User's Manual
Table Of Contents
- FiberLink(
- BI-DIRECTIONAL AMPLIFIER
- WITH DIVERSITY
- MW-FBDA-800AB-50W-DIV
- _
- The duplexer serves to frequency separate uplink signals from downlink signals. The duplexer has sharp out of band attenuation for better isolation between the receiving and transmitting paths and for better rejection of interfering signal in the air. In
- The uplink amplifier is a low noise, 45dB gain unit. The amplifier contains AGC control circuitry. When a high power signal is received the automatic level control detects it and reduces the gain so that the output power of the amplifier is constant. The
- The LED on the amplifier illuminates when the power output of the amplifier exceeds the AGC power set limit (when the AGC is either ON or OFF).
- The Switch on the RF amplifier enables the AGC function. If the AGC is disabled then the amplifier gives maximum gain for any input.
- The AGC level is factory set to 0 dBm and AGC is set to ON, to prevent high power damage at the Rfiber+ input.
- The FBDA monitor performs the following functions:
- a) Monitors the DC supply voltage of the FBDA. The fault LED illuminates when the voltage is beyond the specified limits.
- b) Monitors the current to each active element and the internal fan. If the current is below or above the specified limits then a LED illuminates.
- c) Monitor the optical receive signal using alarm output of the optical transceiver.
- d) Monitors the Thermostat for high temperature alarm.
- e\) Provides automatic alarm function. Whenever
- e) Provides self test for the alarm functions. The pushbutton switch on the Monitor unit turns on all the alarm LEDs and initiates the summarized alarm.
- 2.7 POWER DISTRIBUTION UNIT
- The power distribution unit acts as DC connection panel. It receives power from the power supply and distributes it to the FBDA units.
- It contains the following functions:
- Fuse and for the DC power coming from the AC power supply.
- Current sampler for the high power 50 Watt amplifier.
- distribution strip for various units.
- 2.8 POWER SUPPLYS
- This is a high efficiency switching power supply providing +28 VDC for the 50W amplifier, and a +13.5 VDC for other units.
- In order to satisfy the FCC RF exposure requirements, you must ensure that the installation complies with the following:
- The antenna is connected via cable that has typical 1~10 dB attenuation (depends on the length of the cable) to the FBDA MOBILE port. In most cases, indoor or outdoor, the antenna is omnidirectional (isotropic), or wide beam, with 0 to 3 dBi typical
- For indoor applications the output power can be distributed to several antennas.
- When 4 antennas (or more) are used, the indoor antenna must be installed to provide a minimum separation distance of 0.3 m (30 cm) from persons within the area.
- Fig. 7: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
4. RF EXPOSURE WARNING
In order to satisfy the FCC RF exposure requirements, you must ensure that the
installation complies with the following:
The antenna is connected via cable that has typical 1~10 dB attenuation (depends on
the length of the cable) to the FBDA MOBILE port. In most cases, indoor or outdoor,
the antenna is omnidirectional (isotropic), or wide beam, with 0 to 3 dBi typical gain ,
VSWR: better than 1.5:1 , Impedance: 50 ohm. The antenna must be installed to
provide a minimum separation distance of 0.6 m (60 cm) from persons within the area.
For indoor applications the output power can be distributed to several antennas.
When 4 antennas (or more) are used, the indoor antenna must be installed to provide
a minimum separation distance of 0.3 m (30 cm) from persons within the area.
Fig. 6 : FBDA SYSTEM BLOCK DIAGRAM
Mobile ANT.
BTS
High pwr
ATTN.
Tx
Rx
F/O+
WDM
RF IN
RF Out
optical in/out
optical in
F/O+
WDM
optical in/out
optical Out
FBDA
RF
section
BASE SITE
FIBEROPTIC CABLE
RUN UP TO 20Km
ATTN.
(MAX. 0dBm)
F/O
F/O
RF Out
ATTN.
Rx1
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