ADC Telecommunications Inc. PSM0800M Manual De Usuario

The RF Module provides the PRU with an internal Duplexer that is optimized to provide the desired RF band‐pass
filtering and in‐band equipment isolation between FWD and REV paths. The Duplexer provides the filtering
necessary to the transmit and receive paths to and from the connected antenna.
The Duplexer for the Single‐ and Dual‐Bay RF Modules and the Legacy Dual‐Bay 40W RF Modules contains up to
two REV path Low Noise Amplifiers (LNA for PRI and/or SEC reverse paths).
The Duplexer for an HDM RF Module does not have a Low Noise Amplifier.
Duplexers are not field serviceable.

The Digital Processing Module (DPM) is found only in the HDM RF Modules. The DPM provides the primary
processing and logic functions for the HDM RF Module. It also provides the primary power interface for the HDM
RF Module, and conversion of the native 28 Vdc voltage to lower voltages as necessary for functionality.
The DPM has a Transmit (Tx) Board and a Receive (Rx) Board:

Tx Board—provides band specific filtering for the intended Transmit path.

Rx Board—provides band specific filtering for the intended Receive path.