Hi,
Several (many?) years ago National Geographic magazine show a picture taken
here in southern California of the state government sending red laser signals
between different mountain tops to keep track what was going on near fault
lines.
There were no technical details on what was taking place
On Sunday, 1 May 2016 10:52 AM, Bruce Griffiths
wrote:
White Rabbit is open hardware, you are free to build it yourself should you
want to do so. All the relevant VHDL etc is available.There will also be
suitable TDC designs available on the CERN site.You can also integrate these
in
The problem is solved, A German surplus dealer has/had bunch of these
generator, calibrated and with guarantee for less then $ 3000. And in good
shape.
Who wants the old one .. no cost , power supply in trouble , Ulrich
In a message dated 4/15/2016 10:01:56 P.M. Eastern Daylight Time,
I found only preliminary data about these transceivers.
I was meaning for a <2000€ overall solution, does a White Rabbit
implementation fill this requisite ( I couldn't find much information
about its costs)?
Also consider that nodes could be more than three also.
Ilia.
Il 30/04/2016 12:27
Ars Technica just published a piece on leapseconds. There is some interesting
info on what makes the earth a poor clock and our abilities to measure it
(want to smooth it out a bit... cut down all the trees).
http://arstechnica.com/science/2016/04/the-leap-second-because-our-clocks-are-more-acc
Rob,
Take a look at http://www.maxmcarter.com/rubidium/2012_mod/#599
Might be a possible mod.
Bob darby
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Rob Seaman
Sent: Friday, April 29, 2016 7:13 PM
To: Discussion of precise time and frequency measur
There are synchronous free space optical gigabit ethernet links available, it
shouldn't take too much to modify one for White Rabbit.
Bruce
On Saturday, 30 April 2016 10:13 PM, Magnus Danielson
wrote:
Hi,
On 04/29/2016 11:45 PM, Michael Wouters wrote:
> On Sat, Apr 30, 2016 at 6:14 A
On Sat, Apr 30, 2016 at 8:06 AM, Bruce Griffiths
wrote:
> So far I haven't found an existing free space optical implementation of White
> Rabbit.
There are two groups working on that subject that I know of:
Jean-Pierre Aubry [1] and his colleagues in EPFL (Neuchâtel campus, in
Switzerland). The
The free-space implementation of White Rabbit remains to be done.
If you can modulate optical GE over your optical links, then it should
work out fairly well.
Actually, if you get that working, I'm sure they would enjoy seeing a
paper on that in EFTF.
Cheers,
Magnus
On 04/30/2016 08:06 AM,
Hi,
On 04/29/2016 11:45 PM, Michael Wouters wrote:
On Sat, Apr 30, 2016 at 6:14 AM, Magnus Danielson
wrote:
Well, giving the conditions mentioned, doing ranging codes such as those
used by GPS is very easy and cheap. Doing this in bidirectional isn't too
hard. Doing a suitably high chip-rate s
On Sat, Apr 30, 2016 at 6:14 AM, Magnus Danielson
wrote:
> Well, giving the conditions mentioned, doing ranging codes such as those
> used by GPS is very easy and cheap. Doing this in bidirectional isn't too
> hard. Doing a suitably high chip-rate should cost very little.
I've done two-way time-t
White Rabbit would be good in that a suitable TDC design with 1ns resolution
already exists for White Rabbit. This TDC is used in the Tunka valley (near
lake Baikal) Siberian Cherenkov telescope array. Note this TDC uses the SERDES
receiver in the FPGA to implement a serial to parallel converter
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