Validity: If the IRIG input is not present, or is not considered valid and qual-
ified, the “1PPS Validity” and “Time Validity” fields will be considered “Not
Valid” (Orange).
Once the IRIG input has been supplied and the signal is considered valid
and qualified, the two indicators will then turn “Valid” (Green).
Format: Identifies the formatting of the IRIG input signal, as defined by the
IRIG generator time source. The possible values are:
IRIG A
IRIG B
IRIG G
NASA-36
Modulation Type: Identifies the type of input signal modulation. The pos-
sible values are:
IRIG DCLS—A TTL (Phase) modulated signal.
IRIG AM—An amplitude modulated signal.
Frequency—The IRIG modulation frequency. This is determined by
the configuration of Format and Modulation Type. See also: "IRIG Car-
rier Frequencies" on page588.
Coded Expression: Defines the data structure of the IRIG signal, where:
BCD = Binary Coded Decimal
TOY = Time of Year
CF = Control Field
SBS = Straight Binary Seconds
Message: The IRIG message.
IRIG Output: Edit Window
To configure the settings of one of the two IRIG Outputs, go to its Edit window.
For instructions, see: "Configuring Option Card Inputs/Outputs" on page364.
The Web UI list entries for these cards are: IRIG In/Out BNC and IRIG In/Out
Fiber.
The connector numbers are: J2 and J3.
SecureSync 2400 User Manual 449
APPENDIX
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