Spectracom SecureSync User Reference Manual page 380

5.4 Time Code Option Cards
The incoming input time information may be provided as local time, but System Time may be con-
figured 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. Refer to "Setting up a
Local Clock" on page 175 for more information on Local Clocks.
Reference Selection : Indicates which TOD signal is used for synchronization. This will be
either TOD 1 or TOD 2.
Under Time of Day Inputs :
Format : The user-selectable format being used. Available formats include:
Electrical Type : Either RS-485 or TTL (supporting up to 10 V levels) signal lines.
Time Scale : The desired time scale (UTC, TAI, GPS, or Local). See above for information
about time scales.
Offset : Provides the ability to account for STANAG Line (TOD1 and TOD2 independently)
cable delays or other latencies in the STANAG input. Available Offset range is –500 to
+500 ms in 5ns steps.
Stanag TFOM : The Time Figure of Merit for the input.
Under 1PPS Input :
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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: Refer to "The Time Man-
agement Screen" on page 168 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.
STANAG 4246 HAVE QUICK I
STANAG 4246 HAVE QUICK II
STANAG 4372 HAVE QUICK IIA
STANAG 4430 Extended HAVE QUICK
STANAG 4430 Standard Time Message (STM)
ICD-GPS-060A BCD Time Code
ICD-GPS-060A HAVE QUICK
DOD-STD-1399 BCD Time Code
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