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4 RU SSPA Chassis Operations Manual
The system current state is determined by the position of the two waveguide switches.
Each HPA constantly monitors the state and assumes an online or standby state from
the switch position. All three HPAs need to be configured to “HPA1”, “HPA2” and
“HPA3” status according to their relative position to the waveguide switches. These
settings need to be provided to each HPA by the operator through the HPA front panel
menus or through a remote control interface.
The system is capable of operating in 2 modes: “Auto” and “Manual”.
Normally, the system needs to be configured in “Auto” mode. In this mode, when an
HPA develops a summary alarm, the system will automatically switch to the backup
HPA. “Manual” mode should be used only for maintenance purposes. During this
mode, automatic switchover will be performed if a malfunctioned HPA’s controller card
is completely dead. If an HPA has a summary fault, but the controller card is still alive
then HPA will remain in online state.
Both modes allow the user to switch HPAs from online to standby state by pressing
“Unit1” button on the front panel or through command on remote interface. Typical
switchover time is 200mS or less. Switchover also can be performed by physical
rotation of one or both waveguide switches. Unlike internal 1:1 redundancy mode, the
SSPA will not prevent the operator from turning the switch.
5.1 Required hardware
•
Three Teleydne Paradise Datacom RM SSPAs with controller card firmware
revision better than 2.50 and I/O card version better than 1. Internal 1:2
redundancy mode for earlier hardware/firmware revisions is not available. If
you purchased your SSPA as a standalone unit or as part of a 1:1 system,
consult with Teledyne Paradise Datacom to determine if the revision of
digital controller is 1:2 enabled. 1:2 redundancy Mode, unit HPA status and
polarization priority need to be selected on all connected HPAs.
•
1:2 link cable. The link cable allows redundancy state information to pass
between the HPAs and should be connected to the HPA’s Link Port, J8.
Important! Cable ends are not symmetrical! When connecting HPAs with
the link cable make sure that connected units HPA status (HPA1, HPA2 or
HPA3) match the labels on the link cable ends!
•
1:2 switch cable. This cable provides an electrical connection between the
HPAs and waveguide switches. The cable allows either HPA to control both
waveguide switches.
Important! Cable ends are not symmetrical! When connecting, observe the
labels!
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