Teledyne 6 RU Chassis, Operation Manual

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76 202058 REV AA 6 RU SSPA Chassis Operations Manual
Figure 3-18: Gain Reduction Due to Failed SSPA Modules
ONE SSPA MODULE FAILURE
Gain Change Max. Output Power
Auto On = 0 dB
-2.5 dB
Auto Off = -2.5 dB
TWO SSPA MODULE FAILURES
Gain Change Max. Output Power
Auto On = -1.0 dB
-6.0 dB
Auto Off = -6.0 dB
THREE SSPA MODULE FAILURES
Gain Change Max. Output Power
Auto On = -7.0 dB
-12.0 dB
Auto Off = -12.0 dB
3.3 System Gain and Power vs. Number of Modules in System
With parallel system architectures the amplifier output power capability and gain will
change as the number of active modules varies. The 6RU SSPA chassis is designed
so that the overall system gain will remain constant in the event of a single module
failure. This is achieved when the system is operated in “Auto-Gain Control” mode
(See
Section 2.4.5
).
Figure 3-18
shows the system gain and maximum output power for a 6RU SSPA
chassis with a failure in one, two, and three SSPA modules within a single chassis.