INSTALLATION AND OPERATING MANUAL FOR BDA-1XXX-.X/.
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. Up-Link Diplexer - has low pass band insertion loss and high selectivity 2. Down-Link Pre-amp - is a low noise amplifier that drives the Down-Link MPA and offers 38dB Gain 3. Down-Link MPA – is a medium power amplifier with an ALC circuit which offers 40dB Gain. (High power amplifier with an ALC circuit which offers 40dB Gain for 1 & 2 Watt models) 4. Up-Link MPA – is a medium power amplifier with an ALC circuit which offers 40dB Gain 5.
ELECTRICAL SPECIFICATIONS: Frequency Range : See Table 1 Pass band Gain @ min attenuation : See Table 2 Nominal Channel Bandwidth : 25.3 MHz typical 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. 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 PCS A PCS B PCS C PCS D PCS E PCS F 1930-1945 MHz 1950-1965 MHz 1975-1990 MHz 1945-1950 MHz 1965-1970 MHz 1970-1975 MHz 1850-1865 MHz 1870-1885 MHz 1895-1910 MHz 1865-1870 MHz 1885-1890 MHz 1890-1895 MHz Table 2 System .1/.1 Watt 70 dB Gain .1/.5 Watt 70 dB Gain .5/.5 Watt 70 dB Gain .5 / 1 Watt 70 dB Gain .5 / 2 Watt 70 dB Gain .1/.1 Watt 60 dB Gain .1/.5 Watt 60 dB Gain .5/.5 Watt 60 dB Gain .5 / 1 Watt 60 dB Gain .
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 (+24 VDC/1.88 Amp Desk Top AC adapter for 1 Watt models and (+24 VDC/3.
Figure 3 24 26 28 6 8 10 22 24 26 2 8 20 0...30 dB Gain Adjustment DOWNLINK 14 12 30 0 2 4 6 8 10 0...30 dB Gain Adjustment UPLINK 16 18 12 22 20 30 0 2 4 14 16 18 Mini-BDA Mechanical Outline 2PGN IN BUILDING REPEATER (Heat Sink included with 1 & 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.
