G Way Solutions CELLABHW70 Bi-Directional Booster User Manual Manual

G-Way Microwave / G-Wave Bi-Directional Booster Manual

Manual

INSTALLATION AND OPERATING MANUAL FOR BDA-8XX-0.5/0.5W-XX-AX MINI-BI-Directional Amplifier
TABLE OF CONTENTS PARAGRAPH PAGE NO Mini-BDA OVERVIEW 3 Mini-BDA BLOCK DIAGRAM DESCRIPTION 3 Mini-BDA OPTIONS 3 Mini-BDA BLOCK DIAGRAM DRAWING (Figure 1) 4 ELECTRICAL SPECIFICATIONS 5 FREQUENCY RANGES (Table 1) 6 SYSTEM SPECIFICATIONS (Table 2) 6 MECHANICAL CONNECTIONS 7 ENVIRONMENTAL CONDITIONS 7 Mini-BDA CONNECTIONS 7 MECHANICAL OUTLINE DRAWING (Figure 3 & 3a) 8 RF EXPOSURE WARNING 9 Mini-BDA INSTALLATION 10 Mini-BDA OPERATION 11 MECHANICAL OUTLINE- ADJUSTMENT (Figure 4) 12 DIAGNOSTICS GUIDE 13 Page 2
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. Mini-BDA BLOCK DIAGRAM DESCRIPTION: Refer to Figure 1 for the following discussion. The Mini-BDA Downlink path receives RF signals from the base station and amplifies and transmits them to the subscriber. The Mini-BDA Uplink path receives RF signals from the subscriber and amplifies and transmits them to the base station. The Uplink and Downlink occupy two distinct frequency bands. For example, the SMR frequency bands are as follows: 806-821 MHz for the Uplink and 851-866 MHz for the Downlink. Two diplexers isolate the paths and route each signal to the proper amplifying channel. An Automatic Level Control (ALC) allows for output power limiting. A variable step attenuator gives 0 – 30 dB of attenuation in 2 dB steps. The use of these controls is covered in the “OPERATION” section, later in this document. Mini-BDA Options: An optional 9 pin D-sub connector is available for external alarm monitoring (See Figures 3 & 3a). Page 3
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. 6. Downlink Diplexer - has low pass band insertion loss and high selectivity. Page 4
ELECTRICAL SPECIFICATIONS: Frequency Range : See Table 1 Pass band Gain @ min attenuation : See Table 2 Variable Step Attenuator Range : 0-30 dB (2-dB steps) Pass band Ripple : ±1.5 dB typical Noise Figure @+25°C at max gain : 3.0 dB max. 20 dB Bandwidth Uplink : 32 MHzDownlink : 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) : 1.5: 1 max Power Supply (Local) : 15VDC/1.67 Amp Page 5
Table 1 Frequency Band Downlink Frequency Ranges Uplink Frequency Ranges SMR 851-866 MHz 806-821 MHz CELL A 869-880 MHz 824-835 MHz CELL B 880-894 MHz 835-849 MHz CELL AB 869-894 MHz 824-849 MHz GSM F 935-960 MHz 890-915 MHz GSM H 947-960 MHz 902-915 MHz GSM L 935-947 MHz 890-902 MHZ NPS PAC 866-869 MHz 821-824 MHz 2PG 929-942 MHz 898-904 MHz 2PGN 929-942 MHz 900-903 MHz PS8 851-869 MHz 806-824 MHz PS9 935-941 MHz 896-902 MHz Table 2 System Pass band Gain (dB) Min. 3rd Order Intercept Point (dBm) Typ. Output Power @ 1dB Compression (dBm) Typ. ALC Factory Set Point (dBm) Uplink Downlink Uplink Downlink Uplink Downlink Uplink Downlink The Manufacturer's rated output power of this equipment is for single carrier operation. For situations whenmultiple carrier signals are present, the rating would have to be reduced by 3.5 dB, especially where the outputsignal is re-radiated and can cause interference to adjacent band users. This power reduction is to be by means of input power or gain reduction and not by an attenuator at the output of the device. .5/.5 Watt 70 dB Gain 70 70 40 40 27 27 18 18 Page 6
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. The Wall Plug-In power adapter is highly reliable and compact, designed for use in telecommunications. The power adapter is CE and UL approved. The metal enclosure of the Mini-BDA is connected to ground. A 9-pin D-Sub connector provides failure alarm output contacts. The RF connections are made via two type “N” female connectors. The RF connector labeled “BASE” must be connected to the antenna pointing towards the base station. The RF connection labeled “MOBILE” must be connected to the antenna facing the area to be covered by the Mini-BDA. The RF connections must be made through cables with characteristic impedance of 50 ohms. The isolation between the base station antenna and the mobile antenna should be at least 12 dB higher than the Mini-BDA gain. Isolation less than this value can cause gain ripple across the band. Isolation equal to or less than the Mini-BDA gain will give rise to oscillations which will saturate the amplifiers and possibly cause damage to the Mini-BDA. Page 7
COM. N.C. 282041068023024222618141612282041068023024222618141612DOWNLINKGain Adjustment 0...30 dBUPLINKGain Adjustment 0...30 dBIN BUILDING REPEATER2PGNFigure 3 Mini-BDA Mechanical Outline (Heat Sink included with 2 Watt Models) Downlink Alarm Uplink Alarm Figure 3a (Relay Shown in Non-Alarm Condition) The alarm monitors current of both uplink and downlink amplifiers. An alarm condition N.O. will occur if either uplink or downlink amplifiers are under its current tolerance or if there is no DC power present. Page 8 Conditions for Optional Alarm
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). The indoor antenna (omni directional) must be installed so as to provide a minimum separation distance of 0.2 meters (20 cm) between the antenna and persons within the area. (This assumes a typical wide-beam type antenna with gain of 0-2 dBi, VSWR ≤ 2:1, Zo= 50 ohms, and a cable attenuation of between 1-10 dB). Page 9
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. (Use the higher of the Uplink and Downlink gains reported on the Mini-BDA test data sheet). 3. Connect the cable from the donor antenna to the Mini-BDA connector labeled “BASE” and the cable from the service antennas to the Mini-BDA connector labeled “MOBILE”.(Note: If used as a line amplifier, connect the external bias-tee between the service antenna cable and the Mini-BDA connector labeled “MOBILE”, with the RF+DC side of the bias-tee connected towards the service antenna cable.) 4. Connect the 2.5mm connector of the Wall Plug-In power adapter to the Mini-BDA and then to the AC power source. Turn the Power switch to the “ON” position and verify that the “System GO” lamp is illuminated. Installation of the Mini-BDA is now complete. To adjust the gain controls to suit the specific signal environment, refer to the next section of the manual. Note: For repeat installations of existing equipment, make sure the attenuation is positioned to its maximum setting (30 dB). After the attenuation is verified, follow the above steps starting with step 1. Page 10
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. The Mini-BDA gain can be determined by subtracting the attenuation value from the gain reported on the Mini-BDA Test Data Sheet for that side of the unit. The attenuators are labeled for Uplink and Downlink. ALC (Automatic Level Control) To minimize intermodulation products, each amplifier in the Mini-BDA contains an ALC feedback loop. The ALC circuit senses the output power and limits it to the factory preset level (See Table 2). A red indicator lamp is located on the front panel of the Mini-BDA and illuminates when the output power exceeds the ALC set point (See below). Downlink ALC Uplink ALC To establish proper operating gain on the Uplink and Downlink sides, start with the Uplink. Verify that the ALC switch is in the “ON” position. Observe the red indicator lamp on the Uplink amplifier. Units are shipping with maximum attenuation. Decrease attenuation one step at a time until the lamp is lit. Then, using the Uplink step attenuator, increase the attenuation until the lamp goes off. Repeat the process for the Downlink. The level indicator is accurate to +/- 0.4 dB of the ALC set point. Operation of BDA-8XX-0.5/0.5W-XX-AX at maximum gain with greater than -40 dBm average power incident on either BASE or MOBILE ports can cause damage to the Mini-BDA. Page 11
Figure 4 Adjustment Access and Label Page 12 030166421210141820222426280301664212101418202226288
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. The isolation between two antennas is given by the equation: Isolation = 92.5 + 20 Log (F x D) – Gt – Gr Where: F = frequency (GHz) D = separation (Km) Gt = transmit antenna gain (in the direction of the receive antenna). Gr = receive antenna gain (in the direction of the transmit antenna). For the SMR frequencies, the antenna isolation at 100 m separation is about 71 dB for omni-directional antennas (0 dB gain). To increase isolation, the antennas should have higher directivity and must be pointed away from each other. c. Occasional Drop-out of some Channels Possible causes: One channel with very strong power dominates the RF output of the amplifier. 38 Leuning Street South Hackensack, NJ 07606 Tel. 201-343-3140 Fax 201-343-6390 sales@gwaverf.com www.gwaverf.com Page 13

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