Powerwave Technologies BDA1200 Bi-Directional Amplifier, Model BDA1200 User Manual Manual

Powerwave Technologies Inc. Bi-Directional Amplifier, Model BDA1200 Manual

users manual

l Page 1Kaval Telecom Inc. DCM00000000160 GOUGH ROAD, MARKHAM, ONTARIO L3R 8X7Tel: (905) 940-1400 Toll Free: 888-86KAVAL Fax: (905) 946-3392http://www.kaval.comUSER MANUAL FORBI-DIRECTIONAL AMPLIFIERS800 & 900 MHzMODEL BDA-1000DCM000000001Revision 1, May 27, 1999
l Page 2Kaval Telecom Inc. DCM000000001TABLE OF CONTENTS•FCC NOTICE 3•INTRODUCTION 4•BLOCK DIAGRAM 5•TECHNICAL SPECIFICATIONS 6•MULTIPLE CHANNEL AMPLIFICATION POWER DE-RATING REQUIREMENTS 7•BOOSTER AUTOMATIC GAIN CONTROL (AGC) FUNCTIONAL DESCRIPTION 7•BDA CONTROLLER OPERATION 8•BDA Controller User Interface 9•LED and Audible Indicators: 9•Controls: 9•Status Displays 10•Current Monitor Status 10•Thermal Monitor Status 10•AGC Status 10•Master Status 10•Menus 11•Main Menu 11•Gain Menu 12•Uplink & Downlink Booster Menus 12•Uplink and Downlink PA Menus 13•AGC Menu 13•Temperature Menu 13•Fan Select 13•Battery 14•Controller Menu 14•Calibration Menu 14•INSTALLATION 15•FIELD ADJUSTMENTS 15•TROUBLESHOOTING 16•Maintenance & Safety 16•Maintenance Philosophy 16•Troubleshooting Procedure 16
l Page 3Kaval Telecom Inc. DCM000000001• FCC NOTICE
l Page 4Kaval Telecom Inc. DCM000000001• INTRODUCTIONThis Operator’s Manual covers the use, operation and installation of the BDA-1000 800 & 900 MHz Bi-Directional Amplifiers(BDA’s). BDA’s are intended to extend radio frequency coverage into areas with coverage deficiency such as inside officebuildings, shopping malls, hospitals, tunnels etc. They are designed to be located independent of the Donor Transceiver Site andare equipped with their own antenna systems - one to communicate with the Donor Transceiver Site and the other(s) tocommunicate with radio equipment in the area with coverage deficiency.For proper BDA System operation with no feedback problems, the RF isolation between the roof top antenna and the indoorantenna(s) must exceed the net system gain by at least 12 dB. Note that the net system gain takes into account the BDA gain,antenna gain, cable & connectors losses.ROOF TOP ANTENNASIGNALTAPFROM / DONORTRANSCEIVERDN-1DNF1 BF2KAVALBDASIGNALTAPCOAXCABLE
l Page 5Kaval Telecom Inc. DCM000000001• BLOCK DIAGRAMREJECT FILTER #2UPLINK DIRECTIONIN BUILDINGANTENNAHPANTENNACOOLING FANSVENTILATIONINPUTAC POWERTERMINAL BLOCKVENTILATIONBDASUPPLY28V POWER CONTROLLERROOF TOPHPLPLPDOWNLINK DIRECTIONPA #1REJECT FILTER #1PA #2BOOSTER #1BOOSTER #2Power and Control Connections -------RF Connections ____BDA Controller : An enclosed unit with microcontroller, LED indicators, buttons, and two-line display.Temp Sense & Cooling Fans : Controlled by the BDA Controller to ensure safe and reliable operation.28V Power Supply : Providing all DC Power, with optional Gell-Cell Battery Backup.Duplexers : Isolating Downlink and Uplink Frequencies, and coupling to antennas.Reject Filters : Installed if required to eliminate feedback.Boosters : High Gain (11 to 65 dB) Linear Amplifiers supplying up to 1 Watt of RF Power. Thebasic gain is adjustable via the BDA Controller over a 33 to 65 dB range, and anAutomatic Gain Control (AGC) provides an additional 23 dB range.PA Power Amplifiers : Optional Linear Power Amplifiers providing 15 dB of additional gain, and up to 20 Wattsof RF Power.
