Re: [time-nuts] Choosing a GPS IC for carrier phase measurements

2018-08-21 Thread Magnus Danielson
Hi, On 08/22/2018 12:01 AM, Dana Whitlow wrote: > I have Wolaver's book, and it mostly seems pretty readable. Wolaver also > describes > a technique for extending the linear phase range of the classic "digital > phase/freq" detector > to several cycles, not just the usual one-cycle range. Yes.

Re: [time-nuts] Choosing a GPS IC for carrier phase measurements

2018-08-20 Thread Bob kb8tq
Hi > On Aug 20, 2018, at 5:46 AM, Nicolas Braud-Santoni > wrote: > > On Mon, Aug 20, 2018 at 01:15:10AM +0200, Attila Kinali wrote: >> On Sun, 19 Aug 2018 23:26:03 +0200 >> Nicolas Braud-Santoni wrote: >> Yeah. u-blox isn't as nice as they used to be to small customers :-( >>> >>> Ah,

Re: [time-nuts] Choosing a GPS IC for carrier phase measurements

2018-08-19 Thread Bob kb8tq
Hi > On Aug 19, 2018, at 5:26 PM, Nicolas Braud-Santoni > wrote: > > On Sat, Aug 18, 2018 at 08:25:11PM +0200, Attila Kinali wrote: >> On Thu, 16 Aug 2018 17:45:30 +0200 >> Nicolas Braud-Santoni wrote: >> >>> The main issue I'm running into is that most timing GPS modules will >>> happily

Re: [time-nuts] Choosing a GPS IC for carrier phase measurements

2018-08-19 Thread Nicolas Braud-Santoni
On Sat, Aug 18, 2018 at 10:13:49PM +0200, Magnus Danielson wrote: > >> 2) replace the internal oscillator with one phase locked to your OCXO. > >> [...] > > > > If you go this route, the close in phase noise of your signal needs to be > > in the > > “pretty good TCXO” range. There are indeed

Re: [time-nuts] Choosing a GPS IC for carrier phase measurements

2018-08-19 Thread Nicolas Braud-Santoni
On Sat, Aug 18, 2018 at 08:25:11PM +0200, Attila Kinali wrote: > On Thu, 16 Aug 2018 17:45:30 +0200 > Nicolas Braud-Santoni wrote: > > > The main issue I'm running into is that most timing GPS modules will > > happily give you carrier phase measurements... for their internal > > oscillator, and

Re: [time-nuts] Choosing a GPS IC for carrier phase measurements

2018-08-18 Thread Magnus Danielson
Hi, On 08/18/2018 10:01 PM, Bob kb8tq wrote: > Hi > > > >> On Aug 18, 2018, at 2:25 PM, Attila Kinali wrote: >> >> On Thu, 16 Aug 2018 17:45:30 +0200 >> Nicolas Braud-Santoni wrote: >> >>> The main issue I'm running into is that most timing GPS modules will >>> happily give you carrier phase

Re: [time-nuts] Choosing a GPS IC for carrier phase measurements

2018-08-18 Thread Bob kb8tq
Hi > On Aug 18, 2018, at 2:25 PM, Attila Kinali wrote: > > On Thu, 16 Aug 2018 17:45:30 +0200 > Nicolas Braud-Santoni wrote: > >> The main issue I'm running into is that most timing GPS modules will >> happily give you carrier phase measurements... for their internal >> oscillator, and the

[time-nuts] Choosing a GPS IC for carrier phase measurements

2018-08-16 Thread Nicolas Braud-Santoni
Hi, I've been working on a self-designed GPSDO (on and off for the last couple of years now), and while I got it working decently well, I've been thinking about using GPS carrier phase measurements for better accuracy. The main issue I'm running into is that most timing GPS modules will happily