EXFO FTB-8500 Series for FTB-500 - Manual (Page 400)

System Tabs
386 FTB-8500 Series and FTB-8120NGE/8130NGE
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.

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.
Clock Mode LAN WAN
Internal: Internal clock of the unit (STRATUM 3). Internal is the only
available clock when 10GigE LAN transceiver mode is selected with Frame
Analyzer, BERT, or RFC 2544 test.
X X
External: Clock from the connected DS1/E1/2M external clock signal (For
FTB-8510G: EXT. CLK DS1/2M IN port; For FTB-8120NGE/FTB-8130NGE
and FTB-8525/FTB-8535: AUX port). Once the test is created, refer to Clock
Synchronization - RX to complete the external clock settings. For
FTB-8120NGE and FTB-8130NGE, External is not available in Dual Test Set
one-way latency mode.
- X
Recovered: Live clock from the optical port input signal involved in the test.
Recovered is the only available clock when 10GigE LAN transceiver mode is
selected with Smart Loopback test. Recovered is only available for Smart
Loopback test.
X X
Backplane: 8 kHz clock from another module on the FTB-500. Note that the
other module must support the backplane clock feature and must be
enabled (refer to Backplane on page 386 for more information).
- X