Absolute Phase Error: ±50ns (1σ)
Programmable Phase Shift: ±5ns to 500ms with 5ns resolution
1PPS Input and Output: Viewing Signal State
To quickly view if the PPS inputs and outputs of this option card are currently enabled or dis
abled, go to the option card’s Status Summary panel. For instructions, see: "Viewing an
Input/Output Signal State" on page331.
1PPS Input: Edit Window
To configure the settings for the 1PPS Input (also referred to as ‘Reference’), go to its Edit win
dow. For instructions, see: "Configuring Option Card Inputs/Outputs" on page330.
The Web UI list entries for these cards are: 1PPS/Frequency BNC and 1PPS/Frequency RS-
485. The connector number is: J2 (Model 1204-03: RS-485 connector: Pins 5 and 6)
Note: SecureSync starts numbering I/O ports with 0 (only 1PPS and 10MHz out
puts start at1, because of the built-in outputs).
The Edit window allows the configuration of the following settings:
Edge: The operator can select either the rising or the falling edge as the input time ref
erence (defines the on-time point of the signal).
Offset: It is possible to add an offset to the input signal (to account for cable delays),
with a resolution of 5ns and a positive or negative value of 500ms maximum.
1PPS Input: Status Window
To view the current settings of the PPS Input (also referred to as ‘Reference’), go to its Status win
dow. For instructions, see: "Verifying the Validity of an Input Signal" on page332.
362 SecureSync User Reference Guide
APPENDIX
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