Safran SecureSync 2400 User Manual page 463

It is recommended that the SecureSync administrator/operator only use this if
they do not know what the IRIG Input Format is, and they wish to identify the sig-
nal type, or to determine if a signal is present.
Local Clock: The incoming IRIG input time information may be provided as
local time, but System Time may be configured as UTC time, so internal
computations need to be performed. With the Timescale field set to
"Local", select the name of a previously created Local Clock. The Time Zone
and DST rules, as configured in the Local Clock will be applied to the front
panel time display.
Offset: Provides the ability to account for IRIG cable delays or other laten-
cies in the IRIG input. The Offset value is entered and displayed in nano-
seconds (ns). The available Offset range is -500 to +500 ms.
Configuring the IRIG Input Year
The IRIG time source may be able to provide SecureSync with the current year
information via the IRIG input data stream. As the year value is not a required
field in the IRIG data stream, (and if the year value is present, it may not always be
in the same location of the Control Field), if the year value is contained in the con-
trol field section of the IRIG data stream, the control field "layout" needs to be
defined in SecureSync (as determined by the Coded Expressions and Control
Field values). If the year value is not present in the IRIG input signal, the year
value will need to be manually set in SecureSync when using IRIG input as the
only input Time reference.
Note:
and a user-defined value is used.
Note:
and a user-defined value is used. Make sure the year is set correctly
when the SecureSync is installed. If the year is not set correctly
before NTP achieves time synchronization, it will use the value
entered. The unit will also default to the year entered if it is powered
down during the rollover of the year. If the SecureSync was not
switched on during the rollover, this value must be updated.
SecureSync 2400 User Manual
By default, the "year" fields in the IRIG message are ignored
By default, the "year" fields in the IRIG message are ignored
APPENDIX
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