User's Manual

1.3.2.2 High Power Backplane CCA Block Diagram Theory
Refer to Figure 1-6. The High Power Backplane CCA provides interconnection and configuration for a
Model 2170 DME System. The High Power Backplane is an 84HP (approximately 16.8”) wide, 5 slot card
cage intended to fit in a standard 19” rack. The High Power Backplane will accommodate up to five High
Power Amplifier Assemblies.
Connections between the High Power Backplane CCA and the Low Power Backplane CCA are
accomplished by 50 pin headers A2P1 and A2P2. These connectors are keyed to prevent incorrect
installation.
The control signals of A2P1 and A2P2 are distributed to the five possible amplifier connectors A3P1
through A7P1. Connectors A3P1 through A7P1 are DB37 female connectors with blind-mate adapters
(BMA).
+48 volts and ground power for each of the five possible amplifiers is routed via screw terminals A2E1
through A2E10. These terminals are each rated for 30 amps of continuous current.
Each amplifier has an RF_OUT signal, routed via connectors A3J2 through A7J2, which eventually
connect to couplers for further processing.