User Manual

Confidential, Proprietary Information
Title: PCS FlexBeamer
®
RF Repeater
System A &O Manual
Doc. No.:
913002500
Rev.: 00
Page: 16 of
80NUMPAGES
The RAC interfaces to the Tx and Rx RF signals from the BTS via the Donor antenna and the BAU
has two serial ports for a local host computer RS-485 and remote control via a wireless modem for
diagnostics, (as an option) monitoring and control. The Active Bias-Ts in the RAC enable setting the
proper input power for the BEAMER
®
units and maintaining beam shaping using the DCA inside the
Active Bias-Ts. Up to 6 ACBTs , in any combination of Rx and Tx types can be assembled in each
RAC.
The RAC controller monitors the proper operation of the BEAMER
®
units of the BAU and
FLEXBEAMER® and enables real-time bi-directional communication between individual BEAMER
unit and dedicated computer, via the RAC. The BEAMER
®
modules are constantly monitored and
controlled by the RAC 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 RAC. The coaxial cable can be as long as 100 meters and have losses of up to 8db at 1850 to
1945MHz band.
The Uplink signal at 1850-1865 MHz runs on the same coaxial (Rx)cable with DC and the M&C from the
FLEXBEAMER®, but an isolation between the DC, M&C, and Uplink signals is high due to Bias-T
isolation.
The Down Link signal at 1930-1945 MHz runs on the same coaxial (Tx) cable together with the DC
voltage, but isolation between the DC voltage and Tx signals is high due to Bias-T isolation.
1.3.3. FLEXBEAMER®
Including:
• Linear P.A and LNA (Beamer
®
)
• Duplexer
• Combiners and Dividers
• Active Diversity Units for Up link or Down link or both Diversities (Optional).