FE-5680A Time Interval Measurements

FE-5680A Time Interval Measurements

Changed the Ref Tek 111A GPS clock to a Ref Tek 111C GPS clock.

Plotted data is a 15 cycle average of the time interval between the rising edge of the 111C 1PPS signal and a 1PPS signal derived from the FR-5680A.

From 2011-12-24 14:46 to 2011-12-27 14:54 (~72 hrs) time interval changed from 94.3 usec to 93.7 usec:
FE-5680A ~ 2.3e-12 fast.

Changed offset count from -176 to -178 at 2011-12-27 15:55.

From 2011-12-27 15:55 to 2011-12-28 13:22 (~22 hrs) time interval changed from 93.7 usec to 93.6 usec:
FE-5680A ~ 1.3E-12 fast.

Changed offset count from -178 to -180 at 2011-12-28 16:18

Starting at 2011-12-28 19:08 plotted data is 100 cycle average of the time interval between the rising edge of the 111C 1PPS signal and a 1PPS signal derived from the FR-5680A.

From 2011-12-28 19:08 to 2011-12-29 09:36 (~14 hrs) time interval changed from 93.53 usec to 93.56 usec:
FE-5680A ~ 5.9E-13 slow.

Changed offset count from -180 to -179 at 2011-12-29 15:37

From 2011-12-31 10:49 to 2012-01-02 19:11 (~56 hrs) time interval changed from 93.53 usec to 93.62 usec:
FE-5680A ~ 4.5E-13 slow.