Re: [time-nuts] Simulation of oscillator noise

2013-11-29 Thread Magnus Danielson
On 11/28/2013 03:28 PM, Jim Lux wrote: > On 11/28/13 1:35 AM, Wolfgang Wallner wrote: >> >> Hello Time-Nuts community, >> >> I'm interested in the simulation of oscillator noise (especially in >> discrete event simulators). >> >> >> PS: When I use the word oscillator I mean the cheap quartz >> osci

Re: [time-nuts] Simulation of oscillator noise

2013-11-29 Thread Magnus Danielson
Jim, On 11/29/2013 07:27 PM, Jim Lux wrote: > On 11/29/13 8:50 AM, Magnus Danielson wrote: >> On 11/29/2013 04:11 PM, Jim Lux wrote: >>> On 11/29/13 5:56 AM, Azelio Boriani wrote: Unfortunately that was a contribution from Magnus in 2010 (see www.febo.com/pipermail/time-nuts/2010-Ap

Re: [time-nuts] Simulation of oscillator noise

2013-11-29 Thread Jim Lux
On 11/29/13 8:50 AM, Magnus Danielson wrote: On 11/29/2013 04:11 PM, Jim Lux wrote: On 11/29/13 5:56 AM, Azelio Boriani wrote: Unfortunately that was a contribution from Magnus in 2010 (see www.febo.com/pipermail/time-nuts/2010-April/046932.html ) that I have simply reported without verifyin

Re: [time-nuts] Simulation of oscillator noise

2013-11-29 Thread Magnus Danielson
On 11/28/2013 08:18 PM, Attila Kinali wrote: > On Thu, 28 Nov 2013 10:35:33 +0100 > Wolfgang Wallner wrote: > >> I'm interested in the simulation of oscillator noise (especially in discrete >> event simulators). >> I came across this topic as part of the literature research for my master's >> th

Re: [time-nuts] Simulation of oscillator noise

2013-11-29 Thread Magnus Danielson
On 11/29/2013 04:11 PM, Jim Lux wrote: > On 11/29/13 5:56 AM, Azelio Boriani wrote: >> Unfortunately that was a contribution from Magnus in 2010 >> >> (see www.febo.com/pipermail/time-nuts/2010-April/046932.html ) >> >> that I have simply reported without verifying the link and found that >> link

Re: [time-nuts] Simulation of oscillator noise

2013-11-29 Thread Jim Lux
On 11/29/13 5:56 AM, Azelio Boriani wrote: Unfortunately that was a contribution from Magnus in 2010 (see www.febo.com/pipermail/time-nuts/2010-April/046932.html ) that I have simply reported without verifying the link and found that link unusable after sending the message. My best guess is th

Re: [time-nuts] Simulation of oscillator noise

2013-11-29 Thread Azelio Boriani
Unfortunately that was a contribution from Magnus in 2010 (see www.febo.com/pipermail/time-nuts/2010-April/046932.html ) that I have simply reported without verifying the link and found that link unusable after sending the message. My best guess is this: http://www.crya.unam.mx/radiolab/recurso

Re: [time-nuts] Isolation achieved by opamp based isoamp?

2013-11-29 Thread Stephan Sandenbergh
Thank you all for the comments, articles and numbers on real opamp setups - I find it really helpful. On 24 November 2013 17:29, Bob Camp wrote: > Hi > > Switch over to 60Hz power and I’ll bet those spurs move to 120Hz. > > Anything with a rectifier in it can produce (but may not produce) nas

Re: [time-nuts] DIY QFH

2013-11-29 Thread Jim Lux
On 11/28/13 6:27 AM, Chuck Harris wrote: As far as I know it is L1 only. It is a Bullet II HE, P/N 25045-10, the standard antenna specified in the Thunderbolt manual. If you look closely, you will notice that what appears to be a single soldered joint at the middle, is really two solder joints,

