Paradise Datacom 4 RU Chassis, Руководство по эксплуатации

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4 RU SSPA Chassis Operations Manual 201627 REV X 43
Any unit that develops a major fault condition will be automatically muted to avoid any
side effects of the faulted unit on overall system performance.
The Master unit offers two extra informative menu screens for displaying system level
information such as: System forward and reflected power levels, system wide gain or
attenuation, amount of faulted SSPA chassis in the system, etc.
To avoid control conflicts, slave units are forbidden to gather system-wide information,
therefore these system wide information screens always hidden on N+1 Slave units.
2.4.2 Controlling system operation
The N+1 system is under the control of the Master SSPA unit at all times. Any system-
wide settings changes (local or remote) need to be performed on the Master unit. If a
setting is adjusted on a Slave unit, the Master unit will erase and override it with the
current system setting.
Some settings are not controlled by the Master unit because they are used for unit
identification or required for local adjustment during maintenance. Settings such as the
SSPA Network Address, N+1 Address, and IP Address are not enforced by the Master
unit and need to be set individually at every SSPA chassis.
The setting for enabling/disabling/sizing the N+1 system is also not controlled by the
Master unit. This setting allows the user to virtually remove individual SSPA units from
the N+1 control array for maintenance and troubleshooting.
2.4.3 N+1 Addressing
During initial system installation, an appropriate N+1 address has to be selected for
each unit in the system. Each unit should be assigned a unique N+1 address. The
valid addressing range is 1 to 16 for any type of system configuration. Address 0 is re-
served for factory debugging and should not be used. Assigning an address higher
than the total number of SSPA chassis in the system (i.e., address 10 for a system
comprising two 4RU SSPAs) makes the unit thus assigned invisible to the Master unit.
However, the unit will continue to receive commands from the Master unit.
To set the N+1 address of a particular SSPA unit, press the [MAIN MENU] key
→
6.Redundancy → 6.N+1 → 2.N+1 Addressing. Enter the desired address by using the
left [ ◄ ] and right [ ► ] arrow keys to increment the ones place and the up [ ▲ ] and down
[ ▼ ] arrow keys to increment the tens place.
The order of the N+1 addressing is not important for system operation. It is recom-
mended to assign the lowest address to the unit located most conveniently to the user.
All subsequent addresses should be assigned while keeping in mind accessibility of
the front panel controls.