097-10603-01 Rev. A – November 2004 X72 Desiger’s Reference and User’s Guide 91
X72 1PPS Algorithm Theory of Operation
Calcslope
Figure D-8 X72 Calcslope State
When the frequency difference between the
X72 and the 1PPS source is calculated, if the
difference is < ±3 x E
–9
the state changes
from holdover to JamSynch.
This state executes every 120 seconds
during holdover.