Re: [time-nuts] Strange 100ns jumps on Motorola M12+T

2013-11-29 Thread Stephan Sandenbergh
I'm now wading through the GPS data I logged to see if anything happened at the time of the jumps. Will post once I find something. On 29 November 2013 15:35, Stephan Sandenbergh wrote: > Hi All, > > I have now redone the original experiment (same settings), and this time > round no jumps at all

Re: [time-nuts] Simulation of oscillator noise

2013-11-29 Thread Stephan Sandenbergh
Wolfgang, A colleague of mine wrote this simulator based on a multirate filterbank: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=5461653&queryText%3Dm+brooker+phase+noise Since you are in the academia I'd assume you'll be able to access it? Cheers, Stephan. On 28 November 2

Re: [time-nuts] Strange 100ns jumps on Motorola M12+T

2013-11-29 Thread Stephan Sandenbergh
Hi All, I have now redone the original experiment (same settings), and this time round no jumps at all. Strange. This means I cannot reproduce what I originally measured, making it all the more difficult to hunt down the issue with certainty. Thank you for the good advice thus far. For future mea

Re: [time-nuts] Simulation of oscillator noise

2013-11-29 Thread Attila Kinali
On Thu, 28 Nov 2013 10:35:33 +0100 Wolfgang Wallner wrote: > I'm interested in the simulation of oscillator noise (especially in discrete > event simulators). > I came across this topic as part of the literature research for my master's > thesis, and have to admit that I really underestimated h

Re: [time-nuts] Simulation of oscillator noise

2013-11-29 Thread Attila Kinali
Ciao, On Thu, 28 Nov 2013 14:03:06 +0100 Azelio Boriani wrote: > http://horology.jpl.nasa.gov/papers/FlfmSimPtti.pdf This host has ceased to exist. Can you tell us the title of the paper and the names of its authors? Attila Kinali -- 1.) Write everything down. 2.) Red

Re: [time-nuts] DIY QFH

2013-11-29 Thread Attila Kinali
On Wed, 27 Nov 2013 08:32:58 -0800 Jim Lux wrote: > What's interesting is that this is NOT a crossed dipole, at least from > what I can see. It looks like all 4 arms are connected to the same point > at the top. So it's some sort of funky folded monopole The generic helical antenna is just a f

Re: [time-nuts] Simulation of oscillator noise

2013-11-29 Thread Jim Lux
On 11/28/13 1:35 AM, Wolfgang Wallner wrote: Hello Time-Nuts community, I'm interested in the simulation of oscillator noise (especially in discrete event simulators). PS: When I use the word oscillator I mean the cheap quartz oscillators as found in typical consumer electronic stuff. PPS:

Re: [time-nuts] DIY QFH

2013-11-29 Thread Chuck Harris
As far as I know it is L1 only. It is a Bullet II HE, P/N 25045-10, the standard antenna specified in the Thunderbolt manual. If you look closely, you will notice that what appears to be a single soldered joint at the middle, is really two solder joints, one on each of the sides of the preamp's

Re: [time-nuts] DIY QFH

2013-11-29 Thread Jim Lux
On 11/27/13 11:21 PM, Attila Kinali wrote: On Wed, 27 Nov 2013 04:02:53 -0800 Jim Lux wrote: [Crossed dipole antennas] I don't know how they do the phase quadrature.. do they make one dipole a bit longer and the other a bit shorter? Yes. Same principle as with patch antennas. Yes, but on

Re: [time-nuts] Simulation of oscillator noise

2013-11-29 Thread Adrian
Hello Wolfgang, lots of interesting reading about oscillator noise: http://rubiola.org/index.html There are also some phase noise related publications from Ulrich L. Rohde: http://www.tu-cottbus.de/fakultaet3/de/fakultaet/institute/stiftung/prof-dr-ing-habil-dr-hc-mult-ulrich-l-rohde/technical-p

[time-nuts] ESO's historical R&S Cs clock

2013-11-29 Thread Poul-Henning Kamp
Spotted this: http://www.eso.org/public/announcements/ann13092/ -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetenc