Elisra MW-CBDA-ESMR-10W80A, MW-CBDA-SMR-10W80A-PS8, MW-CBDA-SMR-10W80A-PS9, MW-CBDA-GSM-10W80A, MW-CBDA-CELLB-10W80A Installation And Operating Instructions Manual
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INSTALLATION
AND
OPERATING INSTRUCTIONS
FOR
MW-CBDA SERIES 10W-80-A
COMPACT BI-DIRECTIONAL
AMPLIFIERS
Dekolink Wireless Ltd.;16 Bazel St.Qiryat-Arieh Petah-Tikva Israel, 49510
Tel- 972-3-9180-180; Fax-972-3- 190-9180 ;
Web site-
www.dekolink.com
r
Email-marketing@dekolink.com
02
ev 5 11/
page 1 of 12
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INSTALLATION &
OPERATING INSTRUCTIONS
CBDA 10W-80-A
COMPACT BI-DIRECTIONAL AMPLIFIERS
TABLE OF CONTENTS
PARAGRAPH PAGE No
BDA OVERVIEW 3
BLOCK DIAGRAM DESCRIPTION 3
STEP ATTENUATOR & RF GAIN & SETTING 4
AGC FUNCTION 5
AGC & GAIN CONTROLS 5
BDA INSTALLATION 6
BASE/DONOR ANTENNA INSTALLATION 6
REMOTE/MOBILE ANTENNA INSTALLATION 6
ANTENNA ISOLATION 6
INSTALLATION STEPS 7
DIAGNOSTICS GUIDE 8
ELECTRICAL SPECIFICATIONS 9
SYSTEM FREQUENCY RANGE 9
ENVIRONMENTAL CONDITIONS 10
MECHANICAL SPECIFICATIONS 10
RF EXPOSURE WARNING 10
LIMITED WARRANTY 12
LIST OF DRAWINGS
DRAWING PAGE No
BDA RF BLOCK DIAGRAM 4
AGC AMPLIFIER 5
MECHANICAL OUTLINE 11
Dekolink Wireless Ltd.;16 Bazel St.Qiryat-Arieh Petah-Tikva Israel, 49510
Tel- 972-3-9180-180; Fax-972-3- 190-9180 ;
Web site-
www.dekolink.com
r
Email-marketing@dekolink.com
02
ev 5 11/
page 2 of 12
;
The Compact Bi-Directional Amplifier (CBDA) assembly provides an exceptional
repeater/booster performances to extend the coverage area of radio
communications in buildings and RF shielded environments.
Features such as high linearity power amplifiers are contributing for the overall
improved system linearity performances. The unit is based on a duplexed path
configuration, having sharp out of band attenuation for improved isolation
between the receiving and transmitting paths.
The CBDA Downlink path receives the RF signals from base station amplifies
them and transmits them to the subscriber. The BDA Uplink path receives the
RF signals from the subscriber amplifies them and transmits them to the base
:BDA OVERVIEW
:BLOCK DIAGRAM DESCRIPTION
station. Two duplexers frequency separate the signals to the proper amplifying
path and isolate the two signals.
For each path two amplifiers do the path signal amplification; a low noise
amplifier (LNA) and a high power amplifier. The low noise amplifier has a 30 dB
step attenuator at its output. The step attenuator is used to set the BDA
repeater gain.
The power amplifiers in the BDA have an AGC option switch. When switched on,
the AGC circuit limits the amplifier output power. The AGC circuit senses the
output power and introduces more attenuation, when the output power exceeds
the preset level. This way the gain of the amplifier is reduced, its output power is
limited and the intermodulations products are kept below the desired level.
The AGC amplifier has a Power LED lamp that illuminates when the output
power has reached the preset power limit.
Dekolink Wireless Ltd.;16 Bazel St.Qiryat-Arieh Petah-Tikva Israel, 49510
Tel- 972-3-9180-180; Fax-972-3- 190-9180 ;
Web site-
www.dekolink.com
r
Email-marketing@dekolink.com
02
ev 5 11/
page 3 of 12
;
TO
BASE
Attenuator
LNA
Power
Downlink
PA
AGC
Duplexer
Monitor
BDA RF BLOCK DIAGRAM
Step Attenuator & RF Gain Setting
AGC
Attenuator
Uplink
PA
TO
MOBILE
Power
Monitor
Duplexer
LNA
For proper operation of the BDA; the isolation between the base station antenna
and the mobile antenna should exceed the BDA gain by at least 12 dB. If the
BDA gain were higher than the isolation between the antennas, oscillation would
start and would saturate the amplifier. Isolation few dB higher than the BDA gain
cannot start oscillations but would cause gain ripple in the band.
The step attenuator on the low noise amplifier can reduce the BDA gain. The
BDA gain can be stepped down by the amount indicated on the step attenuator.
Dekolink Wireless Ltd.;16 Bazel St.Qiryat-Arieh Petah-Tikva Israel, 49510
Tel- 972-3-9180-180; Fax-972-3- 190-9180 ;
Web site-
www.dekolink.com
r
Email-marketing@dekolink.com
02
ev 5 11/
page 4 of 12
;
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