l Page 6Kaval Telecom Inc. DCM000000001• TECHNICAL SPECIFICATIONSThe BDA provides for both directions a nominal 65dB gain Booster and a 15dB gain Power Amplifier (PA). The linear Booster hasa high gain range of 11 to 65 dB supplying up to 1 Watt of RF Power. The basic gain is adjustable via the BDA Controller over a 31dB range, and an Automatic Gain Control (AGC) provides an additional 23 dB range. The isolation between the uplink and down-link paths is provided by two high performance bandpass Duplexers.RF Performance Downlink UplinkFrequency Range As per Band requirements and Duplexer: Trunking: 851-869 MHz Cellular: 869-891.5 MHz Cellular: 880-894 MHz Trunking: 935-941 MHzPlease consult Kaval for other 800-960MHz band options.As per Band requirements and Duplexer: Trunking: 806-824 MHz Cellular: 824-846.5 MHz Cellular: 835-849 MHz Trunking: 896-902 MHzPlease consult Kaval for other 800-960MHz band options.Nominal Max. Gain 65 dB with Booster only80 dB with Booster & PAGain Adjustment 31dB (in 1dB steps)1 dB Compression Point +27 dBm with Booster only+40 dBm with Booster & PA3rd Order Intercept Point IP3 +37 dBm with Booster only+50dBm with Booster & PAImpedance 50 ohms NominalVSWR 1.5:1 MaxBDA Controller Features Microprocessor ControllerCurrent Monitoring for 2 Boosters, 2 PA’s, 2 FansFull Gain ControlBattery Backup Control & ChargingElectrical Primary AC Power Switchmode Universal 120/230V AC +/- 10%, 50-60HzTotal DC Current Drain Nominal 2 to 6 Amps @ 28 VDCBDA Controller 300 ma @ 28 VDC1W Boosters 650 ma @ 28 VDCFault thresholds Typically 200 ma and 900 ma20 Watt PA’s 1.5A @ 28 VDCFault thresholds Typically 160 ma and 1.8 ABatteries Two 12 VDC Sealed Lead -Acid Batteries, 10-100 AHBattery Backup Time: Boosters only, 20 AH - 8 hrs TypicalBattery Backup Time: Boosters & PA’s, 100 AH - 8 hrs TypicalCharge Time: 10 AH - Approx. 6 hrs, 100 AH - Approx. 48 hrs. TypicalCharge Current from BDA Controller is 3 Amps MaximumThe BDA will shut down for Battery Voltages below 21 VDC.Mechanical Dimensions W x H x D 20” x 24”x12”Weight 100 lbs. approx.Housing Rugged Nema-Style Cabinet - Wall MountableConnectors N female
l Page 7Kaval Telecom Inc. DCM000000001• MULTIPLE CHANNEL AMPLIFICATION POWER DE-RATING REQUIREMENTSBDA’s will amplify all signals that fall within their Pass-Band range. The output power will be “shared” between all channels beingamplified. Another multiple channel effect is Intermodulation - off-channel signals produced from non-linear effects between theintended channel signals. These may cause interference to receiving equipment.In order to minimize Intermodulation off-channel signals, Power De-rating must be applied. In the USA there are FCCIntermodulation Specifications published in the EIA Standard PN2009. The Tables below give the maximum per channel OutputLevels allowed as a function of the number of channel.Note that depending on the actual amplifier input levels, the gain of the BDA may need to be reduced to comply with the aboveregulations.Number of Channels Maximum Output Power per Single Channel for Uplink or DownlinkUsing both a Booster and PA1+40.0 dBm2+28.7 dBm4+24.0 dBm6+21.3 dBm8+19.5 dBm10 +18.1 dBmNumber of Channels Maximum Output Power per Single Channel for Uplink or DownlinkUsing only a Booster1+27.0 dBm2+20.1 dBm4+15.4 dBm6+12.7 dBm8+10.8 dBm10 +9.4 dBmNote: Above levels are established with AGC disabled. De-ratings are based on values calculated using EIA standardPN2009. Actual Amplifier performance may exceed the above criteria.