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:
Reference Mode: Used to control how the reference mode operates in determining its
validity. Values are:
Primary Reference—Allows the frequency reference to be valid based solely on its
own presence.
Secondary Reference—Requires another valid reference to synchronize the system
before the frequency reference can be determined to be valid. This is used when
the frequency reference is intended to operate as a backup reference to a dif-
ferent primary reference source.
Frequency: Used to configure the frequency (in Hertz) of the input signal. The available
Frequency range is 1KHz…10MHz in 1Hz steps.
The input frequency is measured versus internal frequency and compared to the setup value. If
the discrepancy is larger than 1kHz, the input is disqualified and not considered valid. The fre-
quency reference does not inherently provide an on-time point, so it relies on the current on-
time point of the system prior to its taking over for synchronization.
Frequency Input: Status Window
To view the current settings of the Frequency Input (also referred to as ‘Reference’), go to its
Status window. For instructions, see: "Viewing Input/Output Configuration Settings" on
page347.
The Web UI list entries for these cards are: 1PPS/Frequency BNC and 1PPS/Frequency RS-
485.
The connector number is: J1 (BNC card); J1 (RS-485 card).
SecureSync User Reference Guide 381
APPENDIX
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