Dekolink Wireless FBDA800AB50WD Installtion and operating instructions
Dekolink WIRELESS Ltd.
16 Bazel St. Qiryat-Arieh Petah-Tikva, Israel, 49510
Tel- 972-3-9180-180 Fax-972-3- 190-9180
e-mail: marketing@decolink.com
web www.decolink.com
INSTALLATION AND
OPERATING INSTRUCTIONS
FOR
CELLULAR A+B
Fiber-optic REPEATER SYSTEM
50W WITH DIVERSITY
& FiberopticBase Interface Unit
Page
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FO-800AB-50W SYS.doc
Dekolink WIRELESS Ltd.
16 Bazel St. Qiryat-Arieh Petah-Tikva, Israel, 49510
Tel- 972-3-9180-180 Fax-972-3- 190-9180
e-mail: marketing@decolink.com
web www.decolink.com
TABLE OF CONTENTS
PARA No. PARAGRAPH PAGE No.
1. OVERVIEW 3
1.1 FBIU 3
1.2 FBDA 4
2. SUBSYSTEM DESCRIPTION 5
2.1 FBDA 5
2.2 FBIU 5
2.2.1 FIBEROPTIC TRANSCEIVER 5
2.2.2 DUPLEXER 5
2.2.3 ATTENUATOR 5
3 SYSTEM SPECIFICATIONS 7
3.1 RF SPECIFICATIONS 7
3.2 FBDA ALARM SPECIFICATIONS 8
3.3 MECHANICAL SPECIFICATIONS 8
3.4 ENVIRONMENTAL CONDITIONS 8
4 INSTALLATION PROCEDURE 9
4.1 FIBER OPTIC LINK ASSEMBLY 9
4.2 DOWNLINK CALLIBRATION 9
4.3 UPLINK CALLIBRATION 9
4.4 SYSTEM ASSEMBLY 10
LIST OF FIGURES
Fig No. Fig. name Page No.
1 FIBEROPTIC REPEATER
SYSTEM BLOCK DIAGRAM
4
2 FBIU RF BLOCK DIAGRAM 6
3 FBIU MECHANICAL LAYOUT 11
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FO-800AB-50W SYS.doc
Dekolink WIRELESS Ltd.
16 Bazel St. Qiryat-Arieh Petah-Tikva, Israel, 49510
Tel- 972-3-9180-180 Fax-972-3- 190-9180
e-mail: marketing@decolink.com
web www.decolink.com
1. OVERVIEW:
The Fiber optic repeater system is an excellent solution for BTS coverage
extension by means of Fiber optic link and remote high power RF head.
The system consists of two conversion boxes;
- FBIU (Fiberoptic Base Interface Unit)
- FBDA (Fiber optic Bi Directional Amplifier)
Two fibers, one for main path, uplink and downlink direction and one in
diversity uplink direction connect the FBIU to the FBDA. Using fiberoptic
cable allows long distance transmission, up to 20 Km.
1.1 FBIU
The FBIU is installed near the BTS and is connected to the BTS by RF
cables. A Fiberoptic transceiver converts the Downlink RF signals to optical
signals and the uplink optical signal to RF. A high power attenuator is used
as power adjustment between BTS Tx power and Fiberoptic transceiver
requirements. A separate attenuator is used for Rx direction.
The Diversity path is connected through Fiberoptic receiver and fixed
attenuator to the Diversity receiver.
Page
3 of 3
FO-800AB-50W SYS.doc
Dekolink WIRELESS Ltd.
16 Bazel St. Qiryat-Arieh Petah-Tikva, Israel, 49510
Tel- 972-3-9180-180 Fax-972-3- 190-9180
e-mail: marketing@decolink.com
web www.decolink.com
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 LNA (low noise 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.
BTS
For diversity applications the uplink path is duplicated using separate
antenna, filter, LNA and Fiberoptic transmitter.
BASE SITE
FBDA
F/O+
WDM
RF
section
F/O
Tx
Rx
Rx1
FIBEROPTIC CABLE
High pwr
ATTN.
ATTN.
ATTN.
RF IN
(MAX. 0dBm)
RF Out
RF Out
F/O+
WDM
F/O
optical in/out
optical in
RUN UP TO 20Km
optical in/out
optical Out
Fig. 1 : Fiber-optic REPEATER SYSTEM BLOCK DIAGRAM
Mobile ANT.
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FO-800AB-50W SYS.doc
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