[ntp:questions] Re: Mother Of All Clocks

Brad Knowles brad at stop.mail-abuse.org
Mon Mar 28 14:29:25 UTC 2005

At 10:32 AM +0000 2005-03-28, Bjorn Gabrielsson wrote:

>>  reception system, which includes a DCF77 correlation receiver (the
>>  german radio time system based on an AM transmitter).
>  Guess you are correlating the phase shift code also present on the
>  DCF77. What accuracy do you get in comparison with just using AM?

	With PZF, it's almost as good as GPS.  See 
<http://www.meinberg.de/english/products/lanpzf.htm>, and 
<http://www.meinberg.de/english/products/lanshs.htm>, for examples.

	I'm guessing that what they've done is take something like the 
LANTIME/SHS server (see 
<http://www.meinberg.de/english/products/lanshs.htm>) and put that 
into a blade configuration, and then plug sixteen of those into a 
blade chassis.

Brad Knowles, <brad at stop.mail-abuse.org>

"Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety."

     -- Benjamin Franklin (1706-1790), reply of the Pennsylvania
     Assembly to the Governor, November 11, 1755

   SAGE member since 1995.  See <http://www.sage.org/> for more info.

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