Dekolink Wireless CBDATDMAB1W60 MW-CBDA-TDMAB-1W60-A Cellular Bi-Directional Amplier User Manual Installation and operating instructions

Dekolink Wireless Ltd MW-CBDA-TDMAB-1W60-A Cellular Bi-Directional Amplier Installation and operating instructions

Installation and operating instructions

Wireless Solutions48 Mivtza Kadesh St. Bene Beraq 51203 , ISRAEL Tel: +972-3-6175639 Fax:+972-3-6175962trm1@elisra.comINSTALLATIONANDOPERATING INSTRUCTIONSFORMW-CBDA-TDMAB-1W60-ACELLULAR BI-DIRECTIONAL AMPLIFIER
Wireless Solutions48 Mivtza Kadesh St. Bene Beraq 51203 , ISRAEL Tel: +972-3-6175639 Fax:+972-3-6175962trm1@elisra.comTABLE OF CONTENTSPARAGRAPH PAGE NoBDA OVERVIEW 3BLOCK DAIGRAM DESCRIPTION 3BDA OPERATION 4AGC & MGC FUNCTION 5RF EXPOSURE WARNING 6ELECTRICAL SPECIFICATIONS 7MECHANICAL SPECIFICATIONS 7ENVIRONMENTAL CONDITIONS 7LIST OF DRAWINGSDRAWING PAGE NoBDA (WITH AGC) RF BLOCK DIAGRAM DRAWING 4AGC & MGC CONTROL 5MECHANICAL OUTLINE 8
Wireless Solutions48 Mivtza Kadesh St. Bene Beraq 51203 , ISRAEL Tel: +972-3-6175639 Fax:+972-3-6175962trm1@elisra.comBDA OVERVIEW:The Bi-Directional Amplifier (BDA) assembly provides an exceptional repeater/booster performances toextend 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 linearityperformances. The unit is based on a duplexed path configuration, having sharp out of band attenuationfor improved isolation between the receiving and transmitting paths.BLOCK DIAGRAM DESCRIPTION:The CBDA Downlink path receives the RF signals from base station amplifies them and transmits themto the subscriber. The BDA Uplink path receives the RF signals from the subscriber amplifies them andtransmits them to the base station. Two duplexers frequency separate the signals to the properamplifying path and isolate the two signals.For each path there is an AGC amplifier. The amplifier has an AGC option switch. When switched on,the AGC circuit limits the amplifier output power. The AGC circuit senses the output power andintroduces more attenuation, when the output power exceeds the preset level. This way the gain of theamplifier is reduced, its output power is limited and the intermodulations products are kept below thedesired level.In this manner the output power cannot exceed the +24 dBm preset power and the IMD levels are13 dBm.The AGC amplifier has a Power LED lamp that illuminates when the output power has reached thepreset power limit.In addition the BDA has a trimmer that enables continuos reduction of the gain by 15 dB.
Wireless Solutions48 Mivtza Kadesh St. Bene Beraq 51203 , ISRAEL Tel: +972-3-6175639 Fax:+972-3-6175962trm1@elisra.comBDA with AGC & MGCDETAILED RF BLOCK DIAGRAMBDA OPERATIONconnected to the antenna pointing into the area to be covered by the BDA.The isolation between the base station antenna and the mobile antenna should be at least 12 dB higherthan the BDA gain. If the isolation were less than the BDA gain, oscillation would start and wouldsaturate the amplifier. Isolation few dB higher than the BDA gain cannot start oscillations but wouldcauses gain ripple in the band.'RZQOLQN8SOLQN72%$6(67$7,21$17(11$72$5($$17(11$17<3(17<3(