• BOOSTER AUTOMATIC GAIN CONTROL (AGC) FUNCTIONAL DESCRIPTIONBoth Downlink and Uplink paths, with Boosters only, or with Boosters and PA’s, are equipped with AGC. The Booster based AGChas a dynamic attenuation range that maintains a factory set composite output nominal power of +23.2 dBm at the Booster output.The AGC gain varies dynamically to maintain this level and limits strong signal levels that could cause more Intermodulation. TheAGC starts to turn on at +23.2 dBm, therefore, at a gain setting of 70 dB, the AGC will start to turn on at +23.2 – 70 = -46.8 dBminput level, and would maintain the +23.2 dBm output at an input levels higher than –46.8 dBm. Below the AGC turn-on threshold,the output level will decrease linearly with the input signal. With a PA installed in the path, the AGC maximum output level is 15 dBhigher.
l Page 8Kaval Telecom Inc. DCM000000001• BDA CONTROLLER OPERATIONThe BDA Controller is a microprocessor based part of a Kaval BDA that provides all control, fault monitoring, and settings for theBDA. It interfaces to the 28 VDC Power Supply, the optional 24 VDC Battery (both monitoring, transferring, and charging), controlsignals to the Boosters, and provides monitored DC power for the Boosters and PA’s. Overall dimensions of the case are 9”(including flanges) x 3.5” x 1.25”. The heatsink extends about 1.75 inches above the case and is 4 inches wide.BDA OKBATT PAAGCBOOST PADOWNLINKUPLINKBDA CONTROLLERPWR FAIL TEMP FANONOFFPOWEREXITSELECTADJUSTBATT BOOSTThe BDA Controller display is a 2 line by 20 character Vacuum Fluorescent (VFD) display. The connectors are all secure locktypes and should only be plugged and unplugged by a service technician.
l Page 9Kaval Telecom Inc. DCM000000001• BDA Controller User Interface• LED and Audible Indicators:PWR FAIL Lights if primary power fails, and the system is on Battery Backup.BATT Lights when the Battery (if installed) voltage drops below 24 VDC which roughly indicates 50% of backupcapacity remaining. This may occur as a result of normal discharge in a backup situation, Batteryexceeding its useful life, or a Battery failure such as water loss or shorted cell.In addition, while running on Battery Backup, If the Battery drops below 22 VDC, the LED will begin to blinkindicating that self-shutdown is imminent. If the Battery drops below 21 VDC the BDA will shut downcompletely to protect the Battery from damaging deep discharge.UPLINK BOOST Lights if the Uplink Booster is enabled and has an overcurrent, undercurrent, or internal fault.UPLINK PA Lights if the Uplink PA (Power Amplifier) is enabled and has an overcurrent, undercurrent, or internal fault .DNLINK BOOST Lights if the Downlink Booster is enabled and has an overcurrent, undercurrent, or internal fault.DNLINK PA Lights if the Downlink PA is enabled and has an overcurrent, undercurrent, or internal fault .UPLINK AGC Lights to indicate that an Input Signal of sufficient strength is present to cause the AGC circuit (if enabled)to act to reduce gain. The level at which AGC action occurs is not a fixed signal level. It depends upon theuser setting for output level target. When lower targets are set, the AGC will begin to act at lower inputlevels. When AGC is disabled, the LED does nothing. If the Input Signal exceeds the AGC ability to reducegain, an overload