KAGRA Timing System

Note of the Meeting with Zsuzsa (Jul 15, 2016 at Columbia University)

You may not want more IRIG-B boards because there is Dsub output on the back of IRIG-B board with which we can convert to BNC to use more outputs.
It's better to connect two GPS antennas to Master board so that one can be used when the other signal is lost.
In the master board, VCXO is not available in the market anymore. However Szusza has spares.
In the comparator board, there is one chip which gets very hot. Make sure to cool it down.
Check if the leap second is correctly compensated in the oldest IRIG-B (one arrived on 5/7/2012, installed in the front room). iKAGRA timing might have been off 1 sec!