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???
11/15/03 00:26
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 		 #58746 - RE: Crystal or mains timebase?
Responding to: ???'s previous message
Mains frequency is synchronized with atomic clocks. So, theoretically deviation is zero. But at certain times a day mains net can be switched to different sources. Then, some 100msec can be lost...

Charles could try to implement in his code to switch time base from mains frequency to quartz oscillator, whenever deviation is bigger than +-200ppm. Then, very probably a dip of mains occurs and quartz oscillator time base should be prefered. This could minimize error.

Kai

List of 29 messages in thread
TopicAuthorDate
[OT} Cool clock project.            01/01/70 00:00      
   RE: [OT} Cool clock project.            01/01/70 00:00      
      RE: [OT} Cool clock project.            01/01/70 00:00      
   RE: [OT} Cool clock project.            01/01/70 00:00      
      RE: [OT} Cool clock project.            01/01/70 00:00      
   RE: [OT} Cool clock project.            01/01/70 00:00      
   RE: On Topic Clock Project.            01/01/70 00:00      
   RE: [OT} Cool clock project.            01/01/70 00:00      
      RE: [OT} Cool clock project.            01/01/70 00:00      
      RE: [OT} Cool clock project.            01/01/70 00:00      
         RE: [OT} Cool clock project.            01/01/70 00:00      
            RE: [OT} Cool clock project.            01/01/70 00:00      
               RE: 50/60 Hz Auto-detect            01/01/70 00:00      
         RE: Crystal or mains timebase?            01/01/70 00:00      
            RE: Crystal or mains timebase?            01/01/70 00:00      
               RE: Crystal or mains timebase?            01/01/70 00:00      
   RE: [OT} Cool clock project.            01/01/70 00:00      
   RE: [OT} Cool clock project.            01/01/70 00:00      
      RE: [OT} Cool clock project.            01/01/70 00:00      
   RE: [OT} Cool clock project.            01/01/70 00:00      
      RE: [OT} Cool clock project.            01/01/70 00:00      
         RE: [OT} Cool clock project.            01/01/70 00:00      
            RE: [OT} Cool clock project.            01/01/70 00:00      
               RE: [OT} Cool clock project.            01/01/70 00:00      
                  RE: [OT} Cool clock project.            01/01/70 00:00      
                     RE: [OT} Cool clock project.            01/01/70 00:00      
   RE: [OT} Cool clock project.            01/01/70 00:00      
   RE: [OT} Cool clock project.            01/01/70 00:00      
      RE: [OT} Cool clock project.            01/01/70 00:00      

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