Paradise 205486 REV F manual 8.4.1 1:2 Fixed Phase Combined System Components, Signal Box Assembly

In this system, amplifiers 1 and 3 are normally online. The outputs of 1 and 3 are directed by the waveguide switches into a fixed phase combiner such as a waveguide “magic tee” style combiner. In the event of a failure of either on line amplifier, the standby amplifier, 2, can be switched in place of either 1 or 3 and the system maintains full output power.

The 1:2 Fixed Phase Combined Amplifier System can be configured with any of the Compact Outdoor Amplifiers listed in Appendix E in either C or Ku band. The output power of the system is two-times the output power of the single SSPA.

System designers find that the 1:2 Fixed Phase Combined Amplifier System topology is a very cost effective solution to realizing higher power amplifier systems. For example, it is less expensive to configure a 1 kW C-Band redundant system using (3) 500W Compact Outdoor Amplifiers in a 1:2 Fixed Phase Combined redundant system than it is to use (2) 1 kW amplifiers in a traditional 1:1 Redundant System.

8.4.1 1:2 Fixed Phase Combined System Components

An outline drawing of a 1:2 Fixed Phase Combined Amplifier assembly is shown in Figure 8-

8.The system consists of:

(1)Amplifier Base Assembly, which comprises:

(1)Mounting Base (Frame or Plate)

(3)Compact Outdoor SSPAs

(1)Waveguide Switch Assembly

(1)Signal Box Assembly with Integrated Block Upconverters

(2)Cable Assemblies between SSPAs and Signal Box

(1)FPRC-1200 1:2 Phase Combined Redundant Controller

(2)Cable Assemblies between Signal Box and FPRC-1100

(3)AC line cables

(1) Quick Start RS-232 Cable for test / debug

The Amplifier Base Assembly is typically shipped intact. Verify that the hardware is securely tightened for each Compact Outdoor amplifier and make sure to observe the amplifier’s position indicator. If facing the RF Output end of the amplifiers, HPA 3 should be on the left hand side, HPA 2 should be in the center, and HPA 1 should be on the right hand side as shown in Figure 8-8.

Verify that the connections of the Waveguide Switch Assembly mate with the proper SSPA.

The FPRC-1200 controller is a 1 RU external controller specifically designed to handle such an amplifier system. It not only handles all traditional fault monitoring and switching duties, but also provides an overall system monitor and control facility.

8.4.2 Signal Box Assembly

The Signal Box Assembly contains the RF input isolator and three way splitter that routes the RF to each amplifier. It also routes the monitor and control signals from each amplifier back to the FPRC-1200 system controller.

76 205486 REV F Operations Manual, HPA2, Compact Outdoor SSPA