Communication Components BDA-8087-52C Bi-Directional Amplifier model BDA-8087-52C User Manual BDA TEST AND INSTALLATION PROCEDURE1

Communication Components Inc Bi-Directional Amplifier model BDA-8087-52C BDA TEST AND INSTALLATION PROCEDURE1

Users Manual

BDA TEST AND INSTALLATION PROCEDURE1. INSPECTIONCAUTION: A minimum separation distance of 20centimeters between the transmit antenna andnearby persons must be maintained. If thisseparation distance is not maintained, the devicemay not be in compliance with FCC RF Exposurerules.Open the enclosure of the bi-directional amplifier (BDA) and carefully inspect the insideassembly of the unit.Verify that all components are properly secured to the base of enclosure, there are noloose parts, and all interconnections are reliable. Carefully close the enclosure.Unpack the outdoor and indoor antennas and inspect the content. Verify that there are noloose parts or rattling in the antennas. Make sure that antennas are not deformed.2. SITE INSTALLATION2.1 "Donor" (outdoor) Antenna InstallationOn the roof of the building chose the location of the "donor" Yagi antenna. Point theantenna towards the "donor" site. Connect the mobile phone or spectrum analyzer to theantenna using short cable with type "N" connector on the antenna side and proper adapteron the test equipment side. Adjust the position of the antenna for the maximum reading.The average power level should not be below -85 dBm. Record the measured data. Installthe antenna following instructions of the antenna manufacturer.CAUTION: A minimum separation distance of 20centimeters between the transmit antenna andnearby persons must be maintained. If thisseparation distance is not maintained, the devicemaynot be in compliance with FCC RF Exposure rules.CAUTIONUse caution working with the bi-directional amplifier.Disconnect the 115 VAC from the amplifier prior toinspection.
2.2 Surge Protector InstallationConnect the cable run to the antenna and pass it through the roof manifold. Inside of thebuilding find a location for the surge protector near the construction ground where it canbe reliably grounded.Install the surge protector and connect the cables to both sides. Bring the cable run to theBDA location. Using a spectrum analyzer or mobile phone, measure the signal from the"donor" site. It has to be from 1 dB to 3 dB below the antenna output level. Exact lossdepends on the cable type and length of the cable.2.3 Indoor Antenna (s) Installation.From preliminary evaluation of the blueprints of the service area, the approximatelocations of the indoor antennas must be established. The level of the signal at theboundary of the service area can be a guideline for the location of the antennas. Severalparameters must be considered:a) the gain of the Omni antenna is 0 dBd.b) the free space propagation loss is approximately -60 dB per 100 ft.c) the acceptable level at the lowest signal position for the mobile is -80 dBm.Following the installation instructions mount antennas at the ceiling tiles or any otherappropriate locations. Run the cables from antennas to the BDA location. Use powercombiner, if needed, to interconnect the antenna cables.CAUTION: A minimum separation distance of 20centimeters between the transmit antenna andnearby persons must be maintained. If thisseparation distance is not maintained, the devicemay not be in compliance with FCC RF Exposurerules.2.4 BDA Installation The bi-directional amplifier can be installed as a freestanding unit lying on the shelf ofthe cabinet or any other adequately strong support. It can also be secured by screws to thewall or rack using four holes in the tabs located at the back plate of the enclosure. ACpower must be available in the vicinity of the BDA. It is recommended that theenvironmental temperature will not exceed 65 C and the area will be adequatelyventilated.Once amplifier is installed in place, open the front door and verify that all internal partsare securely mounted. Connect the ground wire to the ground stud on the enclosure.Plug in the AC cable into the AC socket. The green light on the enclosure must be lit on.a) Downlink Gain Setting.Connect the cable from the lightning protector and “DONOR” antenna to the “DONOR”port of the BDA.Connect a power meter or spectrum analyzer to the "SERVICE" port (Uplink inputconnector) of the BDA. Measure the power of the signal at the “SERVICE” port of theBDA.
It should not exceed +24.8 dBm for a single channel or +19.5 dBm for three channelsof CDMA system application.It should not exceed +25 dBm for single channel or +19.3 dBm for three channels ofTDMA system application.These power levels will guarantee the intermodulation products below -13 dBm, which isin compliance with FCC regulation. After the output power level is set correctly, connectthe donor antenna cable to the "DONOR" port of the BDA.b) Uplink Gain Setting.Connect the indoor (service area) antenna cable to the "SERVICE" port of the BDA.Initiate the call from the closest position of the mobile to the service area antenna.Observe the yellow "Uplink AGC ON" light on BDA enclosure. The threshold of theAGC in the uplink amplifier is factory preset at the gain that corresponds to theintermodulation products level of -13 dBm. If the signal level is low and AGC light is not"ON", slowly increase the gain of the downlink amplifier until the light will be lit. Backoff the potentiometer just below the level when the light is off.Check the security of the installation and presence of the AC power. Amplifier is readyfor operation.3. REMOVE BI-DIRECTIONAL AMPLIFIER3.1 Unplug the AC cord from the socket. AC light on the amplifier must be off.Disconnect all coaxial cables.3.2 Dismount amplifier from the wall or remove it from the shelf.4. SHIPMENT AND STORAGE OF THE BDA4.1 Use common technical shop practices to ensure equipment protection during shipmentor storage. 5. TROUBLESHOOTING AND FAULT DETECTION5.1 Check the presence of the AC power. The AC light must be on.5.2 Check the continuity of all connecting cables. WARNING!110 VAC CAN BE LETHAL!ALWAYS UNPLUG THE AMPLIFIERBEFORE SERVICING THE INTERIOR..
5.3 If the fault was not located, remove the amplifier and send it to the manufacturer forrepair.5.4 RF testing of the amplifier is possible in the specially equipped laboratory.6. INFORMATION TO USERThis equipment complies with part 15 of the FCC rules. Any changes ormodifications to this product as well as usage outside of specified electricalparameters, which are not expressly approved by manufacturer, could void theuser’s authority to operate the equipment.

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