User Manual

Confidential, Proprietary Information
Title: PCS FlexBeamer
®
RF Repeater
System A &O Manual
Doc. No.:
913002500
Rev.: 00
Page: 13 of
80NUMPAGES
Band filter
Band filter
Micro-
Controller
Power
conditioner
PA
LNA
from BTS
to BTS
Figure 2: BEAMER
®
block diagram
The band pass filters (BPF) supply enough Tx/Rx channel isolation to ensure that the small amount of
Tx signal power and Tx wide band noise power leaking into the sensitive receive channel will not
degrade the Rx channel performance. In the FLEXBEAMER® System the BPF are replaced by a
duplexer and the Beamer antenna by a separate sector antenna.
The Rx amplifier is a low noise amplifier with a high enough intercept point that several PCS channels
received simultaneously should not degrade each other's performance. The low noise and high gain
performance of this amplifier compensate for the high losses of the coaxial cable going down from the
Rx BEAMER
®
front-end to the RAC and BAU and transmitted to the base station. The Tx Amplifier
is a power amplifier that enables up to 10 Watts average at the Tx antenna port. while compensating
for gain and power losses in the coaxial cable coming up from the BAU received from the base station.