User Manual

INTRODUCTION
Proprietary Information
Title: BEAMER Array System-
Assembly and Operation Manual
Doc. No.: 913000100 Rev.: 00
Page: 17 of 92
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.