On 08/06/2012 01:27 AM, Bob Camp wrote: > Hi > > If the OCXO is off by 200 ppb, it will slip time by 200 ns per second. > > It will be off by a *lot* more than 200 ns at the end of a year. Compared to the spec's on a cell tower OCXO, 200 ppb per year isn't very good... Many cell applications require 50 ppb. Cheers, Magnus