[time-nuts] Name That Rb Frequency Standard
brooke at pacific.net
Tue Jun 12 10:11:44 EDT 2007
Came across US patent 4,899,117 "High Accuracy Frequency Standard and Clock
Sytem" by John Vig, Feb. 6, 1990.
In the background section he says:
"For example, in one of the most popular Rubidium frequency standards on the
market, the manufacturer provides a C-field adjustment range equivalent to
+1.5E-9. The aging rate of the standard is specified as 2E-10/year.
Consequently, at the specified aging rate, the limited C-field adjustment range
limits the useful life of this Rubidium frequency standard to 1.5E-9/2E-10 or
Which standard is he reffering to?
More information about the time-nuts