[ntp:questions] Questions about joining pool.ntp.org

Chris Albertson albertson.chris at gmail.com
Tue Aug 30 01:59:00 UTC 2011

On Mon, Aug 29, 2011 at 4:10 PM, John Hasler <jhasler at newsguy.com> wrote:

> NPG writes:
> > A Meinberg with GPS & WVV would be cool.
> WWVB would give you substantially better accuracy than WWV (though not
> nearly as good as GPS).

One big problem with WWVB is that you can't receive it most of the day.
 Much easier to get at night.   WWV is slightly easier to get but still it's
not a 24x7 signal you will likely need to switch frequency based on
propagation.   To use any of these radio signals yu will need a very stable
local oscillator to fill in during the times f the day when there is no

I live in California and I can only get WWVB (broadcaste from Colorado)
after about midnight and before sunrise. But that is with a 4" loopstick
antenna.  A larger loop antenna might better especially if you could locate
it outdoors far from a building or power lines.

The other source of time is CDMA.   This is a signal sent from cell towers.
 This can be better then WWV/WWVB.     There are many CDMA based NTP
servers.  Some pool servrs are CDMA but I bet you will not find any WWV
based servers

Chris Albertson
Redondo Beach, California

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