condition exists, and the AGC LED blinks rapidly.DNLINK AGC Operates the same as the Uplink AGC LED, but for the Downlink.TEMP Lights when the BDA system temperature, as detected by a digital sensor in the fault monitor, exceeds theuser programmed high temperature threshold.FAN Lights when the Cooling Fan(s) (if enabled) have an overcurrent or undercurrent condition.BUZZER The Buzzer sounds briefly during button presses for audible feedback. Where a User Function requires aconfirmation, a short beep is emitted. During a Fault Condition, a long periodic beep is sounded (this canbe disabled). When the Battery is about to be depleted when on Battery Backup Power, the Buzzer willsound continuously.• Controls:ON/OFF Power Switch for turning the BDA operation on and off. Note that this only controls the BDA Controller,Boosters, PA’s, and Fans; the DC Power Supply is still operating.SELECT This Button is used to enter the Main Function Menu and Submenus, and where applicable to confirm aFunction selection chosen with the Adjust Buttons.EXIT This Button is used to cancel any Function changes, reverting to previous settings. If a Fault has occurredand its Status is displayed, pressing the Exit Button clears the fault.ADJUST These buttons Scroll up and down between Status, Function, and Menu display items. They also adjustprogrammable numeric values up and down.
l Page 10 Kaval Telecom Inc. DCM000000001• Status DisplaysThe BDA Controller’s Display normally shows one of 4 Status Displays. Pressing the Adjust Buttons sequencesthrough the 4. Pressing the Select Button from any status screen enters the Main Menu. Pressing the Exit Buttondoes nothing, except when a Fault condition exists and Exit Button clears the fault. If a Fault occurs, the displayswitches to the Master Status display and shows a text message for the Fault(s).• Current Monitor StatusThis Screen displays the current drawn by each Booster and PA in the system. The top row shows abbreviatednames for the amplifiers, the bottom row shows the current being drawn by each module. Entries for modulesdisabled by another module’s fault show “Dsbl”. Entries for modules that are manually disabled are blank. Modulesthat have a fault have their current indication blinking. If an overcurrent has occurred, then the word “Over” appearsinstead of a number.Up-B Up-P Dn-B Dn-P0.65 Over 0.60 2.35• Thermal Monitor StatusThis Screen shows current temperature fan and battery status. Temperature readout is in degrees Celsius. If anover-temperature condition exists, temperature will flash. Each fan has an indication of On, Off or Fail. Batteryvoltage is displayed in volts to a resolution of 10 mV. If battery is not installed, display says “None” Battery voltageflashes if it is low.Temp FanA FanB Batt 53C ON Fail 26.25• AGC StatusThis Screen displays data about AGC operation and current gain setting. If AGC is disabled, then the readout for thatdirection shows “Off” (*). If AGC is enabled, but input signal is below minimum input level for AGC action, readoutshows “Ok”. If AGC is enabled, and AGC is acting, then readout shows equivalent single carrier input level for thatdirection in dBm. (*) If AGC is enabled, and amplifier is overdriven, readout shows blinking “Over” (*).GN-UP-AGC GN-DN-AGC65dB Dsbl 78dB 23dB• Master StatusThis Screen shows normally ;BDA OKIf a Fault occurs, then a display such as ;Fault!OvertemperatureWill be shown.
