Installation and Operating Manual BDA‐CELLAB/PCSF‐33/33‐80‐AB Dual Band Bi‐Directional Amplifier
TABLE OF CONTENTS PARAGRAPH PAGE NO OVERVIEW 3 BLOCK DIAGRAM DESCRIPTION 3 BLOCK DIAGRAM DRAWING (Figure 1) 4 ELECTRICAL SPECIFICATIONS 5 MECHANICAL SPECIFICATIONS 7 ENVIRONMENTAL CONDITIONS 7 FCC and IC NOTES 7 RF EXPOSURE WARNING 7 CONNECTIONS 8 OPTIONAL FEATURES 8 MECHANICAL OUTLINE DRAWING (Figure 2) 10 INSTALLATION 11 OPERATION 12 FRONT PANEL (Figure 3) 13 BACK PANEL (Figure 4) 13 DIAGNOSTICS GUIDE 14 Page | 2
OVERVIEW: The BDA-CELLAB/PCSF-33/33-80-AB assembly enhances the coverage area of radio communications in buildings and RF shielded environments. The BDA-CELLAB/PCSF-33/33-80-AB has dual RF paths (Forward / Reverse) to improve coverage in two distinct frequency bands. The unit features low noise figure and wide dynamic range. It is based on a dual duplexed path configuration with sharp out of band attenuation allowing improved isolation between the receiving and transmitting paths.
BLOCK DIAGRAM DRAWING: (Figure 1) 1. Input Base Quadruplexer – Features low insertion loss and separates UL from DL paths for CELL and PCS bands. 2. Downlink CELL LNA/Pre-Amp – Low noise figure amplifier with high linearity 3. Selector Filter CELL DL – Features high selectivity and provides required isolation at maximum gain. 4. Linear Power Amplifier CELL DL – includes ALC circuitry and up to 50 dB Gain. 5.
ELECTRICAL SPECIFICATIONS: Frequency Range : UL CELL AB 824-849 MHz : UL PCS 1850-1910 MHz : DL CELL AB 869-894 MHz : DL PCS 1930-1990 MHz Pass band Gain @ min attenuation : 80 dB (Min.) Variable Step Attenuator Range (2-dB steps) : 0-30 dB Gain Flatness : ±1.5 dB (Typ.) Noise Figure @+25 C at max gain : 5.0 dB (Typ.) Composite Output Power Downlink : +33 dBm (Typ.) Uplink : +33 dBm (Typ.) Maximum Input Signal Level :+10 dBm Input/ Output Impedance : 50 Ohms VSWR (Input/Output) : <1.
By additional filtering this BDA can support the following bands: Table 1 Frequency Band CELL AB CELL A CELL B PCS FULL PCS A PCS B PCS C PCS C-1 PCS C-2 PCS C-3 PCS C-4 PCS C-5 PCS D PCS E PCS F Downlink Frequency Ranges 869-894 MHz 869-880 MHz 880-894 MHz 1930-1990 MHz 1930-1945 MHz 1950-1965 MHz 1975-1990 MHz 1982.5-1990 MHz 1975-1982.
MECHANICAL SPECIFICATIONS: Size : 18.1x 13.2 x 16 inch RF Connectors : N-Type Female Weight : 65 Lb. (28.5 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 FCC NOTE: The product has been tested and found to comply with the Federal Communications Commission (FCC) RF Exposure Requirements, pursuant to FCC Part 22 and 24.
CONNECTIONS: The BDA AC power is accepted through a standard 3-wire male plug (IEC-320) with phase, neutral and ground leads. The AC power is wired to a high efficiency DC switching power supply which is CE and UL approved. The power supply runs the amplifiers and the LED indicators. The metal enclosure of the BDA is connected to ground. A 9-pin circular connector provides failure and Oscillation Detect alarms output dry contacts, Normally Open and Normally Closed (see diagrams on page 8).
OPTIONAL ALARM CONDITIONS: The alarm monitors current of both uplink and downlink amplifiers. An alarm condition will occur if either uplink or downlink amplifiers are over or under its current tolerance. Also Oscillation detect Alarm would be provided on the other pair dry contacts. (Relay Shown in Non-Alarm Condition) Option for Battery Backup An optional connector to connect an external +28 VDC for BDA back-up .
Mechanical Outline (Figure 2): Page | 10
INSTALLATION: DO NOT APPLY A.C. POWER TO THE RHBDA UNTIL CABLES ARE CONNECTED TO BOTH PORTS OF THE RHBDA AND THE ANTENNAS. 1. Set the BDA Rack on the floor or mount on a wall (where applicable). Using appropriate screws and anchors, attach the BDA to the wall at the four mounting holes on the side flanges. (Special version not shown in this manual). 2. Ensure that the isolation between the donor antenna and the service antenna is at least 12 dB greater than the BDA gain.
OPERATION: Refer to Figure 3 & 4 for adjustment access location, connectors and labels. Variable Step Attenuator 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 located on the front panel of the BDA enclosure. Arrows on the shafts of these switches point to the value of attenuation selected.
Variable Gain Adjustment and LED Indicators Figure 3 Figure 4 Back Panel Connections Page | 13
DIAGNOSTICS GUIDE The BDA provides long term, care-free operation and requires no periodic maintenance. There are no user-serviceable components inside the BDA. This section covers possible problems that may be related to the installation or operating environment. Gain Reduction Possible causes: Defective RF cables and RF connections to antennas, damaged antenna or Leaky cable. Excessive Intermodulation or Spurious Possible causes: Amplifier oscillation caused by insufficient isolation.
