

Re: [time-nuts] The "NAKED" 5065A optical unit

On Tue, 20 Feb 2018 10:03:20 -0800 <cdel...@juno.com> wrote: > You do NOT want to take one apart to this level! > > It's never going to operate again. Why not? Is there something you had to break to open it up this far? Attila Kinali -- It is upon

Re: [time-nuts] eBay GPS antenna.

it works with 12V, seen that it does, and just "adjusted" the specs. But in reality, the LNA still maxes out at 5V if you want a reliable device. Attila Kinali -- The bad part of Zurich is where the degenerates

Re: [time-nuts] Anyone have experience with this antenna?

ear puts out. I don’t know > of any L1 / L2 gear that puts out 5 rather than 12V …. Well, that's at least a very easy modification. Just open up the connection between the bias-T and the LNA and insert some LM1117 or better an TPS7A45xx. Attila Kinali -- It is up

[time-nuts] Etching of quartz crystals (was: Rakon HSO-14)

der why I have not read about anyone doing exactly that (beside for SAW structures). Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that found

Re: [time-nuts] Rakon HSO-14

be quite a bit cheaper (because it doesn't require the couple of µm precision between the resonator and the holder/elctrodes the BVA has). Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistica

Re: [time-nuts] More on SiLabs 5340

proving that the 10 MHz is in control. There is a small detail that puzzles me: the ADEV for the internal reference 10MHz and 30MHz bends upwards at tau greater than 0.1s. Shouldn't that be visible by a change in slope in the phase noise plot at ~10Hz as well? Attila K

Re: [time-nuts] Slightly OT: interest in a four-output, ultra-low jitter, synthesizer block?

d high quality blocking capacitors rated for GHz use. Using 3-terminal pass through capacitors like the Murata EMIFIL[1] goes a long way for these kind of applications (at only a slightly higher price than normal capacitors). Attila Kinali [1] https://www.murata.com/en-glob

Re: [time-nuts] Suggestion for a timing GPS receiver (Trimble / Ublox /other?)

you see only a small portion of the sky and only have 1-2 satellites most of the time, then the position hold mode is the difference between >1µs jitter and <100ns jitter, as Said Jackson noted a few years ago. Attila Kinali -- The bad part of Zurich is whe

Re: [time-nuts] Symmetricom TimeSource 2500

Rb in such a unit. Attila Kinali -- The bad part of Zurich is where the degenerates throw DARK chocolate at you. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mai

Re: [time-nuts] Symmetricom TimeSource 2500

if a piece of equipment needs to be replaced/repaired every 20 to 30 years. Most likely the power supply will die well before you get even to the Rb failing. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technologic

Re: [time-nuts] SI5328

on, I am not entirely sure. The reason why most people do not do this is easily explained: it's more difficult to get a stable system with nested loops, as the conditions for stability becomes more complex than with just a standard, straight forward PID loop. Attila Kinali -- It i

Re: [time-nuts] Suggestion for a timing GPS receiver (Trimble / Ublox / other?)

ther passive or you need an external bias-T. The LEA's can provide up to 50mA (so no Zephyr!). If you want to step up your game and get even better stability, take one of the LEA based GPSDOs (like the Star4 mentioned above). Attila Kinali -- It is upon moral q

Re: [time-nuts] SI5328

lots of less than 10 is not economical, probably should aim for 100. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation.

Re: [time-nuts] trimble Thunderbolt, how to get 25 or 27 mHz from it??

ay away from any VCXO that mentiones "programable" in its datasheet. These are XO + fractional PLL combinations where the PLL allows quick and cheap realization of odd frequencies. But their spurs and noise floor is much worse than normal XOs. Attila Kinali -- It is upon

Re: [time-nuts] AM vs PM noise of signal sources

source resistance, Ie oscillators that have a white noise floor at almost -174dBm (note: dBm not dBc). It is "known" how to build such oscillators, but it doesn't mean it's easy :-) Attila Kinali [1] "A General Theory of Phase Noise in Electrical Oscillat

Re: [time-nuts] AM vs PM noise of signal sources

ion as to how it happens. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Diam

[time-nuts] AM vs PM noise of signal sources

mentiones AM noise levels. The best I could find sofar is [1] which supports the notion that AM noise is so far below PM noise, that it is insignificant. Does someone else have more data and would be willing to share? Attila Kinali [1] http://www.wenzel.com/documents

