Note: If Auto is chosen as the format group, the format will auto-
matically 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
22-August-2023, 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 page186 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 cor-
rection.
The incoming input time information may be provided as local time,
but System Time may be configured as UTC time, so internal com-
putations 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 references 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 sys-
tem.
2.19 Configuring Input References
CHAPTER 2 • SecureSync 2400 User Manual Rev. 5.2
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