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Old 02-19-2014, 10:18 PM   #16
sgosnell
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There are any number of software packages that can set your computer time from a GPS. Any GPS you can connect to your computer will be fine. There are many available, both USB and bluetooth. Just buy whichever suits your fancy, they all work the same way. If you choose a bluetooth GPS, you'll obviously need bluetooth capability on your server, and that can be done with a cheap dongle.

Having a GPS receiver is the next best thing to having your own atomic clock, because the receiver gets the time from several atomic clocks, all synchronized precisely. The only signals the receiver gets are the time, and it calculates a position based on the difference in the time it takes for the signals from different satellites to reach it. The GPS system needs such precise time that the effects of relativity caused by the speed of the satellites, and the lack of gravity affecting them, have to be considered. Calculating a position to within 3 meters requires knowing the time within microseconds. Using GPS will give you the most precision available for the time, if you really need it to that precision. I don't need it, but I set the time on my Android phone using the internal GPS receiver and software. Just because I can.
 
Old 02-20-2014, 02:52 AM   #17
TenTenths
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Quote:
Originally Posted by Mig21 View Post
I've been struggling to find how I can make my server's time more accurate.
More accurate in reference to WHAT?

Quote:
Originally Posted by Mig21 View Post
And even if I can't have my own, can someone suggest a USB radio or GPS clock that's likely to work indoors (in Canada)?
Two minutes on Google turned up this:


http://www.atomictimeclock.com/radsynhome.htm


Or why not get this baby where you can put the GPS antenna up to 1Km away from the server!


http://www.ntp-time-server.com/atomi...mic-clock.html
 
Old 02-20-2014, 10:29 AM   #18
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If you are going to use radio, just get a shortwave radio (cheaper than $200), tune in, plug it into the microphone jack and write / find a program to distinguish the beeps and set the time.
 
Old 02-20-2014, 03:00 PM   #19
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$30 should get you an Oregon atomic clock.
 
Old 02-20-2014, 03:18 PM   #20
273
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For completeness, there are people buiding things with these:
http://www1.symmetricom.com/csac/?pr...FYUIwwodxAoAHA
(first hit on google).
There is a company somewhere making wristwatches with similar.
 
Old 02-21-2014, 05:11 PM   #21
jefro
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Cool.
 
Old 02-21-2014, 05:49 PM   #22
metaschima
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Quote:
Originally Posted by 273 View Post
For completeness, there are people buiding things with these:
http://www1.symmetricom.com/csac/?pr...FYUIwwodxAoAHA
(first hit on google).
There is a company somewhere making wristwatches with similar.
Here's something I've noticed, if there's a "get a quote" button or if they don't list the price ... you can't afford it

I could be wrong tho...
 
Old 02-21-2014, 05:51 PM   #23
273
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Quote:
Originally Posted by metaschima View Post
Here's something I've noticed, if there's a "get a quote" button or if they don't list the price ... you can't afford it

I could be wrong tho...
I think you're most probably right. The watches based upon similar technology are apparently $12,000 or so.
 
Old 02-22-2014, 09:21 AM   #24
gotfw
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Quote:
Originally Posted by metaschima View Post
Here's something I've noticed, if there's a "get a quote" button or if they don't list the price ... you can't afford it

I could be wrong tho...
Yep, could be. It depends, as it may indicate a better, more competitive, price. Resellers often must sign/agree to contracts which contain a "Minimum Advertised Price", a.k.a. "MAP". This is the lowest price they can _advertise_ on the web, print ads, etc. They are, however, still free to _sell_ it for less. Hence "call for quote" or "add to basket" before these below MAP prices can be revealed.
 
  


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