User's Manual

INTRODUCTION
Confidential, Proprietary Information
Title: PolBEAMER PCS (3.2) Array System-
Assembly and Operation Manual
Doc. No.:
913000801
Rev.: 01
Page: 14 of 91
control communication on the RF cables to the BEAMER® system, a modem for
communicating with each of the BEAMER® units, and a digital processor/controller.
The ICU interfaces to the Tx and Rx RF connections in the BTS, to the Alarm concentrating
unit in the BTS, and has serial ports for a local host computer, for remote control, and for
diagnostics. A set of indicator lights visually reports the status of each BEAMER® Array.
The ICU can be remote controlled through an internal modem connected to a phone line and
a remote host computer. The Active Bias-Ts in the ICU enable setting the proper input power
for the BEAMER® and maintaining beam shaping using the DCA inside the Active Bias-Ts.
Up to 12 ACBTs , in any mixture of Rx and Tx types can be assembled in each ICU
1.3.2. ICU Controller Description
The controller controls the proper operation of the BEAMER® circuits and enables real-time
bi-directional communication between individual BEAMER® units and the Base Station
central computer or dedicated computer, via the ICU. Up to 16 BEAMER® modules can be
monitored and controlled by each ICU unit.
Bi-directional communication with the BEAMER® is established through an FSK modulated
communication channel multiplexed on the Rx coaxial cable connecting the individual
BEAMER® , to the ICU within the base station. The coaxial cable can be as long as 100
meters and have losses of up to 10db at 1850-1990MHz band.
The Rx signal at 1850-1910 MHz runs on the same cable with DC and the M&C, but an
isolation between the DC, M&C, and Rx signals is high due to Bias-T isolation.
The Tx signal at 1930-1990 MHz runs on the same cable together with the DC voltage, but
isolation between the DC voltage and Tx signals is high due to Bias-T isolation.