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Trilogy Communications
Mentor CX
3.
OPERATION
3.1
I
NTRODUCTION
There are three basic principles which are key to operation of the Mentor CX.
1.
An error or fault condition on a single channel causes, without exception, a total
changeover from the primary to secondary reference generator. Channels may be included
or excluded from the decision making using front panel controls or Vector management.
This allows the “faulty” generator to be isolated and removed from service for repair or
replacement without causing any further disturbance to the transmission.
2.
The logic underpinning automatic changeover is fundamentally “one time only”. So, if an
error occurs, Mentor CX will switch from primary to secondary generator. A further switch
back to primary will not occur without manual intervention. This is to eliminate the
possibility of repeated back and fore switching which would be very disruptive. The most
common occurrence of this is a missing termination downstream of Mentor CX. This will
cause an “over amplitude” error and thus a changeover. However, in this case, the fault will
now be flagged on the reserve generator which will also display an error. The “one time
only” approach means that the reserve generator will now remain in service until the
problem is resolved and the Mentor CX is manually reset.
3.
Changeover will only take place if the alternate generator is operating correctly. This means
that there are no errors and that the input signals are the same type.
A limited amount of information and key aspects of control are presented at the front panel and
these are described first. More complete operation and system setup are provided by Vector
management and this is described in section 4 - Using Vector | Web Browser Based Management.
