Note: If Auto is chosen as the format group, the format will automatically
be Auto-detect. SecureSync will attempt to identify the format of the
incoming ASCII message.
Offset: Provides the ability to account for ASCII input cable delays or other latencies
in the ASCII input. The Offset value is entered and displayed in nanoseconds (ns).
The available Offset range is –500 to +500 ms.
Timescale: Used to select the time base for the incoming ASCII time code data. The
entered Timescale is used by the system to convert the time in the incoming ASCII
data stream to UTC time for use by the System Time. The available choices are:
UTC: Coordinated Universal Time ("temps universel coordonné"), also
referred to as ZULU time
TAI: Temps Atomique International
GPS: The raw GPS time as transmitted by the GNSS satellites (as of 15-Febru-
ary-2021, this is 18 seconds ahead of UTC time)
A local clock set up through the Time Management Page: This option will
appear under the name of the local clock you have set up. Refer to "The Time
Management Screen" on page166 for more information on how to configure
and read the System Time. Local timescale allows a Local Clock to apply a
time offset for Time Zone and DST correction.
The incoming input time information may be provided as local time, but Sys-
tem 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. See for more
information on Local Clocks.
Note: The Timescale of the ASCII input (as configured in the ASCII
time source) must be set correctly, especially if other input ref-
erences are enabled. Failure to configure the Timescale of the ASCII
input correctly could result in time jumps occurring in the System
Time when input reference changes occur. These time jumps could
affect NTP and normal operation of the system.
PPS Source – choices are:
144
CHAPTER 2 • SecureSync 2400 User Manual Rev. 2
2.19 Configuring Input References
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