Under General Settings:
Level of Single-ended Signals: 10V or 5V can be selected for the TOD 1 and 1PPS
Output.
Generate Time Fault Discrete (TFD):
Enabled: The TFD signal uses the “Threshold to activate” value to provide the
level of TFD.
Disabled: The TFD signal is always valid.
Threshold to activate TFD: If the TFD is activated, the user can select the TFOM
value threshold. Below this value, the TFD is high, otherwise the TFD is low.
Generate Bit Synchronization (BS):
Enabled: The second STANAG signal (TOD 2) is used to send the BS (Bit
Stream) signal used with STANAG 4430-STM. When BS is active, the con-
figuration of TOD 2 is superseded and only used for BS.
Disabled: The second STANAG signal (TOD 2) can be used to send an inde-
pendent TOD.
Timescale: 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
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-
February-2021, this is 18 seconds ahead of UTC time)
A local clock set up through the Time Management Page—Refer to "The
Time Management Screen" on page166 for more information on how to con-
figure 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 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.
Configurable settings for each Time of Day are:
SecureSync 2400 User Manual 421
APPENDIX
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