1PPS Validity: Indicates “OK” (green) if the 1PPS input signal is present and valid.
Indicates “Not Valid” (orange) if the 1PPS input signal is either not present or is not
considered valid.
Reference Mode: Displays how the reference mode operates in determining its
validity.
Frequency: Displays (in Hertz) the configured frequency of the input frequency sig-
nal.
The 1PPS Input signal is analyzed and an absence of the signal triggers a “Not Valid” indic-
ation.
1PPS Output: Edit Window
To configure the settings of the 1PPS output, go to its Edit window. For instructions, see:
"Configuring Option Card Inputs/Outputs" on page336.
The Web UI list entries for these cards are: 1PPS/Frequency BNC and 1PPS/Frequency
RS-485.
The connector number is: J3 (BNC card); J1 (RS-485 card).
The Edit window allows the configuration of the following settings:
Signature Control: Used to control when the 1PPS output signal will be present.
See "Signature Control" on page161 for more information.
Offset: Used to account for 1PPS cable delays or other latencies in the 1PPS output.
The Offset value is entered and displayed in nanoseconds (ns). The available Offset
range is -500 to +500ms.
Edge: The operator can select if the output signal is a positive (reference on the
rising edge) or a negative (reference on the falling edge) pulse.
368 SecureSync 2400 User Manual
APPENDIX
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