l Page 11 Kaval Telecom Inc. DCM000000001Fault Displays include ;Up Boost Overcurrent Up PA OvercurrentDn Boost Overcurrent Dn PA OvercurrentUp Boost Undercurr. Up PA UndercurrentDn Boost Undercurr. Dn PA UndercurrFan A Fail Fan B FailBattery Low Imminent ShutdownPrimary Power Fail OvertemperatureUp Boost Internal Up PA InternalDn Boost Internal Dn PA InternalExternal Fault Controller FaultCalibration Fail Up Boost EEPROMDn Boost EEPROM Uplink OverdriveDownlink Overdrive RS-232 Active• Menus• Main MenuThe Main Menu is entered by pressing the Select Button from any Status Display. If the Password is set to anythingbut 000 (default), then a Password Entry Screen appears. The user uses the Adjust Buttons to select a digit, andpresses the Select Button to enter that digit. The cursor moves to the next digit and enters it. When the third digit isentered, and the Password is correct, the Main Menu becomes available. If an incorrect Password is entered, then themessage “Wrong Password” appears for a few seconds and the user must start again. If the Password is set to 000(disabled) the Main Menu is available immediately.Enter Password4**Main Menu entries are used to group Functions by category. The User selects the Category and a Sub-Menu appearslisting available Functions. While in the Main Menu, the top row of the display shows “Main Menu”, and the bottom rowshows the Sub-Menu headings as one scrolls through them. When a Sub-Menu is selected, the Sub-Menu headingreplaces the Main Menu heading in the top row, and the bottom row then shows the Sub-Menu entries. If no Buttonsare pressed for 5 minutes while in any Menu the Display reverts to the last Status Display.Available main Menu entries are:Gain Uplink BoosterUplink PA Downlink BoosterDownlink PA TemperatureFans BatteryController Calibration
l Page 12 Kaval Telecom Inc. DCM000000001• Gain MenuThe gain menu allows adjustment of overall System Gain in dB for each direction. These functions take into accountprogrammed module gain values entered by the user, or entered during factory calibration. The values it considersinclude Booster maximum gain and PA gain. These gains must be entered in the appropriate menus and mustaccount for system cable and duplexer losses. Invalid gains cannot be called up. Gain is set in 1 dB increments.Gain menu entries (typical) are:Uplink Gain: 80dBDownlink Gain:75dB• Uplink & Downlink Booster MenusThese Menus allow programming of Booster parameters. Current program range is up to 1 Amp. If max current isreduced below the minimum current setting, the minimum current setting is pushed down automatically, and kept50mA less than the max current setting. If the minimum current setting is raised above the maximum current setting,the maximum current setting is pushed up and kept 50 mA higher. Current settings use 50 mA increments. Maximumgain setting is 80 dB. This applies to Booster gain, not System Gain. Booster Gain entries should account for lossesbefore the booster. Menu selections are as follows (with typical data):Enable: YesMax Current: 1.00AMin Current: 0.25AMax Gain: 70 dBInterlockThe Interlock entry, if selected, calls up a Sub-Menu that allows the user to select what modules are disabled ifthe Booster has a fault. In this menu, the top row shows:Up Boost InterlockThe bottom row shows one of the other module names followed by Yes or No, which are toggled using the scrollkeys.. The Interlock entries for the other amplifier modules operate in a similar manner. If all interlocks are off,then no deliberate shutdown occurs, and the fault detection is used for indication only.Uplink Boost: YesUplink PA: YesDownlink Boost:YesDownlink PA: Yes
l Page 13 Kaval Telecom Inc. DCM000000001• Uplink and Downlink PA MenusThe PA Menus are almost identical to the Booster menus except current programming range is up to 5 Amps.Maximum gain setting is 40 dB. Entries are as below:Enable: YesOutput: 10dBmMax Current: 1.00AMin Current: 0.25AMax Gain: 12 dBInterlock• AGC MenuThe AGC Menu allows the user to turn AGC on or off. The AGC target is set in terms of equivalent single carrieroutput level at BDA antenna terminal. AGC menu entries are:Uplink AGC: OnUplink Output:+22dBmDownlink AGC: OffDownlink O/P: +5dBm• Temperature MenuThis Menu allows setting of the over-temperature threshold and recovery temperature threshold. The recoverytemperature is the temperature that the system has to cool down to for Boosters and PA’s to be re-energized. A thirdmenu item allows user to select whether an over-temperature will actually cause a system shutdown. Menu entriesare:Temp Limit: 60CRecovery Temp: 40CTemp Shutdown: Yes• Fan SelectThis is a single entry Menu which allows selection of the primary fan. Allowable entries are Off, A, B and Both. If A isselected, then a fan A failure energizes fan B. If B is selected, fan A energizes in case of fan B failure. If both areselected, both fans are on all the time. If A or B are selected, then the second fan comes on if an over-temperaturefault occurs, and stays on until the recovery temperature is reached.Main MenuFan Select: A
