INSTALLATION AND OPERATING MANUAL FOR BDA-8XX-0.5/0.
TABLE OF CONTENTS PARAGRAPH PAGE NO Mini-BDA OVERVIEW Mini-BDA BLOCK DIAGRAM DESCRIPTION Mini-BDA OPTIONS Mini-BDA BLOCK DIAGRAM DRAWING (Figure 1) ELECTRICAL SPECIFICATIONS FREQUENCY RANGES (Table 1) SYSTEM SPECIFICATIONS (Table 2) MECHANICAL CONNECTIONS ENVIRONMENTAL CONDITIONS Mini-BDA CONNECTIONS MECHANICAL OUTLINE DRAWING (Figure 3 & 3a) RF EXPOSURE WARNING Mini-BDA INSTALLATION Mini-BDA OPERATION MECHANICAL OUTLINE- ADJUSTMENT (Figure 4) DIAGNOSTICS GUIDE Page 2 3 3 3 4 5 6 6 7 7 7 8 9 10 11 12 13
Mini-BDA OVERVIEW: The Mini-BDA assembly extends the coverage area of radio communications in buildings and RF shielded environments. The Mini-BDA has dual RF paths to extend coverage in two distinct frequency bands. The unit features low noise figure and wide dynamic range. It is based on a duplexed path configuration with sharp out of band attenuation allowing improved isolation between the receiving and transmitting paths.
Figure 1 1. 2. 3. 4. 5. 6. Mini-BDA BLOCK DIAGRAM 1. Uplink Diplexer - has low pass band insertion loss and high selectivity. 2. Downlink Pre-amp - is a low noise amplifier that drives the Downlink MPA and offers 38dB Gain. 3. Downlink MPA – is a medium power amplifier with an ALC circuit which offers 40dB Gain. 4. Uplink MPA – is a medium power amplifier with an ALC circuit which offers 40dB Gain. 5. Uplink Pre-amp - is a low noise amplifier that drives the Uplink MPA and offers 38dB Gain.
ELECTRICAL SPECIFICATIONS: Frequency Range : See Table 1 Pass band Gain @ min attenuation : See Table 2 Variable Step Attenuator Range (2-dB steps) : 0-30 dB Pass band Ripple : ±1.5 dB typical Noise Figure @+25°C at max gain : 3.0 dB max. 20 dB Bandwidth Uplink Downlink : 32 MHz : 32 MHz 3rd Order Intercept point : See Table 2 Output Power @ 1dB Compression : See Table 2 Isolation between Up/Down Link : 80 dB min., 90 typical. Input/ Output Impedance : 50 Ohms VSWR (Input/Output) : 1.
Table 1 Frequency Band Downlink Frequency Ranges Uplink Frequency Ranges SMR CELL A CELL B CELL AB GSM F GSM H GSM L NPS PAC 2PG 2PGN PS8 PS9 851-866 MHz 869-880 MHz 880-894 MHz 869-894 MHz 935-960 MHz 947-960 MHz 935-947 MHz 866-869 MHz 929-942 MHz 929-942 MHz 851-869 MHz 935-941 MHz 806-821 MHz 824-835 MHz 835-849 MHz 824-849 MHz 890-915 MHz 902-915 MHz 890-902 MHZ 821-824 MHz 898-904 MHz 900-903 MHz 806-824 MHz 896-902 MHz Table 2 System .5/.5 Watt 70 dB Gain Pass band Gain (dB) Min.
MECHANICAL SPECIFICATIONS: Size : 8.75 x 6.20 x 3.0 inch : (222.3 x 157.5 x 76.2 mm) RF Connectors : N-type Female Weight : 2.0 Lbs. (4.4 kg.) approx. ENVIRONMENTAL CONDITIONS: The unit is designed for indoor applications: Operating temperature: - 20°C to + 50°C Storage temperature: - 50°C to + 90°C Mini-BDA CONNECTIONS The Mini-BDA is powered by a +15 VDC/1.67 Amp Wall Plug-In AC adapter with a 2.5 mm output connector.
Figure 3 22 24 26 2 14 12 16 18 8 6 8 10 22 24 26 2 0...30 dB Gain Adjustment DOWNLINK 8 30 0 2 4 6 8 10 0...30 dB Gain Adjustment UPLINK 20 4 14 12 20 30 0 2 16 18 Mini-BDA Mechanical Outline 2PGN IN BUILDING REPEATER (Heat Sink included with 2 Watt Models) Downlink Alarm Uplink Alarm Figure 3a (Relay Shown in Non-Alarm Condition) Conditions for Optional Alarm The alarm monitors current of both uplink and downlink amplifiers.
RF EXPOSURE WARNING In order to satisfy the FCC RF exposure requirements, the Mini-BDA/antenna installation must comply with the following: The outdoor antenna (Yagi type or similar directional antenna) must be installed so as to provide a minimum separation distance of 0.3 meters (30 cm) between the antenna and persons within the area. (This assumes a typical antenna with gain of [10.1 dBi, VSWR ≤ 1.5:1, Zo= 50 ohms, and a cable attenuation of between 1-10 dB).
Mini-BDA INSTALLATION DO NOT APPLY A.C. POWER TO THE Mini-BDA UNTIL CABLES ARE CONNECTED TO BOTH PORTS OF THE Mini-BDA AND THE ANTENNAS. 1. Mount the Mini-BDA on the wall with the RF connectors pointing DOWN. Using appropriate screws and anchors, attach the Mini-BDA to the wall at the four mounting holes on the side flanges. 2. Ensure that the isolation between the donor antenna and the service antenna is at least 12 dB greater than the Mini-BDA gain.
Mini-BDA OPERATION Refer to figure 3 and 4 for adjustment access location and label. Variable Step Attenuator Mini-BDA gain can be reduced by up to 30 dB in 2 dB steps using the variable step attenuator. Gain adjustment is made with rotary switches accessible from the top of the Mini-BDA enclosure (See Figure 4). Arrows on the shafts of these switches point to the value of attenuation selected.
Figure 4 26 6 4 2 0 30 2 28 4 14 16 18 20 0 14 16 18 12 30 12 10 22 24 26 2 28 2 20 6 8 10 Adjustment Access and Label Page 12
DIAGNOSTICS GUIDE The Mini-BDA provides long term, care-free operation and requires no periodic maintenance. There are no user-serviceable components inside the Mini-BDA. This section covers possible problems that may be related to the installation or operating environment. a. Gain Reduction Possible causes: Bad RF cables and RF connections to antennas, Damaged antennas. b. Excessive Intermodulation or Spurious Possible causes: Amplifier oscillation caused by insufficient isolation.
