[time-nuts] Re: NTP servers

Am 23.11.21 um 11:53 schrieb Avamander: Speaking of Raspberry Pi's as time servers, does anyone here know of a nice single board computer that supports both Ethernet hardware timestamping and GPIO PPS input? It seems the BeagleBoneBlack fits the bill. I like it because it runs a normal

[time-nuts] Re: NTP servers

RPI does allow GPIO PPS input Also the RPI4 does PTP. On Tue, Nov 23, 2021 at 12:53:02PM +0200, Avamander wrote: > Speaking of Raspberry Pi's as time servers, does anyone here know of a nice > single board computer that supports both Ethernet hardware timestamping and > GPIO PPS input? > > On

[time-nuts] Re: NTP servers

Speaking of Raspberry Pi's as time servers, does anyone here know of a nice single board computer that supports both Ethernet hardware timestamping and GPIO PPS input? On Tue, Nov 23, 2021 at 12:49 PM McFail Troll wrote: > > If you have a good local NTP setup, you can measure how good other >

[time-nuts] Re: NTP servers

> If you have a good local NTP setup, you can measure how good other servers are, or more likely how good the network connection is. NTP assumes the network delays are symmetric. Often, that's not true. So "how good" turns into measuring network (a)symmetries. Yes this is what I'd like to do

[time-nuts] Re: NTP servers

Thanks I will definitely take a look. On Mon, Nov 22, 2021 at 4:47 AM David Taylor via time-nuts < time-nuts@lists.febo.com> wrote: > On 22/11/2021 02:29, McFail Troll wrote: > > Hi all, I am new to the mailing list, and pretty new to timing stuff in > > general. I wanted to ask if any of you

[time-nuts] Re: NTP servers

Thanks! The TimeHat looks like a good option considering the price. I am trying to do a Raspberry pi + gps project myself, but will possibly end up getting one of those in the future. On Sun, Nov 21, 2021 at 9:52 PM W7SLS wrote: > Welcome, and here are a few thoughts: > > One of the members

[time-nuts] Re: NTP servers

Strange. I have three of these that I have tracked pretty closely for several years. To my knowledge, I’ve never experienced any circumstance in which they were off by one or more seconds. Regarding the holdover behavior, I have not tested that. But if you believe that the current behavior

[time-nuts] Re: NTP servers

ussion of precise time and frequency measurement > Cc: Denny Page > Subject: [time-nuts] Re: NTP servers > > Well, someone snatched that up quick. > > > > On Nov 21, 2021, at 19:11, Denny Page via time-nuts > wrote: > > > > Highly recommend the LeoNTP.

[time-nuts] Re: NTP servers

cell:  +1-876-456-8898 -Original Message- From: Denny Page via time-nuts [mailto:time-nuts@lists.febo.com] Sent: Monday, November 22, 2021 12:16 PM To: Discussion of precise time and frequency measurement Cc: Denny Page Subject: [time-nuts] Re: NTP servers Well, someone snatched

[time-nuts] Re: NTP servers

Well, someone snatched that up quick. > On Nov 21, 2021, at 19:11, Denny Page via time-nuts > wrote: > > Highly recommend the LeoNTP. If you are in the US, there is still one in > stock here: > > https://v3.airspy.us/product/upu-leontp/ > > Denny > >> On Nov 21, 2021, at 18:52, W7SLS

[time-nuts] Re: NTP servers

A couple of years ago, I acquired a related “time-nuts” NTP appliance. As usual, it was not working properly and waited for service time on my electronics workbench. The ESE ES-188 is an NTP referenced Master Clock and Time Code Generator (circa 2007). It displays nine digits (Day of Year,

[time-nuts] Re: NTP servers

GPS with any serial port can be used (along with PPS) for accurate time. You write a routine for a microcontroller that maintains time keeping and clock it from the 1 PPS signal. That gives you correct display of accurate time. You read the NMEA from the GPS and use it to set your registers on

[time-nuts] Re: NTP servers

time.isan...@gmail.com said: > but I am curious to see if I could sync up with some of you guys who seem to > have some pretty cool set-ups. GPS has taken over the time-distribution business. If you want to use GPS, there are 2 ways to go. You can get a simple GPS receiver and plug that into

[time-nuts] Re: NTP servers

On 22/11/2021 02:29, McFail Troll wrote: Hi all, I am new to the mailing list, and pretty new to timing stuff in general. I wanted to ask if any of you folks who have a more advanced set-up (synchronization via gps/radio, or just a well working rubidium clock or something) maintain a solid

[time-nuts] Re: NTP servers

Hi, I am running a very interesting public server, for about 15 years. i386, 32-bit, Linux, on very old hardware with a serial port. Has a GPS (single constellation) device plugged in, about $35. I run gpsd (https://gpsd.io) , and it talks to the NTP servers over SHM, with PPS. When the

[time-nuts] Re: NTP servers

Welcome, and here are a few thoughts: One of the members developed a ’TimeHat’ that sits on top of a Raspberry Pi. GPS and more. I purchased tow of them, and am quite happy with them. https://millerjs.org/timehat Another option is the Leo Bodnar NTP