This object indicates the wait-to-restore time value
of a T4 input clock source.
The wait-to-restore time ensures that a previous failed
synchronization source is only again considered as available
by the selection process if it is fault-free for a certain time.
When a signal failure condition is cleared on a clock source,
it waits the duration of the wait-to-restore time before
clearing the signal failure status on the clock source.