Re: [time-nuts] Down-conversion to IF and sampling

t time-nuts stable. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Diamond Ag

Re: [time-nuts] Oscilloquartz 8600-3 Disassembly pictures...

be -MM-DD by ISO8601, but too many people confused it as being the "new way" to write dates, so it can be literally anything. Thanks for the pictures! Attila Kinali -- The bad part of Zurich is where the degenerates throw DARK chocolate

Re: [time-nuts] Determining Allan Deviation From Interpolated Peak Frequency Readings

indows as well. If you want to use GnuRadio, I suggest you go to one of the many Hackfests[3] they have and let them jump-start you (I started this way years ago). Attila Kinali [1] https://gnuradio.org/ [2] https://github.com/Microtelecom/libp

Re: [time-nuts] IEEE Spectrum - Dec 2017 - article on chip-scale atomic frequency reference

it is surrounded by a molecule in close proximity. This means the surrounding atoms disturb the electrons of the probed atom. This is what causes the large temperature dependence. Attila Kinali -- It is upon moral qualities that a society is ultimately founded

Re: [time-nuts] IEEE Spectrum - Dec 2017 - article on chip-scale atomic frequency reference

icients, Harding et al measured 89ppm/K. Attila Kinali [1] "Spin Resonance Clock Transition of the Endohedral Fullerene 15N@C60", by Harding, Zhou, Zhou, Myers, Ardavan, Briggs, Porfyrakis, Laird, 2017 https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.

Re: [time-nuts] Determining Allan Deviation From Interpolated Peak Frequency Readings

be the approach in more detail. Other than that, the general approach looks ok. Attila Kinali [1] "Oscillator metrology with software defined radio", by Sherman and Jördens, 2016 https://arxiv.org/abs/1605.03505 -- It is upon moral qualities that a society is

Re: [time-nuts] Fluke/Pendulum PM6680/CNT-80 measurement instability/outliers

t's likely that there is a bad contact somewhere and I or someone else caused that to jump from time to time. Thanks for your time and help! Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technolog

Re: [time-nuts] Performance verification for time counters

pretty much what I'd expect in additional delay, when undoing an SMA connector by one turn. One turn is about 0.7mm, assuming a VF of 0.6 you get to ~3.5ps. I am quite impressed that you could measure it this accurately. What measurement technique do you use? Attila K

Re: [time-nuts] Trimble Mini-T Timing Glitches

for aquisition, or a more sophisticated method. Section 5.8 "signal acquisition" in Kaplan and Hegarty's book[2] contains a few common techniques with good explanations. Attila Kinali [1] ok, it's actually more like 10%/1.91dB loss, because the signal during that

Re: [time-nuts] Performance verification for time counters

z anyways. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Diamond Age, Neil S

[time-nuts] ergodicity vs 1/f (was: Allan variance by sine-wave fitting)

u have at CERN, measure an oscillator for a long time and note down the center frequency with each measurement. I promise you, you will be astonished. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technologica

Re: [time-nuts] Allan variance by sine-wave fitting

endent of ω. And about statistical significance: yes, you will have zero statistical significance about the behaviour of the population of random variables, but you will have a statistically significant number of samples of *one* realization of the random variable. And that's what you work with.

Re: [time-nuts] Allan variance by sine-wave fitting

On Mon, 27 Nov 2017 23:50:22 +0100 Attila Kinali <att...@kinali.ch> wrote: > > Every experimentalist suppose ergodicity on this kind of noise, otherwise > > you get nowhere. > > Err.. no. Even if you assume that the spectrum tops off at some very > low frequency and do

Re: [time-nuts] Allan variance by sine-wave fitting

> you get nowhere. Err.. no. Even if you assume that the spectrum tops off at some very low frequency and does not increase anymore, ie that there is a finite limit to noise power, even then ergodicity is not given. Ergodicity breaks because the noise process is not stationary. And assuming so

Re: [time-nuts] Allan variance by sine-wave fitting

On Mon, 27 Nov 2017 19:37:11 +0100 Attila Kinali <att...@kinali.ch> wrote: > X(t): Random variable, Gauss distributed, zero mean, i.i.d (ie PSD = const) > Y(t): Random variable, Gauss distributed, zero mean, PSD ~ 1/f > Two time points: t_0 and t, where t > t_0 > > T

