This article is written to address these questions and to provide some system design guidelines. Unfortunately generic RTC's are frequently inadequate for the task at hand.
Drift rates are very sensitive to temperature variations -i.e.
There is no provision to automatically set the RTC to standard time. There is no provision to synchronize two or mom computers. Imbedded bus level modules provide time data within the processor that overcomes these limitations. These modules continually decode an externally applied timing signal. If these signals, termed dm code, are derived from Tune Standard receivers, the system can be maintained 'locked' to the primary time standard.