Hi
Against NTP, I noticed no measurable drift over the years that the clock
ran for. It did have problems with the back up PSU which made the clock
unreliable if it was powered down for too long. I never compared with
GPS. The main comparison was against UK mains stability. In the short
term there was noticeable differences but UK mains frequency is
manipulated so in the long term it is dead on 50Hz so synchronous
clocks stay accurate.
The DS3232 is a fantastic chip and my choice also for clocks not linked
to NTP or GPS.
Grahame
On 19/04/2021 21:05, gregebert wrote:
Grahame - Have you been able to detect any drift/inaccuracy of the
Rubidium timebase ? I would imagine that even comparing to GPS it
would take months, and perhaps years, to notice any drift.
I was really surprised to see that a DS3232 in one of my devices
worked out to be 6e-7 after 6 years.
On Monday, April 19, 2021 at 11:53:52 AM UTC-7 Sgitheach wrote:
Chuck
I'm happy to help you...
Start here and come back to me with any questions you have.
http://www.sgitheach.org.uk/atomic.html
<http://www.sgitheach.org.uk/atomic.html>
Grahame
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