Operating Instructions
Table Of Contents
- FOR
- CELLULAR A+B
- Fiber-optic REPEATER SYSTEM
- 50W WITH DIVERSITY
- _
- 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 upli
- 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 Fiberopt
- For diversity applications the uplink path is duplicated using separate antenna, filter, LNA and Fiberoptic transmitter.
- Please refer to installation and operation instructions for FBDA-800AB-50W-DIV
- Fig. 3: FBIU MECHANICAL LAYOUT
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.
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FO-800AB-50W SYS.doc