US 9,813,173 B2
Time signal verification and distribution
Shankar V. Achanta, Pullman, WA (US); Srinivas Achanta, Pullman, WA (US); and David E. Whitehead, Pullman, WA (US)
Assigned to Schweitzer Engineering Laboratories, Inc., Pullman, WA (US)
Filed by Schweitzer Engineering Laboratories, Inc., Pullman, WA (US)
Filed on Oct. 5, 2015, as Appl. No. 14/875,453.
Claims priority of provisional application 62/060,465, filed on Oct. 6, 2014.
Prior Publication US 2016/0099803 A1, Apr. 7, 2016
Int. Cl. H04L 7/00 (2006.01); H04J 3/06 (2006.01); H04L 29/06 (2006.01)
CPC H04J 3/0638 (2013.01) [H04J 3/0644 (2013.01); H04L 63/14 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A time signal verification and distribution device, comprising:
a time signal receiver for receiving time signals;
a time input in communication with the time signal receiver, configured to receive from the time signal receiver a first time signal from a first time source and a second time signal from a second time source;
a time signal quality module in communication with the time input, configured to determine a time quality of the first time signal and the second time signal;
a time signal difference module in communication with the time input, configured to calculate a difference between the first time signal and the second time signal, and compare the difference to a predetermined threshold;
a time signal output module in communication with the time signal quality module and the time signal difference module, configured to determine an output time signal based on the comparison and the determined time quality of the first time signal and the second time signal; and
a time signal output in communication with the time signal output module, configured to output the output time signal to a plurality of time signal consuming devices.