l Page 14 Kaval Telecom Inc. DCM000000001• BatteryThis Menu allows the user to tell the controller whether a backup battery is installed (Yes/No), and allows setting ofbattery voltage thresholds. If not installed, then no battery faults will signal, and no voltage display is shown.Battery MenuBatt. Installed? YesLow Voltage: 24.0Warn Voltage: 21.5Cutoff Voltage: 21.0• Controller MenuThis Menu allows the user to display the Software Revision, change the Password, perform a Lamp Test, control theBuzzer and reset to Factory Settings.. Pressing select key with Lamp test shown causes a test pattern to be shownon the VFD, and all LEDs light up all at once, then are lit individually in sequence. If the Factory Defaults function isselected, a confirmation screen appears asking the user to toggle the entry to yes and hit select before memory iscleared. Selecting “Set Password” allows user to enter a new password. The entry must be made a second time toconfirm. In this case, display says “Confirm password”. If password is set to 000, then no password check is done(factory default). If password is forgotten, then EEPROM in controller must be replaced. Controller menu entries are:Software Rev: 1.3Set PasswordLamp Test:Beep: YesFactory Defaults?Yes• Calibration MenuThis Menu is for future use by the Kaval Factory only, and should not be used.
l Page 15 Kaval Telecom Inc. DCM000000001• INSTALLATIONlUpon receiving the BDA shipment, examine the packaging and the Cabinet for damage.lEach BDA is carefully packaged for air shipment. Any damage incurred during the transportation must be claimed from theshipper.lThe BDA is fully contained in a single Nema-style wall mountable cabinet.lPrior to installing the Roof Top Antenna and the Distribution Antenna System make sure that enough Antenna Isolation. Ifthere is insufficient Isolation between the antennas, the amplifier gain must be set to a minimum of 12dB lower than theavailable Antenna Isolation. As a rule, this is easily achievable with in-building installation.lCheck for and remove all packing materials prior to installing this unit.lThe physical installation is accomplished by mounting the enclosure onto a vertical wall. Ensure that the unit is mounted in theupright position, as indicated by the upright Kaval logo and the door hinge on the left side of the housing. Four mounting lugson the enclosure provided for this purpose. The cabinet is equipped on the left and right sides with an intake ventilation air atthe bottom and exhaust fan at the top. Ensure that free air flow is available on both sides of the cabinet.lThe AC electrical wiring is accessible via an opening at the bottom left hand side of the cabinet. The AC Terminal Strip isprovided at the bottom of the cabinet:Connection North American Standard Color CodeHot Line BLACKNeutral Line WHITEGround connection BAREIt is highly recommended that AC Power Wiring be performed by a qualified Electrician so as to ensure compliance with allNational and Local Electrical Wiring Regulations.lAC Power and RF Connections should be installed with all standard installation practices for lightning protection. This includesthe grounding and electrical bonding together of all equipment racks and cabinets in the room. It also includes a grounding ofthe primary antenna cable and the installation of proper surge suppression (lightning arrestor) equipment at the entrance to theequipment room.lConnect the Roof Top Antenna feeder cable to the “Donor Cell Site” Antenna.lConnect the Distribution Antenna System feeder cable to the “In-building Antenna” port.lMake sure that the BDA Controller Power On/Off Switch is “Off”. Activate the circuit breaker or plug in the AC. The BDAController should light up momentarily then shut off. Turn the BDA Controller Power On/Off Switch to “On”. The BDAController screen should become active, and Cooling Fans should be running. Check the BDA Controller for any reportedFault conditions.• FIELD ADJUSTMENTSThe proper operation of the BDA in providing RF coverage extension is a function of not only the BDA, but also of proper systemsengineering including isolation measurements and in building RF distribution design. The most critical requirement for the BDAinstallation is that the isolation between the “Roof-Top” Antenna and the in-building Antenna distribution system exceed the overallBDA System Gain by at least 12dB. The actual gain requirement for each Installation must be determined by the available antennaisolation and the operational requirements determined by local Systems Engineering.Each BDA has a Factory determined minimum gain both for the Uplink and Downlink Paths. The final Path Gain from Antenna Portin to Antenna Port out, is set by the BDA Controller.Follow through the BDA Controller Menus to set all configurable items as are appropriate for the installation.
