> -Original Message-
> From: time-nuts [mailto:time-nuts-boun...@lists.febo.com] On Behalf Of
> Richard (Rick) Karlquist
> Sent: Sunday, September 02, 2018 6:12 PM
> To: Discussion of precise time and frequency measurement; Forrest
Christian
> (List Account)
> Subject: Re: [time-nuts]
I'm trying to fill in some gaps in my knowledge about PLL's, GPSDO's, etc.,
with the goal to eventually implement some of these either in a
microcontroller or fpga or some combination thereof.
My problem is that the resources I've found either are very basic -
oriented toward just the high level
Hi Magnus,
Could you please give us some idea of the magnitude of these effects?
Even if just whether we are talking about nano, pico, or femtoseconds?
Thank you,
Peter
On 2 September 2018 at 12:17, Magnus Danielson
wrote:
> Hi Gerhard,
>
> I see that this became a
I haven't seen that app in a long time! I got them to add the option to
include a custom NTP server. Great people!
On my Android phone I use ClockSync <
https://play.google.com/store/apps/details?id=ru.org.amip.ClockSync>. It
has a ton of features especially if your phone is rooted.
--
Ryan
Question:
Supposing you buy a bundle of a couple of dozen fibers inside one outer
jacket: Can
anyone give me an idea of how well the individual fibers are likely to be
matched in
delay, and in delay tempco?
Dana
On Sun, Sep 2, 2018 at 1:46 PM Poul-Henning Kamp wrote:
>
>
> In
Hi Didier,
Many thanks! Much appreciated!
It's indeed a process which comes with requirements. Turns out I have
done quite a bit of things in my professional career that makes me
distinguish myself sufficiently. To be honest, some of the stuff on my
CV looks very strange, but it strangely enough
In message , Bob kb8tq writes:
> That’s why they design a certain amount of “slack” into the structure.
As far as I know, thermal expansion and contact losses are far
bigger dimensioning factors, except for a few very active fault-lines.
At these fault-lines and/or with very important
Hi
Motion at a fault line can be a bit chaotic. As that motion stretches (or stops
stretching)
the cable the delay is likely to change. How much does it change? no idea. If
vibration
messes with it, stretch should as well.
Hopefully the fiber “spiralt” inside the outer jacket is enough to
Hi Paul,
Many thanks! Much appreciated!
I'm committed to this field, and I try to share as much knowledge and
insight I managed to gather, as I have picked up a lot from this list
alone, but also in my strive to find answers to questions we all had.
Now, the Senior Membership of IEEE is not
Magnus
Congratulations on becoming a Senior member of the IEEE.
Thank you for your help over time.
Regards
Paul
WB8TSL
On Sat, Sep 1, 2018 at 7:23 AM, Didier Juges wrote:
> Congratulations Magnus, a well deserved reward for your contributions. My
> boss is a Senior Member and I know they do not
Why should there be a variation in the fiber's delay across an active
fault line? The fiber could only break at the fault line, lay down
more fiber than needed, to compensate the movement, and the delay
doesn't change.
On Sun, Sep 2, 2018 at 4:51 PM Bob kb8tq wrote:
>
> Hi
>
> Tidal effects can
Hi
Tidal effects can be very “non linear” as you approach a coast line. Lots of
change
over a fairly short distance. If indeed the world decides to put in a global
PTTI fiber
system, all of this would get into the mix on some links. It appears that the
existing
technology would handle the
Hi
The referenced line item is $6.8 million a year. It is still very much unclear
if that is just WWV(H)
(from the reference it must include them) or if it also includes WWWVB.
Without any clarification,
we are only guessing about WWVB. Given the way the budget process works,
there’s never a
Hi,
There are LF receivers available commercially today. See links below for one
vendor.
https://www.meinbergglobal.com/english/products/pci-express-dcf77-clock.htm
and even an USB version for the NIST signal.
https://www.meinbergglobal.com/english/products/usb-wwvb-clock.htm
And there
> I suspect there’s a longer list of “slow” environmental effects that are also
> taken
> care of with the compensation setup. One would guess that crossing a active
> fault line would be “interesting”.
Yes, here's a back of the envelope calculation for you:
- the Pacific Northwest moves on
Does any one know what the line item $$$ amount is for the WWV/WWVB
operating budget?
-DC
NR1DX
manu...@artekmanuals.com
On 9/1/2018 11:59 PM, Peter Laws wrote:
On Sat, Sep 1, 2018 at 7:25 PM Bob kb8tq wrote:
I most certainly *have* seen an NTP server that ran off of WWVB and relayed
the
Hi
> On Sep 2, 2018, at 7:17 AM, Magnus Danielson
> wrote:
>
> Hi Gerhard,
>
> I see that this became a separate thread.
>
> On 09/02/2018 01:38 AM, Gerhard Hoffmann wrote:
>>
>>
>> Am 01.09.2018 um 20:40 schrieb Magnus Danielson:
>>> One should first know that there is a lot of papers now
Scott McGrath
I am an amateur radio operator (62 years), and I have accurate 1 PPS and 10 MHz
available. I also coordinate emergency communications for this very large
county.
I use WWV:
To judge propagation during normal and other than normal times
To set clocks after a power outage
I believe someone mentioned a cell phone "time" app. This is an image of
the one I use for my iPhone. It is Emerald Sequoia.
It queries correct time requests from four different NTP servers then picks
the one with the least amount of response delay I believe.
Of course when I'm out setting
Hi Gerhard,
I see that this became a separate thread.
On 09/02/2018 01:38 AM, Gerhard Hoffmann wrote:
>
>
> Am 01.09.2018 um 20:40 schrieb Magnus Danielson:
>> One should first know that there is a lot of papers now on frequency
>> transfer over fiber. The stability achieved on the best ones
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