>thanks. We aren't looking for performance extremes... Would it be >reasonable to get an accuracy within several seconds, feeding sntp >clients on a lan from an sntp server which itself was fed from an NTP >server on the net? Assuming a local clock which is nominally 60 ticks >per second? And assuming the polls on both ends could be done often >enough to account for local clock drifts?
That depends on how often you poll and how much your clock drifts. "several seconds" is a long time relative to round-trip delays to a nearby time server. Let's ignore those delays for now. Several PCs I have access to are off by slighly more than 100 ppm. There are 86K seconds per day. Call it 100K. So a crystal error of 10 ppm would turn into a clock error of one second per day. So you would have to poll 10 times per day - once every 2 hours. Back to network delays. Does your link to the outside world get overloaded at times? That may confuse things. -- The suespammers.org mail server is located in California. So are all my other mailboxes. Please do not send unsolicited bulk e-mail or unsolicited commercial e-mail to my suespammers.org address or any of my other addresses. These are my opinions, not necessarily my employer's. I hate spam. _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
