Instruction manual

MXS-EVO - MANUAL
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MXS-EVO – Manual – Rev 1.7 - 16 -
Switchover Function
ETS-EVO allows the possibility to switch the disciplining of its internal timebase selecting one of many sources.
This exchange can be configured to run automatically upon occurrence of an alarm condition, such as:
- PPS signal absence
- disconnection of the antenna
- error in the external source
- error in the E1 signal
- error in the PTP protocol
- error in the IRIG-B signal
In the log are reported the reason of the switch:
Mweb  user defined switch from WEB
Msnmp  user defined switch from SNMP
Mlcd  user defined switch from LCD
Mopto  user defined switch from TLC
Aser  automatic switch due to serial connection lack of GPS
Aant  automatic switch due to connection lack of GPS antenna
Apref  automatic switch to the higher priority source
Aext  automatic switch caused by an error in the external signal
Ae1  automatic switch caused by an error in the E1signal
Aptp  automatic switch caused by errors in the PTP protocol
Airigb  automatic switch caused by an error in the IRIG-B signal
Switch Policies
The MXS-EVO permits to chose the priorità of the various sources.
Priorità is bigger when the value is bigger. 0 inhibits the source.
When the device is configured for automatic switchover two different policies can be used:
Switch & Free
The device switch to the best available source when an error is recognized on the actually selected source.
Switch & Pref
The device always switch to the source with highest priority currenlty available, if valid.
In order to avoid the possibility of continuos alarms due to intermittent switches there is a check that does not permit to
switch more than 3 times in 5 minutes, by automatically lowering the policy (Switch & Pref  Switch & Free).
This event has been given the following code:
Event Code 007 Switch Alarm  Done more than 3 switches in less than 5 minutes
Switchover Treshold
This variable allows to define a time interval (in seconds) that must elapse between the time when an error has been
identified and when it will be exchanged effectively. If during this time the error will disappear, the exchange will be
deleted.