Re: [time-nuts] Question about noisetypes and ADEV

2018-10-29 Thread Magnus Danielson
Hi Attila, On 10/29/18 2:59 PM, Attila Kinali wrote: > Moin, > > I'm bunching a few mails together, to not clutter the mailinglist too much > > On Sat, 27 Oct 2018 23:25:30 +0200 > Magnus Danielson wrote: > >> The integration is very important aspect, as a number of assumptions >> becomes

Re: [time-nuts] Question about noisetypes and ADEV

2018-10-29 Thread Attila Kinali
Moin, I'm bunching a few mails together, to not clutter the mailinglist too much On Sat, 27 Oct 2018 23:25:30 +0200 Magnus Danielson wrote: > The integration is very important aspect, as a number of assumptions > becomes embedded into it, such as the f_H frequency which is the Nyquist >

Re: [time-nuts] Question about noisetypes and ADEV

2018-10-28 Thread Magnus Danielson
Hej Anders! On 10/28/18 1:14 PM, Anders Wallin wrote: > I made a revised figure with a few improvements: > - the PSDs now cross at 1Hz > - the theoretical ADEV/MDEV pre-factors are now explicitly stated > http://www.anderswallin.net/2018/10/noise-colours-again/ > source: >

Re: [time-nuts] Question about noisetypes and ADEV

2018-10-28 Thread Anders Wallin
I made a revised figure with a few improvements: - the PSDs now cross at 1Hz - the theoretical ADEV/MDEV pre-factors are now explicitly stated http://www.anderswallin.net/2018/10/noise-colours-again/ source: https://github.com/aewallin/colorednoise/blob/master/example_noise_slopes2.py I forget

Re: [time-nuts] Question about noisetypes and ADEV

2018-10-28 Thread Magnus Danielson
Hej Ole! On 10/28/18 9:19 AM, Ole Petter Ronningen wrote: > Hi, Magnus! > > Thank you for this! I am of course nowhere near really comprehending it > from reading it a couple of times, but I will still show my ignorance by > asking a couple of questions with respect to the power law noise table.

Re: [time-nuts] Question about noisetypes and ADEV

2018-10-28 Thread Poul-Henning Kamp
In message , Ole Petter Ronningen writes: >1. I notice the formulas for ADEV is different for W PM and F PM - ADEV >does not distinguish between the two, as is pointed out in the article. When we say ADEV does not distinguish those, we mean that the slope of the ADEV with respect to

Re: [time-nuts] Question about noisetypes and ADEV

2018-10-28 Thread Ole Petter Ronningen
Hi, Magnus! Thank you for this! I am of course nowhere near really comprehending it from reading it a couple of times, but I will still show my ignorance by asking a couple of questions with respect to the power law noise table. Counting on your day being still non-grumpy.. :D 1. I notice the

Re: [time-nuts] Question about noisetypes and ADEV

2018-10-28 Thread Ole Petter Ronningen
Hi, Tom! I have looked at the pages you link to many times, they really are very good - my goal here was to get down to the nitty-gritty myself, just understand the details better. Regarding possible bias in the Excel RNG, this was my first hunch as well, but when I repeated the experiment with

Re: [time-nuts] Question about noisetypes and ADEV

2018-10-27 Thread Magnus Danielson
On 10/26/18 1:42 PM, Ole Petter Ronningen wrote: > Hi, Attila > >> I see two issues here: If your random numbers are indeed between 0 and 1, >> as you write, then they are uniformly distributed, and not normally >> distributed. This will give you a slight bias when integrating. >> > > You are

Re: [time-nuts] Question about noisetypes and ADEV

2018-10-27 Thread Magnus Danielson
Hej Attila, On 10/26/18 11:50 AM, Attila Kinali wrote: > Hej Ole, > > On Fri, 26 Oct 2018 11:34:41 +0200 > Ole Petter Ronningen wrote: > >> I'm simulating some noise to try to improve my somewhat sketchy >> understanding of what goes on with the various noise types as shown on an >> ADEV plot.

Re: [time-nuts] Question about noisetypes and ADEV

2018-10-27 Thread Magnus Danielson
Hi Ole, I saw this post and thread, but waited until I had the time to address it sufficiently, as it is an important topic. As such, I really enjoy you asking the question as I am sure it will be a relevant question for many more on this list. On 10/26/18 11:34 AM, Ole Petter Ronningen wrote: >

Re: [time-nuts] Question about noisetypes and ADEV

2018-10-27 Thread Anders Wallin
> Is this some elemental effect of integration (sqrt(n) or some such), or am > I seeing the effects of bandwidth and/or bias-functions or other esoterica? > FWIW the python "colorednoise" (aka. Kasdin-Walter) repo has a figure: https://github.com/aewallin/colorednoise and code that generates the

Re: [time-nuts] Question about noisetypes and ADEV

2018-10-26 Thread Tom Van Baak
Ole, > I'm simulating some noise to try to improve my somewhat sketchy > understanding of what goes on with the various noise types as shown on an > ADEV plot. Nothing fancy, ~3600 points of gaussian random numbers between 0 > and 1 in excel, imported into Timelab as phase data, scaled to ns. I

Re: [time-nuts] Question about noisetypes and ADEV

2018-10-26 Thread Tom Van Baak
> In case the screenshot does not make it though; > W PM starts at 1.69e-9 For this you should expect 1.73 which is sqrt(3). For example: C:\tvb> rand1 100 | adev4 /a 1 rand1 100(count) 1(sdev) 0(mean) 1540577979(seed) ** tau from 1 to 1 step 1 1 a 1.732671e+000 98 > W FM

Re: [time-nuts] Question about noisetypes and ADEV

2018-10-26 Thread Ole Petter Ronningen
Hi, Attila > I see two issues here: If your random numbers are indeed between 0 and 1, > as you write, then they are uniformly distributed, and not normally > distributed. This will give you a slight bias when integrating. > You are correct, my statement was imprecise - I generate numbers

Re: [time-nuts] Question about noisetypes and ADEV

2018-10-26 Thread Attila Kinali
Hej Ole, On Fri, 26 Oct 2018 11:34:41 +0200 Ole Petter Ronningen wrote: > I'm simulating some noise to try to improve my somewhat sketchy > understanding of what goes on with the various noise types as shown on an > ADEV plot. Nothing fancy, ~3600 points of gaussian random numbers between 0 >