Re: [time-nuts] Allan variance by sine-wave fitting

e on the experiments. I hope it comes accross that I do not critisize your experiments or the results you got out of them. I critisize the analysis you have done and that it contains assumptions, which you are not aware of, that invalidate some of your results. The experiments are fine. The preci

Re: [time-nuts] Next upgrade

e DAC. But the DNL will be the limiting factor here (unless you use some special techniques) and the (absolute) INL will not get better, for obvious reasons. Attila Kinali -- You know, the very powerful and the very stupid have one thing in common. They don't alters their view

Re: [time-nuts] Allan variance by sine-wave fitting

s of least-squares of sines. I tried it last year and failed. There is lots of math involved that I haven't mastered yet. Attila Kinali -- You know, the very powerful and the very stupid have one thing in common. They don't alters their views to fit the facts, they alter

Re: [time-nuts] Allan variance by sine-wave fitting

like yours. Even though his analysis has problems as well (e.g. he does not account for the numer of samples taken), he is much closer to the what is going on. If you adapt his analysis to your case, you would get a much better result. And a final nitpick: Please use s for seconds instead of sec.

Re: [time-nuts] H-Maser drift (was: Why discipline Rubidium oscillator?)

On Tue, 21 Nov 2017 14:50:48 +0100 Attila Kinali <att...@kinali.ch> wrote: > The source for the Hydrogen atoms is usually a heated platinum > valve (a heated plate of platinum that is thin enough that the > Hydrogen will leak through). Several people pointed out that th

Re: [time-nuts] H-Maser drift (was: Why discipline Rubidium oscillator?)

ty modes are used to shrink the overall cavity size, without the need of loading, which introduces losses. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in t

Re: [time-nuts] H-Maser drift (was: Why discipline Rubidium oscillator?)

rder of magnitude. Hehe.. Yes. It's "small" compared to the cavity. Depending on the exact cavity construction, the storage space can be as small as a tenth of the total cavity volume. Attila Kinali -- It is upon moral qualities that a society is ultimate

[time-nuts] H-Maser drift (was: Why discipline Rubidium oscillator?)

eading to a different cavity pulling. To a lesser extend it's the changes in the quality of the vacuum and number of Hydrogen atoms in the cavity. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological soph

[time-nuts] GNSS signals (was: Why discipline Rubidium oscillator?)

pedia.net/index.php/GLONASS_Signal_Plan http://www.navipedia.net/index.php/BeiDou_Signal_Plan And because everyone likes large, colorful graphs: http://www.insidegnss.com/auto/popupimage/GLONASS%20spectrum%200408.jpg Yes, it's getting crowded. Attila Kinali -- It is u

[time-nuts] Disciplining a Cs beam standard (was: Why discipline Rubidium oscillator?)

to 50 weeks. Simple, right? :-) Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Diamond Age, Nei

Re: [time-nuts] Input filter for data logger

F and not DegC it's OK (depending > on ambient...) The data sheet says 4.2W at 25 DegC. Oops.. I miscalculated the power consumption of the MV89.. Sorry about. Today doesn't seem to be a good day for me to answer questions it seems. Attila Kinali -- You know, the

Re: [time-nuts] Input filter for data logger

On Mon, 20 Nov 2017 11:47:09 +1300 (NZDT) Bruce Griffiths <bruce.griffi...@xtra.co.nz> wrote: > That's a fairly standard JFET BJT negative feedback amp that's not usually > unstable. Uh.. uhmm.. sorry about that... I'm electronically challenged, it seems. A

Re: [time-nuts] Input filter for data logger

MCU can probably take more abuse than the 74AC. Modern ASICs have quite a bit of protection circuits on their inputs. I am not sure whether the 74-families have seen upgrades on their protection circuits in the last 30-40 years. Attila Kinali -- You know, the very

Re: [time-nuts] Input filter for data logger

On Sun, 19 Nov 2017 11:40:27 -0500 Vlad wrote: > I am doing another fun project. It is data logger at this time. The > "heart" is MV89A OCXO and the "brain" is STM32. > "The box" has 1PPS input to control DAC which will control OCXO. BTW, > this M89A is pretty hot to touch. My

[time-nuts] Recommendation for cheap GBIP adapter for Linux

n read-out software (that's quickly and easily done). What would people here recommend? Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that

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