Fbda; Fbda System Block Diagram - Dekolink MW-FBDA-PCS-xxx-50W Installation And Operating Manual

1.2 FBDA

The FBDA is installed near the area to be covered and is connected to the
mobile antenna. A Fiberoptic transceiver converts the Downlink optical
signals to RF signals and the uplink RF signals to optical signals. A duplexer
in the FBDA separates the uplink and downlink signals thus enabling the use
of the same antenna for receiving and transmitting. The duplexer has sharp
out of band attenuation for better isolation between the receiving and
transmitting paths and for reduction of out of band interfering signals. A high
power amplifier in the downlink path produces high RF power to the antenna.
A pre-amplifier is used to drive the uplink signals from the antenna to the
Fiberoptic transceiver input to maintain reasonable NF (noise figure) in the
uplink path. The FBDA contains a monitoring unit to monitor the operation of
the active elements inside the FBDA. Whenever a fault occurs an ALARM
signal is sent to the FBIU.
High
Tx
pwr
ATTN
ATTN.
30 dB
ATTN.
BTS
30 dB
Rx
ATTN.
30 dB
Rx1
FO-50W SYS
Dekolink WIRELESS Ltd.
16 Bazel St. Qiryat-Arieh Petah-Tikva, Israel, 49510
Tel- 972-3-9180-180 Fax-972-3-
e-mail:
FBIU
RF IN
F/O+
(MAX. 0dBm)
optical in/out
WDM
RF Out
F/O
RF Out
optical in

FBDA SYSTEM BLOCK DIAGRAM

9180
marketing@dekolink.com web
FIBEROPTIC CABLE
RUN UP TO 20Km
optical in/out
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FBDA
F/O+
WDM
RF
section
F/O
optical Out
Mobile ANT.