Use of Time Fault Discrete: There are two options:
Enabled: The TFD input signal is used to validate the STANAG input.
Disabled (default): The TFD input signal is ignored.
Time Fault Discrete State: If this is valid, the indicator will be green. If it is not valid,
the indicator will be orange.
Use of Bit Synchronization (BS): There are two options:
Enabled: The second STANAG input (TOD 2) is used to receive the BS (Bit
Stream) signal used with STANAG 4430-STM. When BS is active, the con-
figuration of TOD2 is superseded and only used for BS.
Disabled: The second STANAG input (TOD 2) can be used to receive an inde-
pendent TOD.
Reference Selection: Indicates which TOD signal is used for synchronization. This
will be either TOD 1 or TOD 2.
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 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 for more information on Local Clocks.
Under Time of Day Inputs:
TOD Format: The user-selectable format being used. Available formats include:
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
Electrical Type: Either RS-485 or TTL (supporting up to 10 V levels) signal lines.
Time Scale: Used to select the time base for the incoming time code data. The
entered Timescale is used by the system to convert the time in the incoming data
432 SecureSync 2400 User Manual
APPENDIX
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