Spectracom SecureSync User Reference Manual page 208

3.6 OTHER Setup Pages
3.6.10.3 Oscillator Disciplining Setup
1.
Navigate to the Oscillator Management screen by choosing
MANAGEMENT/OTHER/Disciplining .
2.
Click the GEAR icon at the top of the Status panel. The Oscillators Settings window dis-
plays.
3.
Populate the fields:
192
Maximum TFOM for Sync : When TFOM (Time Figure of Merit, see below) is
greater than Max TFOM, disciplining will still be attempted against the selected ref-
erence to improve the TFOM. If the condition persists, the system will transition to
holdover, and eventually out of sync. When disciplining is performed such that
TFOM is no longer greater than max TFOM, the system will transition back into
sync.
TFOM is SecureSync's estimation of how accurately it is synchronized with its time
and 1PPS reference inputs, based on several factors, known as the
Estimated Time Error or ETE. The larger the TFOM value, the less accurate
SecureSync believes it is aligned with its 1PPS input that is used to perform dis-
ciplining. If this estimated error is too large, it could adversely affect the performance
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3 SecureSync User Reference Guide Rev. 18