EXFO FTB-8510B Guia Del Usuario página 1176

System Tab
Clock Synchronization
Backplane
The backplane feature allows sharing the same backplane 8 kHz clock for
synchronization group purposes. The other module must support the
backplane clock feature to be able to use the generated backplane clock.
Configuration: Allows the selection and configuration of the backplane
8 kHz clock that will be generated when enabled.
Clock Mode: Allows the clock source selection. The default setting is
Internal.
Internal: Internal clock of the unit (STRATUM 3).
External: Clock received from the connected DS1/E1/2M external
clock signal (AUX port). See Clock Synchronization - RX on page 522 to
complete the external clock settings.
Recovered: Clock from the test optical/electrical port input signal. Not
available with OTU1e/OTU2e/OTU1f/OTU2f.
Enable: Allows enabling the selected backplane clock.
Alarm Analysis
LOC (Loss Of Clock): Indicates if the module is able (green) or unable
(red) to synchronize with the selected test clock.
526
FTB-8100 Series Transport Blazer