l Page 16 Kaval Telecom Inc. DCM000000001• TROUBLESHOOTINGBDA Field Failures are often due to reasons not related to the BDA’s themselves. Before attempting to troubleshoot the BDA,ensure that the Donor Repeater, the Portable Radios, Antennas and the in-building Distributed Antenna System are all functioningproperly.• Maintenance & SafetyThe BDA has been engineered for easy maintenance and for safe operation. This has been achieved as follows :lThe 28V DC Power-supply is over-rated for actual requirements.lBoosters are monitored for both Over-current and Under-current (most failures are sensed this way).lPA’s are monitored for both Over-current and Under-current (most failures are sensed this way).lCabinet temperature is monitored for excessive temperature.lComponents are easily removable via quick connect DC and RF connectors.• Maintenance PhilosophyField maintenance should require a screwdriver, a multi-meter, spares of each of the active BDA component parts, and a PortableRadio to monitor off the air signals. There is no requirement to have any test equipment to accomplish most service repairs.lAll BDA component parts have been designed for reliable long life operation.lThe BDA Controller performs ongoing extensive built in diagnostics.lCorrective action can often be taken without detailed technical knowledge or the need for any test equipment.• Troubleshooting ProcedureOnce it has been determined that the Donor Site and Portable Radio Equipment are performing satisfactorily, and the BDA itself issuspect, proceed as follows:1) Open the BDA door and observe the BDA Controller display. If none of the Status LED’s are lit, and there is nothingon the Display, then the AC Power and / or Battery Backup Power (if present) has been lost / disconnected, theBDA’s DC Power Supply has failed, or the BDA Controller itself has failed. Check the AC Circuit Breaker feeding theAC circuit that powers the BDA, or possibly the AC plug has been pulled. If AC is present, try turning it off, wait 1minute, then on again; this may clear a DC Power Supply internal thermal fuse that has tripped. Also check that thePower On/Off Switch on the BDA Controller is On. If AC power appears to be present, then check forapproximately 28 VDC from the BDA DC Power Supply. If there is no DC Voltage at the Power Supply terminals, ithas likely failed. from Also check for 22 to 28 VDC on the Battery terminals if present. If the BDA Controller still hasno lit LED’s or Display Status then the BDA Controller has likely failed.2) If the BDA Controller is functioning with any Fault Status indicated, then check the indicated failed component. Overor Under Current on Boosters, PA’s or Fans may mean that the power and/or control wiring to that component hasbeen disconnected or is broken, or that the component has failed and needs replacement. Suspected broken orfaulty cables should be disconnected and reconnected to see if the Fault clears.3) Over-temperature indications on the BDA Controller may occur as a result of failed Cooling Fans, blocked ventilationopenings, faulty over-heating Boosters or PA’s, or excessive ambient temperature (> 60oC).4) Other problems may include connector & cable failures or related problems, specification failure in a Booster or PA,etc. Problems of this sort are best referred to Kaval Service, or other supporting RF Test Lab.

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