Nevion 3GHD-OE - Manual (Page 10)

3GHD-OE / 3GHD-OE-2 Rev. F
nevion.com | 10
3.5 Automatic change over
Dual optical converter has an automatic changeover module. This module has the possibility
to have an automatic change over on the input. This can be used in redundancy systems
where the user wants automatically switch to a backup port when the main input loses signal.
This function can be turned with DIP#5. From GYDA this function can be turned on for each
converter. Each converter can be configured to what is main and backup input by DIP#2 and
DIP#4 or from GYDA.
3.5.1 Trigger condition
Loss of optical power trigs the automatic change over. When the main input loss optical
power the backup input is selected. When the backup input is active an alarm is displayed in
Gyda. When the main input optical power is restored the converter switches immediately
back to main input and the alarm is restored.
Note that bit error or loss of lock on reclocker does not trigger the ACO.
3.6 Single converter configuration example
Optical input
O2
O2
I/O2
O1
O1
I/O1
RCL1
PRI1
RCL2
PRI2
SWP
DOP
OVR
O
N
1
8
Reclocker 2
3G/HD/SD-SDI
Reclocker
3G/HD/SD-SDI
Figure 5 OE converter with reclocker
Optical input
O2
O2
I/O2
O1
O1
I/O1 RCL1
PRI1
RCL2
PRI2
SWP
DOP
OVR
O
N 1
8
Figure 6 OE converter with reclocker in bypass