Spectracom SecureSync User Reference Manual page 324

5.2 Time and Frequency Option Cards
Reference Mode : Displays how the reference mode operates in determining its validity.
Frequency : Displays (in Hertz) the configured frequency of the input frequency signal.
The 1PPS Input signal is analyzed and an absence of the signal triggers a "Not Valid" indication.
5.2.3.9 1PPS Output: Edit Window
To configure the settings of the 1PPS output , go to its Edit window. For instructions, see: "Con-
figuring the Settings of an Input or Output" on page 290.
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 "Sig-
nature Control" on page 201 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 +500 ms.
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.
Pulse Width : Configures the Pulse Width of the 1PPS output. The Pulse Width is entered
and displayed in nanoseconds (ns). The default Pulse Width is 200 milliseconds.
308
NOTE – SecureSync starts numbering I/O ports with 0 (only 1PPS and 10 MHz out-
puts start at 1, because of the built-in outputs).
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5 SecureSync User Reference Guide Rev. 18