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= LCGT Timing System = = KAGRA Timing System =
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The LCGT timing system will be a dead copy of the advanced LIGO timing system :-) == Reference ==
==== LIGO Documents ====
 * [[https://dcc.ligo.org/cgi-bin/DocDB/ShowDocument?docid=483|Timing System Document Map Advanced LIGO]]
 * [[https://dcc.ligo.org/cgi-bin/DocDB/ShowDocument?docid=485|Quick Start Guide Optical Timing Distribution System Advanced LIGO]]
 * [[https://dcc.ligo.org/cgi-bin/DocDB/ShowDocument?docid=492|Timing Master Module/Fanout Module]]
  * [[https://dcc.ligo.org/cgi-bin/DocDB/ShowDocument?docid=21665|Circuit Schematic]]
 * [[https://dcc.ligo.org/cgi-bin/DocDB/ShowDocument?docid=493|Slave Module]]
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== Functions ==
 * Provides accurate time information to all the stations in the LCGT.
 * The system provides 2^N Hz clock signals synchronized with the GPS seconds.
 * The system also distributes the absolute time information to the DAQ hardwares so that
each sample recorded will be unambiguously associated with an absolute GPS second.

== LIGO Documents ==
 * [[https://dcc.ligo.org/cgi-bin/DocDB/ShowDocument?docid=483|Timing System Document Map Advanced LIGO]]
==== GPS antenna and receiver ====
 * Link to [[LCGT/subgroup/mine|Facility Support]]

KAGRA/Subgroups/DGS/Projects/Timing (last edited 2021-08-11 18:12:00 by shoichi.oshino)