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Clocking.HBus.AutoFallBack
Syntax
- Clocking.HBus.AutoFallBack = mode
Access
- Read-only
Type
- String
Allowed Values
- YES | NO
Description
- This keyword is read-only for QX boards.
- This keyword is valid for QX 2000/100-4L boards only.
- Indicates that the board automatically switches between the two clock timing references specified by the Clocking.HBus.ClockSource and Clocking.HBus.FallBackClockSource keywords.
- The fallback timing reference clock is selected by the Clocking.HBus.FallBackClockSource keyword. Both of the physical timing references specified by the Clocking.HBus.ClockSource and Clocking.HBus.FallBackClockSource keywords must be present and not in alarm when the board's clocking is set up.
- If the board is configured as the clock master, this keyword allows the board to switch to the secondary timing reference when the first source goes into an ALARM state. If the primary source returns, the board's timing reference switches back to the primary source.
- For more information about QX board clocking, refer to Chapter 5. For general information about CT bus clocking, refer to the OAM System User's Manual.
See Also
- Clocking.HBus.ClockMode
, Clocking.HBus.ClockSource, Clocking.HBus.FallBackClockSource
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