60 GOUGH ROAD, MARKHAM, ONTARIO L3R 8X7 Tel: (905) 940-1400 Toll Free: 888-86KAVAL Fax: (905) 946-3392 http://www.kaval.com USER MANUAL FOR BI-DIRECTIONAL AMPLIFIERS 800 & 900 MHz MODEL BDA-1000 DCM000000001 Revision 1, May 27, 1999 l Page 1 Kaval Telecom Inc.
TABLE OF CONTENTS • • • • • • • FCC NOTICE INTRODUCTION BLOCK DIAGRAM TECHNICAL SPECIFICATIONS MULTIPLE CHANNEL AMPLIFICATION POWER DE-RATING REQUIREMENTS BOOSTER AUTOMATIC GAIN CONTROL (AGC) FUNCTIONAL DESCRIPTION BDA CONTROLLER OPERATION • BDA Controller User Interface • • LED and Audible Indicators: Controls: • • • • Current Monitor Status Thermal Monitor Status AGC Status Master Status • • • • • • • • • • Main Menu Gain Menu Uplink & Downlink Booster Menus Uplink and Downlink PA Menus AGC Menu Tem
• FCC NOTICE l Page 3 Kaval Telecom Inc.
• INTRODUCTION This 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 office buildings, shopping malls, hospitals, tunnels etc.
• BLOCK DIAGRAM DOWNLINK DIRECTION BOOSTER #1 REJECT FILTER #1 COOLING FANS PA #1 HP HP 28V POWER SUPPLY ROOF TOP ANTENNA BDA CONTROLLER IN BUILDING ANTENNA LP LP PA #2 VENTILATION REJECT FILTER #2 TERMINAL BLOCK UPLINK DIRECTION BOOSTER #2 VENTILATION AC POWER INPUT Power and Control Connections RF Connections ------____ BDA Controller : Temp Sense & Cooling Fans : 28V Power Supply : Duplexers : Reject Filters : Boosters : An enclosed unit with microcontroller, LED indicators, buttons, an
• TECHNICAL SPECIFICATIONS The BDA provides for both directions a nominal 65dB gain Booster and a 15dB gain Power Amplifier (PA). The linear Booster has a 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 31 dB range, and an Automatic Gain Control (AGC) provides an additional 23 dB range. The isolation between the uplink and downlink paths is provided by two high performance bandpass Duplexers.
• MULTIPLE CHANNEL AMPLIFICATION POWER DE-RATING REQUIREMENTS BDA’s will amplify all signals that fall within their Pass-Band range. The output power will be “shared” between all channels being amplified. Another multiple channel effect is Intermodulation - off-channel signals produced from non-linear effects between the intended channel signals. These may cause interference to receiving equipment. In order to minimize Intermodulation off-channel signals, Power De-rating must be applied.
• BDA CONTROLLER OPERATION The BDA Controller is a microprocessor based part of a Kaval BDA that provides all control, fault monitoring, and settings for the BDA. It interfaces to the 28 VDC Power Supply, the optional 24 VDC Battery (both monitoring, transferring, and charging), control signals 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.
• 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 backup capacity remaining. This may occur as a result of normal discharge in a backup situation, Battery exceeding its useful life, or a Battery failure such as water loss or shorted cell.
• Status Displays The BDA Controller’s Display normally shows one of 4 Status Displays. Pressing the Adjust Buttons sequences through the 4. Pressing the Select Button from any status screen enters the Main Menu. Pressing the Exit Button does nothing, except when a Fault condition exists and Exit Button clears the fault. If a Fault occurs, the display switches to the Master Status display and shows a text message for the Fault(s).
Fault Displays include ; Up Boost Overcurrent Dn Boost Overcurrent Up Boost Undercurr. Dn Boost Undercurr.
• Gain Menu The gain menu allows adjustment of overall System Gain in dB for each direction. These functions take into account programmed module gain values entered by the user, or entered during factory calibration. The values it considers include Booster maximum gain and PA gain. These gains must be entered in the appropriate menus and must account for system cable and duplexer losses. Invalid gains cannot be called up. Gain is set in 1 dB increments.
• Uplink and Downlink PA Menus The 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: Output: Max Current: Min Current: Max Gain: Interlock • Yes 10dBm 1.00A 0.25A 12 dB AGC Menu The AGC Menu allows the user to turn AGC on or off. The AGC target is set in terms of equivalent single carrier output level at BDA antenna terminal.
• Battery This Menu allows the user to tell the controller whether a backup battery is installed (Yes/No), and allows setting of battery voltage thresholds. If not installed, then no battery faults will signal, and no voltage display is shown. Battery Menu Batt. Installed? Yes Low Voltage: 24.0 Warn Voltage: 21.5 Cutoff Voltage: 21.0 • Controller Menu This Menu allows the user to display the Software Revision, change the Password, perform a Lamp Test, control the Buzzer and reset to Factory Settings..
• INSTALLATION l l l l l l l Upon receiving the BDA shipment, examine the packaging and the Cabinet for damage. Each BDA is carefully packaged for air shipment. Any damage incurred during the transportation must be claimed from the shipper. The BDA is fully contained in a single Nema-style wall mountable cabinet. Prior to installing the Roof Top Antenna and the Distribution Antenna System make sure that enough Antenna Isolation.
• TROUBLESHOOTING BDA 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 functioning properly. • Maintenance & Safety The BDA has been engineered for easy maintenance and for safe operation. This has been achieved as follows : l l l l l The 28V DC Power-supply is over-rated for actual requirements.
