This object indicates the manual switching flag.
The 'true' value indicates the currently selected
T4 clock source is a result of the manual switch command.
The command allows a user to select a synchronization source
assuming it is enabled, not locked out, not in signal fail
condition, and has a QL better than DNU in QL-enabled mode.
A clock source is enabled when it occupies in row in
cnsT4ClockSourceTable. A clock source is not locked out
when cnsT4ClkSrcLockout contains the value 'false'.
A clock source is not in signal failure condition when
cnsT4ClkSrcSignalFailure contains the value 'false'.
The QL is identified in cnsT4ClkSrcQualityLevel.
In QL-enabled mode, a manual switch can be
performed only to a source which has the highest
available QL.