Irig Standards And Specifications; About The Irig Output Resolution - Safran SecureSync 2400 User Manual

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IRIG Standards and Specifications

The IRIG output signals are generated from SecureSync's System Time, which

can be synced to one or more external input references (such as GPS, IRIG, PTP,

etc). The accuracy of the System time to true UTC time is dependent upon what

the selected external reference is (with GPS typically being the most accurate ref-

erence for the system to sync with).

IRIG AM synchronization of a device to its IRIG source is typically measured in the

tens of microseconds, while synchronization using a IRIG DCLS signal can typ-

ically provide around 100 nanoseconds or so (plus the cable delays between

SecureSync and the other device, as well as the processing delays of the other

system itself).

IRIG AM functionality is available through an option card.

Note that all IRIG outputs has its own available 'offset' capability, which is con-

figurable via SecureSync's Web UI, to help account for cabling and processing

delays of the device each output is connected with.

SecureSync 2400 User Manual

Seconds (00-59), (00-60 for leap second)

The sign of the offset to UTC, + implies time is ahead of UTC

The magnitude of the offset to UTC in units of half-hours.

If ZZ = 0, then z = +

Time mode character, is one of:

The current leap seconds

The future leap seconds, which will show a leap second

pending 24 hours in advance

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