ska phase 1 system requirements specification - The Square ...

WP2‐005.030.000‐SRS‐002Revision : BIdent Requirement Applicability Parent VerificationSYS_REQ_8130Central facility UPS. The powersource to the central facility shallhave back‐up provisions forcontrolled shut‐down (TBC).TBD6.1.2 Data synchronizationIdent Requirement Applicability Parent VerificationSYS_REQ_8140Subsystem time standard. EachSKA1 AA or dish system shallmaintain an internal timestandard with an accuracy of TBDnanosecondsTBDIdent Requirement Applicability Parent VerificationSYS_REQ_8150Central time standard. All SKA1subsystems shall synchronizetheir internal time standards tothe central timing standard withan accuracy of TBD nanoseconds.TBD6.2 Internal Interfaces6.2.1 PowerIdent Requirement Applicability Parent VerificationSYS_REQ_8160Limiting excessive currents. SKA1equipment circuitry shall beprotected against excessivecurrents by a current limitingdevice, which shall not itselfproduce excessive currents.TBDIdent Requirement Applicability Parent VerificationSYS_REQ_8170Power surge protection. SKA1sub‐systems shall be protectedagainst power transients andsurges.TBD2011‐02‐14 Page 54 of 58