Hi The question always is - Am I more likely to loose GPS or loose power?
Other that random bird attacks, a GPS with a proper outdoor antenna is pretty reliable. With a rational indoor antenna and a modern receiver, dropouts are normally brief, if they occur at all. Power has an odd habit of going out soon after bar closing time on Saturday night. If power is out for more than ten or twenty minutes, I have no need for time on the local LAN - the backups on the switches and other gear drop out pretty fast. Bob -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Mark Sims Sent: Monday, April 05, 2010 1:18 PM To: [email protected] Subject: [time-nuts] simple, cheap clock for the local LAN Just use everybody's favorite GPSDO, the Thunderbolt. While it is being disciplined by GPS, it is learning how the oscillator tends to age with time and drift with temperature. If GPS goes away, it will still discipline the oscillator in an "open loop" fashion using its learned behavior. The HP GPSDOs do the same thing. Lady Heather has an option for periodically syncing the system clock to Tbolt Time. At its most agressive setting, it keeps the system clock within a windows timer tick (20-50 msec). _________________________________________________________________ Hotmail is redefining busy with tools for the New Busy. Get more from your inbox. http://www.windowslive.com/campaign/thenewbusy?ocid=PID28326::T:WLMTAGL:ON:W L:en-US:WM_HMP:042010_2 _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
