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
2. SUBSYSTEM DESCRIPTION:
2.1 FBDA
Please refer to installation and operation instructions for
FBDA-800AB-50W-DIV
2.2 FBIU
The FBIU is the BTS interface of the system. It includes Fiberoptic
transceiver, duplexer and attenuator for main uplink and downlink , uplink
diversity Fiberoptic transmitter receiver and attenuator, and power supply.
2.2.1Fiberoptic transceiver
The Fiberoptic transceiver converts the signal form RF to optical in the
downlink direction and from optical signal to RF in the uplink direction.
2.2.2 DUPLEXER
The duplexer separates the uplink and downlink signals to anable one RF
cable connection to the BTS. In case of separate connections for Rx and Tx ,
the duplexer is not required.
2.2.3 ATTENUATOR
Assuming that the output power of BTS is +30dBm, a 30 dB high power
external attenuator is required. In practice, more attenuation can be added
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FO-800AB-50W SYS.doc