----- Original Message -----
From: "coggs" <[email protected]>
To: "neonixie-l" <[email protected]>
Sent: Wednesday, November 03, 2010 12:04 PM
Subject: [neonixie-l] Re: Keeping your clock accurate
I used to use a 1 pulse/second signal from a GPS receiver for the
calibration. I then wrote a calibration routine which would start a
counter in a 100hz interrupt service routine. I would count 60 pulses
from the GPS then stop the counter. Then I subtracted the counter from
6000 and that would be the number of clocks I would add or subtract to
per minute for my timekeeping.
Doesn't that give you an inaccuracy of +/- 5ms on your 60 seconds
measurement?
Frank.
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