ADC Telecommunications Inc. PSM230WM Manual Do Utilizador

The RF Module provides the Remote Unit 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. 

Always provided at each RF Module shelf are five cables:

two High-Speed Data Cables, which in this document are referred to as LVDS (Low-Voltage Differential 
Signaling) cables

two RF Cables (TX0/RX0) and (TX1/RX1)

one Power (PWR) Cable.

The RF Module cables that are pre-installed in the PRU connect to the corresponding connectors on the RF 
Module. The RF Module cables correlate to the antenna connectors on the bottom of the Remote Unit chassis.