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Elisra MW-CBDA SERIES 10W-80-A, Installation And Operating Instructions Manual

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Elisra MW-CBDA SERIES 10W-80-A Installation And Operating Instructions Manual Download Page 4

 

 

Duplexer

Downlink

Duplexer

Uplink

LNA

Attenuator

Power

Monitor

PA

AGC

LNA

Attenuator

Power

Monitor

PA

AGC

BDA RF BLOCK DIAGRAM

TO

BASE

TO

MOBILE

 

Dekolink Wireless Ltd.;16 Bazel St.Qiryat-Arieh Petah-Tikva Israel, 49510 
Tel- 972-3-9180-180; Fax-972-3-

190

-

9180

; 

[email protected]

; 

Web site- 

www.dekolink.com

                        

r

ev 5     11/

02

                                                      page 4 of 12

                      

 

 

Step Attenuator & RF Gain Setting 

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. 

Summary of Contents for MW-CBDA SERIES 10W-80-A

Page 1: ...h Petah Tikva Israel 49510 Tel 972 3 9180 180 Fax 972 3 190 9180 Email marketing dekolink com INSTALLATION AND OPERATING INSTRUCTIONS FOR MW CBDA SERIES 10W 80 A COMPACT BI DIRECTIONAL AMPLIFIERS Web site www dekolink com rev 5 11 02 page 1 of 12 ...

Page 2: ...TENUATOR 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 B...

Page 3: ...th receives the RF signals from the subscriber amplifies them and transmits them to the base 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 attenu...

Page 4: ...or RF Gain Setting 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 T...

Page 5: ...n the power out the amplifier is within the set limit when the AGC is On and when the AGC is OFF The switch on the RF amplifier enables the AGC function If the AGC is disabled then the amplifier gives maximum gain AGC AND GAIN CONTROLS The AGC and GAIN SETTING functions for the up link path are reached by opening the small slide door located on the CBDA left side adjacent to the BASE antenna port ...

Page 6: ... base site Raise this antenna higher if no line of sight is achieved The required Base signals should be the dominant signals at least 6 dB higher power than other signals Choose the antenna site to get the maximum isolation from the remote mobile serving antenna MOBILE ANTENNA INSTALLATION REMOTE The remote antenna is an Omni antenna or a directional antenna according to the coverage requirements...

Page 7: ...or power has reached the BDA If the donor power is low the LED will not lit and the BDA usable power is not used efficiently 7 Set the uplink gain to the same as the downlink gain 8 Check that the uplink LED on the BDA monitor does not lit permanently This LED would lit permanently If the isolation between antennas is low BDA oscillations or the BDA is faulty 9 If the uplink LED light permanently ...

Page 8: ...base Increase BDA RFgain Downlink LED lights This is not a fault Indicates good power transmission in the downlink amplifier Make sure the amplifier is not overloaded Turn AGC on or reduce gain so that LED just turns from off to on Set the same gain for the uplink channel Uplink LED lights all the time Bad antenna isolation causing the repeater system to oscillate Improve the isolation between the...

Page 9: ... Set Power Level both at On and Off positions AGC Factory Power Preset Up link 24 dBm nom Down link 30 dBm nom Amplifier Power Output 1 dB Compression Up Link 1 Watts Down Link 10 Watts 3rd Order output Intercept point Up Link 45 dBm typical Down Link 50 dBm typical Power Supply 110 220V AC 50 60 Hz 1A System Frequency Range SYSTEM TYPE MODEL No DOWN LINK UP LINK E SMR iDEN MW CBDA ESMR 10W80A 851...

Page 10: ... Yagi type or similar pointed to the donor BTS This type of antenna has about 10 dBi gain Typical specifications gain 8 dBd 10 1 dBi VSWR better than 1 5 1 Impedance 50 ohm The outdoor antenna must be installed to provide a minimum separation distance of 0 5 m 50 cm from persons within the area The second antenna is connected via cable that has typical 1 10 dB attenuation depends on the length of ...

Page 11: ...link Wireless Ltd 16 Bazel St Qiryat Arieh Petah Tikva Israel 49510 Tel 972 3 9180 180 Fax 972 3 190 9180 Email marketing dekolink com Web site www dekolink com rev 5 11 02 page 11 of 12 MECHANICAL OUTLINE ...

Page 12: ...dalism or repaired or altered in any way that adversely affects its performance or reliability To obtain warranty service Purchaser may upon the prior written authorization of Dekolink or its authorizerd service representative return the defective Product to Dekolink s authorized service center All shipping and insurance charges are the sole responsibility of Purchaser and are not included in this...

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