Paradise Datacom 4 RU Chassis, Руководство по эксплуатации

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4 RU SSPA Chassis Operations Manual 201627 REV X 65
Section 5: 1:2 Internal Redundant System
Operation
5.0 Introduction
Three Rack Mount SSPA units with controller firmware version greater than 4.50 and
I/O board hardware version greater than 1.0 can be connected together to form a 1:2
redundant system without a separate 1:2 redundancy controller (internal redundancy).
The system provides automatic switchover to the spare SSPA to either polarization
path in case of a primary SSPA malfunction. In the case of two SSPA malfunctions, the
backup SSPA can be switched to either polarization path, according to a polarization
priority selection setting.
The standard 1:2 configuration has HPA1 online in the polarization 1 path, HPA3
online in the polarization 2 path, and HPA2 acting as spare backup for ether HPA1 or
HPA3 (see
Figure 5-1
).
A 1:2 redundancy system normally requires a separate redundancy controller (RCP).
The RCP is used to constantly check the state of the controlled HPAs and, in case of
malfunction, rotate the waveguide switches according to an internal logic table.
Operation of a 1:2 system with controller is more fully discussed in the Redundant
Systems Controller Operations Manual, document number 205933.
Teledyne Paradise Datacom also offers an internal 1:2 redundancy system, where the
extra controller is not required and the state of the system is negotiated between all
three HPAs over the redundancy link and switch cables. In this system, the link cable is
used to pass information regarding the standby/online state between the HPAs. The
switch cable is used to drive waveguide switches and determine their current position.
Figure 5-1: Block Diagram, 1:2 Redundant System
RF OUT-POL 2
RF OUT-POL 1
Amp 1
Amp 2
Amp 3
RF IN-POL 1
RF IN-POL 2