mafl...@theflynn.org said:
I am working on a project where I need to transfer 1PPS approximately 120
meters between buildings.I cam borrow a pair of 62.5 fibers from IT/
telco to do so.
Google for fiber IRIG gets plenty of hits.
Raw PPS is a nasty case for fibers. You need some sort
Hi
There are indeed modules that will move a pps over fiber. They are not cheap.
They also are not real good bang for the buck if you need millisecond level
timing. Without guidance on what we are trying to do here it’s very tough to
come up with much. NTP over a symmetrical route will indeed
I am working on a project where I need to transfer 1PPS approximately
120 meters between buildings.I cam borrow a pair of 62.5 fibers from
IT/telco to do so.
Playing cost / performance against one another, I am looking for a
solution somewhere in the middle that does not requires SM-28
Hi Chris,
Timing source is a SyncServer 200 with the rubidium option.The
inter-building fiber is already budgeted as part of the IT and telecom
portion of the project. It adds no cost to the project to use it other
then the optical transceivers.
That is where i need help - selecting
Hi
Is $1K to much for the budget or is $200K?
Are you after microseconds, nanoseconds, or picoseconds?
Depending on what you are after, the range of “in the middle of the pack” moves
around quite a bit.
Bob
On Jul 13, 2014, at 1:39 PM, Martin A Flynn mafl...@theflynn.org wrote:
Hi Chris,
What accuracy requirements do you have. This could be easy or impossible.
Don't spend to much money distributing 1PPS because you can have it
any place you want for the cost of a GPS receiver. A second GPS
receiver is likely cheaper than the cost of 120 meters of cable plus
the cable drivers
What accuracy requirements do you have?Do you have a requirement
to measure and test your installation? Testing likely means you will
have to round trip the signal. The round trip doubles the cost but
I don't see how to avoid it unless you already have accurate time at
both ends and if you
Hi
IRIG A20 (manchester code) or even A10 (DC level shift) should drive a
transmitter directly or you could use an AM carrier, A13 is 10kHz, A14
100kHz or A15 1MHz.
LuxLink sell off-the shelf solutions, see
http://www.luxlink.com/products/irig.htm
or SEL will do duplex data plus IRIG B over a two
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