folkert writes:
> I thought I understood just enough from electronics to be able to these
> kind of experiments but apparently not (3 damaged rpi's and gps
> modules).
For a long time I used a HP1301 with relay boards to do stuff like that,
worked a treat, althought it soaked up a lot of
That reminds me; Used to have a TWTT link via satellite watching a Caesium
at an English Gov site. Was puzzled to watch the relative freq cycle day
and night until we learned the UKGOV site room at nit and day different
temperature control settings. 1 UK Cs vs. our 3 Cs and ulta pure flywheel.
Hello all —
I am working on several broadcast radio projects that require a local PTP
server at multiple locations. The purpose of PTP in this context is to
timestamp audio and related control data. The timestamps ensure proper
reassembly at distant locations after transfer over public/priva
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 Debia
Hi,
I thought I understood just enough from electronics to be able to these
kind of experiments but apparently not (3 damaged rpi's and gps
modules).
I thought that if signal levels are in range of the device that will
read them and all grounds are connected, that you could safely for
example con
Hi
I would strongly suggest that with NTP “more is better”. Three reference devices
is about the minimum. Five is a good target to aim for. Each approach to a
device
has its weak points (cost may be one of them). In a “get what you pay for”
world,
having a couple of “real” commercial boxes in th
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 Tue
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
> se
> 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 ev
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 fol
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 deve
Another option would be a Meinberg NTP appliance.
https://www.meinbergglobal.com/
I have implemented a couple (for geographically dispersed data centres) of the
Meinberg LANtime M300 about 10'years back. They still run without a hitch, and
have done so without ever failing. "Ours" are dual radi
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