Displaying 4 results from an estimated 4 matches for "cinderblock".
2017 May 24
2
System Time Source
...r
> it is out on the coasts.
>
>
> GPS time is a much better solution, but it?s power-hungry, as you probably
> know from running GPS on your smartphone. This rules it out for laptops.
>
> The GPS transmitters probably have a higher received signal strength than
> WWVB, but cinderblock walls and grids of 42U equipment racks block the GPS
> signal quite well. This is why data centers with such clocks generally
> have to run an antenna to the outside for their clock. That makes it far
> more expensive than just connecting to an upstream NTP server.
>
> > When I...
2017 May 24
11
System Time Source
One of our STEM interns recently observed that there are
inexpensive clocks that sync via radio to standard time
services.? This begged a question about why every computer
would not have a radio module to receive time.? Our senior
staff did not have a good answer or if time from such a
radio module would be supported by the operating system.
When I was a student, such questions would have earned
2017 May 24
0
System Time Source
...l. I can only imagine how much easier it is out on the coasts.
GPS time is a much better solution, but it?s power-hungry, as you probably know from running GPS on your smartphone. This rules it out for laptops.
The GPS transmitters probably have a higher received signal strength than WWVB, but cinderblock walls and grids of 42U equipment racks block the GPS signal quite well. This is why data centers with such clocks generally have to run an antenna to the outside for their clock. That makes it far more expensive than just connecting to an upstream NTP server.
> When I was a student, such ques...
2017 May 24
2
System Time Source
...t it?s power-hungry, as you probably know from running GPS on your smartphone. This rules it out for laptops.
Not exactly; laptop batteries' capacity is an order of magnitude larger
than phone batteries.
> The GPS transmitters probably have a higher received signal strength than WWVB, but cinderblock walls and grids of 42U equipment racks block the GPS signal quite well. This is why data centers with such clocks generally have to run an antenna to the outside for their clock. That makes it far more expensive than just connecting to an upstream NTP server.
No, GPS is lower signal strength tha...