Paradise Datacom 4 RU Chassis, Руководство по эксплуатации

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4 RU SSPA Chassis Operations Manual 201627 REV X 55
3.2 Changing N+1 hierarchy
Normally, the hierarchical structure of the N+1 array must be set during initial system
setup. However, the operator may change the N+1 addressing hierarchy at any time.
To ensure uninterruptible system operation during such system maintenance, certain
procedural steps must be followed.
3.2.1 Changing hierarchical order of slave units
To change the hierarchical order of N+1 slave units without interrupting the system
operation:
Important! The Master unit will lose sight of one of the slave units for the dura-
tion of this procedure. If the system is in Auto Gain mode, this condition will
cause gain overshoot. Temporarily turn off the Auto Gain feature.
1. Turn off Auto Gain setting if needed.
2. For first slave unit temporarily select N+1 address setting outside maximum
address for current N+1 array For example: for system of 4 units select ad-
dress 5 or above; for system of 8 units select address 9 or above etc.
3. For second slave unit change its N+1 address to match previous N+1 ad-
dress of the first unit.
4. Change N+1 address of the first slave unit to match.
5. System addressing hierarchy is now exchanged between first and second
unit. Turn on Auto Gain option if required.
3.2.2 Exchange N+1 privileges between master and slave units
To delegate master privileges to a slave unit without interrupting system operation:
1. On the slave unit intended to be set as new Master unit, set the N+1 address
value to “0”. Assuming the unit is free from internal faults, the unit will in-
stantly change its mode to Master.
2. On former Master unit, select its N+1 address to match the address of the
former slave unit.
3. On the new Master unit, change the N+1 address value from “0” to the
address value of the former Master unit.
3.2.3 Add an SSPA unit to the system
If one of the SSPA units was removed from the system or it down for maintenance,
adding it back to system array may cause an unexpected change to a system state. To
provide uninterruptible system operation, follow the procedure below.