Re: [time-nuts] I've designed a GPSDO, but how good is it?

2015-08-17 Thread Nick Sayer via time-nuts
our constraints diverge from your constraints, the further off base our advice and answers will be. I appreciate that. I came here with a narrow question in mind, but perhaps it wasn’t the correct one. Bob On Aug 16, 2015, at 3:39 PM, Nick Sayer via time-nuts time-nuts@febo.com

Re: [time-nuts] I've designed a GPSDO, but how good is it?

2015-08-17 Thread Nick Sayer via time-nuts
is it? On Mon, 17 Aug 2015 07:14:34 -0700 Nick Sayer via time-nuts time-nuts@febo.com wrote: Without having had a look at your code (sorry, i currently don't have the time for this), if you trully implemented just an FLL, then this is where you should start from. The way to get a PLL is to let

Re: [time-nuts] I've designed a GPSDO, but how good is it?

2015-08-17 Thread Nick Sayer via time-nuts
On Aug 17, 2015, at 12:07 PM, Attila Kinali att...@kinali.ch wrote: On Mon, 17 Aug 2015 07:14:34 -0700 Nick Sayer via time-nuts time-nuts@febo.com wrote: Without having had a look at your code (sorry, i currently don't have the time for this), if you trully implemented just an FLL

Re: [time-nuts] I've designed a GPSDO, but how good is it?

2015-08-16 Thread Nick Sayer via time-nuts
://www.ke5fx.com/timelab/readme.htm). /tvb - Original Message - From: Nick Sayer via time-nuts time-nuts@febo.com To: time-nuts@febo.com Sent: Sunday, August 16, 2015 11:47 AM Subject: [time-nuts] I've designed a GPSDO, but how good is it? I’ve designed and make and sell a GPSDO

Re: [time-nuts] I've designed a GPSDO, but how good is it?

2015-08-16 Thread Nick Sayer via time-nuts
On Aug 16, 2015, at 2:27 PM, Attila Kinali att...@kinali.ch wrote: On Sun, 16 Aug 2015 11:47:23 -0700 Nick Sayer via time-nuts time-nuts@febo.com wrote: I’ve designed and make and sell a GPSDO on Tindie (https://hackaday.io/ project/6872-gps-disciplined-tcxo). It’s brand new - I’ve

[time-nuts] I've designed a GPSDO, but how good is it?

2015-08-16 Thread Nick Sayer via time-nuts
I’ve designed and make and sell a GPSDO on Tindie (https://hackaday.io/project/6872-gps-disciplined-tcxo). It’s brand new - I’ve sold a handful of them so far. So as to make this post not *entirely* self-serving, what I would like is some further guidance on how I can better characterize its

Re: [time-nuts] I've designed a GPSDO, but how good is it?

2015-08-16 Thread Nick Sayer via time-nuts
On Aug 16, 2015, at 12:31 PM, Tom Van Baak t...@leapsecond.com wrote: Anyway, to answer your question -- to measure its true performance you only need two things. 1) a phase meter (or time interval counter) that's good to 1 ns or better, and 2) a local reference standard that's maybe 10x

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