Magnus that is amazing and it seems to be $29. That is hard to believe.
Appreciate you sharing.
Paul
WB8TSL

On Tue, Oct 8, 2024 at 1:24 AM Magnus Danielson via time-nuts <
time-nuts@lists.febo.com> wrote:

Hi Paul,

Yes. I think the presentation on the web leaves a little more to desire,
so I will ask Ahmed to improve that, as I think it should not be too
difficult to achieve.

While many do not have PTP timing in their labs, it is becoming more and
more ubiquious so it is interesing when the entry level is so low. With
this little device you can do your normal TI-counter measurement even
for a PTP source. Exactly how much it filters, add noise and add time
bias, I do not know, yet.

I find it interesting that the PPS is such a common reference
measurement point, it keep showing up in packet timing solutions as a
reference point, including the ITU-T standards.

Cheers,
Magnus

On 2024-10-08 14:57, paul swed wrote:

 
It's unclear if this is a time source (i.e. you've got a grandmaster or such running PTP and sending time, and this widget receives it and puts out 1pps.  Or can it be a sender - I cobble up a bunch of stuff from my collection of masers and fountain clocks in my underground lair, and I can send that highly accurate tick to the rest of the (connected by cabled ethernet) world?

beaks out 1pps is ambiguous

On Wed, 9 Oct 2024 05:05:12 +0200, Magnus Danielson via time-nuts time-nuts@lists.febo.com wrote:

Hi Paul,

Yes. I think the presentation on the web leaves a little more to desire,
so I will ask Ahmed to improve that, as I think it should not be too
difficult to achieve.

While many do not have PTP timing in their labs, it is becoming more and
more ubiquious so it is interesing when the entry level is so low. With
this little device you can do your normal TI-counter measurement even
for a PTP source. Exactly how much it filters, add noise and add time
bias, I do not know, yet.

I find it interesting that the PPS is such a common reference
measurement point, it keep showing up in packet timing solutions as a
reference point, including the ITU-T standards.

Cheers,
Magnus

On 2024-10-08 14:57, paul swed wrote:

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Won't the USB between the host and the Ethernet side of the TimeStick limit
accuracy to a few microseconds at best?

If the goal is to distribute accurate PPS won't boundary clocks be needed?

The TimeStick will be great for experimenters, though.

On Thu, Oct 10, 2024 at 7:26 PM Jim Lux via time-nuts <
time-nuts@lists.febo.com> wrote:

It seems to me that the raspberry pi compute module 4 uses an Ethernet chip that supports PTP and that the carrier board broke out one pin and you could choose input or output.

If this module doesn’t support an input pin for PTP, there are other options.

From: Steven Sommars via time-nuts time-nuts@lists.febo.com
Sent: Thursday, October 10, 2024 8:47:33 PM
To: Discussion of precise time and frequency measurement time-nuts@lists.febo.com
Cc: Steven Sommars stevesommarsntp@gmail.com
Subject: [time-nuts] Re: TimeStick

Won't the USB between the host and the Ethernet side of the TimeStick limit
accuracy to a few microseconds at best?

If the goal is to distribute accurate PPS won't boundary clocks be needed?

The TimeStick will be great for experimenters, though.

On Thu, Oct 10, 2024 at 7:26 PM Jim Lux via time-nuts <
time-nuts@lists.febo.com> wrote:

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To unsubscribe send an email to time-nuts-leave@lists.febo.com

...and the ASIX website disappeared on Wednesday at 9 (CEST)...

On Fri, Oct 11, 2024 at 7:23 AM Ed Marciniak via time-nuts <
time-nuts@lists.febo.com> wrote:

I found the schematic out there.  it's a 1pps output.

On Thu, 10 Oct 2024 20:01:02 -0400, Jim Lux via time-nuts time-nuts@lists.febo.com wrote:

 
It's unclear if this is a time source (i.e. you've got a grandmaster or such running PTP and sending time, and this widget receives it and puts out 1pps.  Or can it be a sender - I cobble up a bunch of stuff from my collection of masers and fountain clocks in my underground lair, and I can send that highly accurate tick to the rest of the (connected by cabled ethernet) world?

beaks out 1pps is ambiguous

On Wed, 9 Oct 2024 05:05:12 +0200, Magnus Danielson via time-nuts  wrote:

Hi Paul,

Yes. I think the presentation on the web leaves a little more to desire,
so I will ask Ahmed to improve that, as I think it should not be too
difficult to achieve.

While many do not have PTP timing in their labs, it is becoming more and
more ubiquious so it is interesing when the entry level is so low. With
this little device you can do your normal TI-counter measurement even
for a PTP source. Exactly how much it filters, add noise and add time
bias, I do not know, yet.

I find it interesting that the PPS is such a common reference
measurement point, it keep showing up in packet timing solutions as a
reference point, including the ITU-T standards.

Cheers,
Magnus

On 2024-10-08 14:57, paul swed wrote:

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