On 2011-07-07, Chris Albertson <[email protected]> wrote: > On Thu, Jul 7, 2011 at 12:12 AM, Terje Mathisen <"terje.mathisen at > tmsw.no"@ntp.org> wrote: >> Chris Albertson wrote: > >> Using Garmin 18 and SURE for two of those will leave you nearly $900 for the >> last clock, so that is obviously doable. :-) >> >> If you pick up a Motorola Oncore UT+ as the last clock you'll have a proven >> extremely good reference (15-25 ns RMS offset from true UTC?) and still end >> up with maybe $800 in your pocket. > > > If this is a hobby server running in your house then you can get buy by?^^^ > with just some bare PCBs on a table. But these are critical business If you want to put them into a box to make them look better, go ahead. That adds an extra $10 to the price.
> servers so I assume the OP runs a business and needs to follow the > electrical code and can let an antenna lead go out an open window. He can just put the antenna in the inside of the window. I have done this with the sure, and get adequate signals to run the time. > The biggest part of the budget wil be the roof mounted antenna. For And why is he roof mounting it? > that you need a mast that is grounded to a ground rod. You need some Just put it on a plate flat on the roof. Why put it on a mast? > kind of lightening protection on the antenna lead and then to lead the > antenna coax in the lab. Getting just a legal up to code antenna up > for $300 is a stretch if you hire the work done. There is a LOT > more to setting up a GPS in a commercial building then just buying the > GPS. It gets expensive quickly once you start placing things on a > roof and pulling wires between floors > > Chris Albertson > Redondo Beach, California _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
