Spectracom SecureSync 1200 User Reference Manual page 465

Note:
detect. SecureSync will attempt to identify the format of the incoming ASCII mes
sage.
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 avail
able 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 July, 2015,
this is 17 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 Man
agement Screen" on page 140 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 System
Time may be configured as UTC time, so internal computations need to be per
formed. With the Timescale field set to "Local", select the name of a previously cre
ated 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.
SecureSync User Reference Guide
If Auto is chosen as the format group, the format will automatically be Auto-
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 ref
erence changes occur. These time jumps could affect NTP and normal oper
ation of the system.
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