Teledyne 6 RU Chassis, Руководство по эксплуатации

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58 202058 REV AA 6 RU SSPA Chassis Operations Manual
If the Master unit develops any kind of major fault condition, it delegates its Master
privileges to the unit which is next in N+1 ranking and becomes a slave unit. This type
of control architecture eliminates a single point of failure and achieves true N+1 system
redundancy.
The Master unit is designated with a lit Online indicator and VFD display showing the
overall system state. See
Figure 2-18
.
The Online indicators of the Slave units are always turned off and the VFD displays the
message shown in
Figure 2-19
.
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.
Figure 2-19: Front Panel Display, Slave Unit (Online indicator dark)
Figure 2-18: Front Panel Display, Master Unit (Online indicator illuminated)