Microsemi SyncSystem 4380A - Setting the System Time Manually; Force Time; External Reference

DOC 4380A
4380A O & M Manual
28
098-00723-000– Jul 2017 Revision 4.0 SyncSystem 4380A O&M Manual
CAUTION
Users should allow the external frequency reference to free run and should not manually enter
corrections/adjustments into the clock. The 4380A characterizes the clock’s frequency relative to GPS and
manual/user adjustment of the clock frequency may cause the 4380A outputs to not meet specification
following the adjustment.
Les utilisateurs devraient permettre la référence externe de fréquence à élevé en plein air et ne devraient pas
manuellement écrire des corrections/ajustements dans l'horloge. Le 4380A caractérise la fréquence de base
à GPS relatif et l'ajustement de manuel/utilisateur de la fréquence de base peut faire ne pas répondre les
sorties 4380A à des spécifications suivant l'ajustement.
After replacing an external frequency reference, the restart –cold command must be executed on the 4380A
by the operator to reset the KAS2 steering algorithm. If not, the 4380A outputs may not remain within
specifications and it could take up to 9 days for the system to provide outputs within specifications.
Après remplacement d'une référence externe de fréquence, le relancement - la commande froide doit être
exécutée sur le 4380A par l'opérateur pour remettre à zéro l'algorithme de la direction KAS2. Sinon, les
sorties 4380A peuvent ne pas demeurer selon des caractéristiques et il pourrait prendre à 9 jours pour que le
système fournisse des sorties selon des caractéristiques.
2.9 Setting the System Time Manually
The 4380A is capable of operating without the GPS Receiver and maintains system time through several
methods
2.9.1 Force Time
The force_time command has several options and users have the flexibility of choosing the method(s) that
will work best based on installation and system architecture. Once the command has been successfully
completed, NTP will lock to the new system time and the unit will enable the outputs.
 Default – Sets the system time to 01 Jan 2012 00:00:00
 Now – Sets the system time to the operating systems time.
 Date/Time – Allows the user to specify the date and time in the yyyy-mm-dd-hh:mm:ss format
 NTP – The system obtains the time from an NTP Server and sets the system time.
 IRIG – The system obtains the time from an IRIG Time source and sets the system time. If the
time code selected from the irig_input command does not provide the year, the user must specify
the year on the command line.
If for any reason the system is unable to successfully set the system time it will report an error. The
force_time command will not work unless the steer_source is set to manual.
2.9.2 External Reference
When setting the time manually, it is recommended users provide a 1PPS and 10MHz. Users can select the
proper clock type for the 10MHz input using the reference_type command and then switching to reference
external when the system is properly set up. Users will need to edit the node.cfg file to use one or more
1PPS references from the 4393A Card as a steer source.