[time-nuts] Calculated ADEV does not match expectation

2016-04-24 Thread Wolfgang Wallner
it changes for different Tau values. regards, Wolfgang On 04/19/2016 07:46 AM, Wolfgang Wallner wrote: Hello Anders, Do you get agreement between PLN time-series and calcluated ADEVs, as per IEEE1139-2008 table B.2 ? Yes, I explicitly cite IEEE1139-2008 table B.2 in my thesis. I will write a

Re: [time-nuts] [Announce] Simulation software for powerlaw noise and PTP clock synchronization

2016-04-19 Thread Wolfgang Wallner
Hello Anders, Do you get agreement between PLN time-series and calcluated ADEVs, as per IEEE1139-2008 table B.2 ? Yes, I explicitly cite IEEE1139-2008 table B.2 in my thesis. I will write a more detailed reply with example data later when I get home. If you would like to try out the noise

Re: [time-nuts] [Announce] Simulation software for powerlaw noise and PTP clock synchronization

2016-04-19 Thread Wolfgang Wallner
Hello Mike, Thank you for sharing. I would like a copy of your Thesis when it published (I don't need a physical copy, .pdf is ok). I'm sure others out here would like to see it as well. I'll post an update once it is published, which is hopefully soon :) The thesis will then be available as

[time-nuts] [Announce] Simulation software for powerlaw noise and PTP clock synchronization

2016-04-14 Thread Wolfgang Wallner
1588-2008, 2016, Vienna University of Technology As of this writing (April 2016), it is not yet published, the expected publication date will be May or June 2016. I hope these projects can be useful for some of you :) In case you have any questions, feel free to ask. Kind regards, Wolfgang

Re: [time-nuts] AVAR - S_Y conversion

2015-03-22 Thread Wolfgang Wallner
Hello time-nuts community, thanks to your feedback and that of others, I could make additional progress on my journey to understand powerlaw noise :) I would like to reiterate what I have learned so far. Please comment on anything that you think is done wrong.

Re: [time-nuts] AVAR - S_Y conversion

2015-03-22 Thread Wolfgang Wallner
for the Random Walk phase noise. Cheers, Magnus On 03/09/2015 04:57 PM, Wolfgang Wallner wrote: On 03/06/2015 10:29 PM, Magnus Danielson wrote: I have checked several sources, and they match up with the IEEE 1139 in this regard. I have also evaluated the equation for Allan variance

Re: [time-nuts] Comparing the BeagleBone Black Raspberry Pi asNTP servers

2015-03-22 Thread Wolfgang Wallner
What kernel do you use? And what scheduling configuration? As it is a timing application, and sensible to jitter, I would suggest to use a real-time kernel (e.g. Preempt RT) [1]. Usually one can find pre-built kernels with PreempRT-support for boards like the RPi etc. on the internet. If you

Re: [time-nuts] AVAR - S_Y conversion

2015-03-12 Thread Wolfgang Wallner
Hello Tom, hello time-nuts, Have a look at the 20 plots in: http://leapsecond.com/pages/allan/Exploring_Allan_Deviation_v2.pdf Thanks for sharing the data and the PDF! It's good to have reference values. I also had a look at the stable32 user manual [1] to see how it calculates the PSD

Re: [time-nuts] AVAR - S_Y conversion

2015-03-09 Thread Wolfgang Wallner
/matlabcentral/fileexchange/31319-stability-analyzer-53230a [6] IEEE 1139 [7] http://de.mathworks.com/help/signal/ug/psd-estimate-using-fft.html [8] http://www.dspguide.com/ch9/1.htm Cheers, Magnus On 03/06/2015 11:04 AM, Wolfgang Wallner wrote: On 03/05/2015 07:23 PM, Attila Kinali wrote

Re: [time-nuts] AVAR - S_Y conversion

2015-03-06 Thread Wolfgang Wallner
On 03/05/2015 07:23 PM, Attila Kinali wrote: Servus! Servus :) On Thu, 05 Mar 2015 14:35:51 +0100 Wolfgang Wallner wolfgang-wall...@gmx.at wrote: For the random walk noise the expected line is off by a factor of exactly 2 from the calculated plot, and I don't know how to explain

[time-nuts] AVAR - S_Y conversion

2015-03-05 Thread Wolfgang Wallner
/mxhxeszqx/full/ Flicker FM: http://postimg.org/image/3vzpj7jmf/full/ Random Walk: http://postimg.org/image/hxad6okwv/full/ -- the bad guy Does anyone know the reason for the behavior I see? best regards, Wolfgang Wallner PS: I tried to keep this mail short. If I have left out any information

Re: [time-nuts] Simulation of oscillator noise

2013-11-30 Thread Wolfgang Wallner
Hello, thanks a lot for all your feedback (also in the other threads)! It will take some time to read reed through all your recommendations :) On 11/28/2013 08:18 PM, Attila Kinali wrote: On Thu, 28 Nov 2013 10:35:33 +0100 Wolfgang Wallner wolfgang-wall...@gmx.at wrote: I'm interested

[time-nuts] Simulation of oscillator noise

2013-11-28 Thread Wolfgang Wallner
, but no detailed allan variance graphs. Best regards, Wolfgang Wallner PS: When I use the word oscillator I mean the cheap quartz oscillators as found in typical consumer electronic stuff. PPS: I'm not sure if this mailing-list is the right place to ask my questions, as simulation is not listed