Wireless Solutions48 Mivtza Kadesh St. Bene Beraq 51203 , ISRAEL Tel: +972-3-6175639 Fax:+972-3-6175962trm1@elisra.comAGC & MGC FUNCTION The BDA has AGC function. Their amplifier has a directional coupler and a detector at the output of thehigh power amplifier to monitor the output power. When a high signal is received the automatic levelcontrol detects the amplitude and sends a feedback signal to a voltage variable attenuator whichattenuates the signal level so that the output power of the amplifier does not exceed the preset limit. TheLED on the amplifier illuminates when the power out the amplifier is within the set limit (both when theAGC 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 givesmaximum gain.MGC: The RF gain of the BDA can be reduced by about 15 dB using the continuos trimmer on theamplifier. The RF gain is at maximum when the trimmer is at anti-clockwise direction. To reduce thegain, turn the trimmer clockwise using a screwdriver. Turning it halfway would reduce the gain by 7.5 dB.The AGC and MGC functions for the uplink path are reached by opening a small cover located on theDBA side adjacent to the Mobile antenna port. For the downlink path the window is located on the sidenear the Base antenna port. Note: The BDA is shipped with the AGC switch in the OFF position and maximum RF gain. AGCEnableSwitchPowerOutLEDGain ControlTrimmer(MGC)AGC & MGC CONTROL(Control Window Located at BDA sides)
Wireless Solutions48 Mivtza Kadesh St. Bene Beraq 51203 , ISRAEL Tel: +972-3-6175639 Fax:+972-3-6175962trm1@elisra.comRF EXPOSURE WARNINGIn order to satisfy the FCC RF exposure requirements, you must ensure that theinstallation complies with the following:One antenna is connected via cable that has typical 1~10 dB attenuation (depends onthe length of the cable) to the BDA BASE port. This antenna is installed outdoor andhas very sharp beam (Yagi type or similar) pointed to the donor (BTS). This type ofantenna 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 installedto provide a minimum separation distance of 0.3 m (30 cm) from persons within thearea.The second antenna is connected via cable that has typical 1~10 dB attenuation(depends on the length of the cable) to the CBDA MOBILE port. This type of antennais omnidirecttional (isotropic), or wide beam, with 0 to 2 dBi typical gain and is installedand distributes indoor (in buildings, tunnels, basements, park lots, shopping centersetc.). Typical specifications: gain: 2 dBi, VSWR: better than 2:1 , Impedance: 50 ohm.The indoor antenna must be installed to provide a minimum separation distance of 0.2 m (20 cm) from persons within the area.
Wireless Solutions48 Mivtza Kadesh St. Bene Beraq 51203 , ISRAEL Tel: +972-3-6175639 Fax:+972-3-6175962trm1@elisra.comELECTRICAL SPECIFICATIONS:Frequency Range Up Link : 835 849 MHzDown Link : 880 894 MHzPassband Gain @ min attenuation 60 dB minimumPassband Ripple 1.5 dB typicalOutput Power AGC Set +24 1 dBmAGC Dynamic Range 30 dB minMGC (Manual Gain Control) Dynamic Range 15 dB minNoise Figure @+25 C at max gain 6.0 dB max3rd Order Intercept point +45 dBm typicalIMD @2 tone @+20 dBm/carrier 50 dBc typicalIsolation between Up/Down Link 75 dB minImpedance Level 50 OhmsVSWR 1.5 : 1 maxPower Supply 80 to 240 VAC; 50 to 60 Hz; @500 mAMECHANICAL SPECIFICATIONS:Size : 10 x 10 x 5 inch approx. (250 x 250 x 120 mm approx.)RF Connectors : N-type FemaleWeight : 15 Lbs. (7 kg.) approx.ENVIRONMENTAL CONDITIONS:The unit is designed for indoor applications:Operating temperature : - 30 C to + 50 CStorage temperature : - 50 C to + 80 C
Wireless Solutions48 Mivtza Kadesh St. Bene Beraq 51203 , ISRAEL Tel: +972-3-6175639 Fax:+972-3-6175962trm1@elisra.comMECHANICAL OUTLINE

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