INSTALLATION AND OPERATING MANUAL FOR BDA-ESMR-2/2W-80-AN89R DUAL BAND BI-DIRECTIONAL AMPLIFIER
TABLE OF CONTENTS PARAGRAPH PAGE NO BDA OVERVIEW BDA BLOCK DIAGRAM DESCRIPTION BDA BLOCK DIAGRAM DRAWING (Figure 1) ELECTRICAL SPECIFICATIONS MECHANICAL SPECIFICATIONS ENVIRONMENTAL CONDITIONS BDA CONNECTIONS RF EXPOSURE WARNING MECHANICAL OUTLINE DRAWING (Figure 2) BDA INSTALLATION BDA OPERATION INSIDE LAYOUT AMPLIFIER LOCATION (Figure 4) CONTROL PANEL ATTENUATOR ADJUSTMENT (Figure 5) DIAGNOSTICS GUIDE Page 2 3 3 4 5 6 6 6 6 7 8 9 10 11 12
BDA OVERVIEW: The BDA assembly extends the coverage area of radio communications in buildings and RF shielded environments. The unit features low noise figure and wide dynamic range. It is a multi-block system, based on a dual-duplexed (quadruplexer) path configuration with sharp out of band attenuation allowing improved isolation between the receiving and transmitting paths, plus ESMR 800 and SMR 900 paths.
Figure 1 1. 4. 2. 5. 3. 6. BDA BLOCK DIAGRAM BDA-ESMR-2/2W-80-AN89R 1. Uplink SMR Quadruplexer - has low bandpass insertion loss and high selectivity. 2. Downlink Pre-amp - is a low noise amplifier that drives the Downlink MPA and offers 45dB Gain. 3. Downlink MPA – is a high power amplifier with an ALC circuit which offers 43dB Gain. 4. Uplink MPA – is a medium power amplifier with an ALC circuit which offers 43dB Gain. 5.
ELECTRICAL SPECIFICATIONS: Frequency Range SMR 800/900 Downlink : 851-869 (862-869 re-band) and 935-941 MHz Uplink : 806-824 (817-824 re-band) and 896-902 MHz Pass band Gain @ min attenuation : 80 dB min. Variable Step Attenuator Range (2-dB steps) : 0-30 dB Pass band Ripple : ±1.5 dB typical Noise Figure @+25°C at max gain : 4.0 typical (4.5 dB max.) 3rd Order Intercept point : +46 dBm typical Output Power @ 1dB Compression : +34 dBm typical Isolation between Up/Down Link : 80 dB min.
MECHANICAL SPECIFICATIONS: Size : 18.1 x 16.0 x 9.1 inch : (460 x 406 x 231 mm) approx. RF Connectors : N-type Female Weight : 48 Lbs. (21.7 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 BDA CONNECTIONS The BDA AC power is accepted through a standard 3-wire male plug (IEC-320) with phase, neutral and ground leads.
Figure 2 G-Wave ESMR 800/900 IN BUILDING REPEATER BDA Mechanical Outline Page 7
BDA INSTALLATION DO NOT APPLY A.C. POWER TO THE BDA UNTIL CABLES ARE CONNECTED TO BOTH PORTS OF THE BDA AND THE ANTENNAS. 1. Mount the BDA on the wall with the RF connectors pointing DOWN. Using appropriate screws and anchors, attach the 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 BDA gain. (Use the higher of the Uplink and Downlink gains reported on the BDA test data sheet).
BDA OPERATION Refer to figure 4 & 5 for adjustment access location and label. Variable Step Attenuator BDA gain can be reduced by up to 30 dB in 2 dB steps using the variable step attenuator (Figure 5). Gain adjustment is made with rotary switches accessible via the access door on the BDA enclosure. Arrows on the shafts of these switches point to the value of attenuation selected.
Figure 4 Inside Layout SMR 900 Uplink MPA ALC circuit inside SMR 800 Uplink MPA ALC circuit inside Control Panel (See Figure 5) Page 10
Figure 5 Control Panel Re-banding Switch: Is used to narrow the SMR 800 frequency band at the sites where re-banding occurs.
DIAGNOSTICS GUIDE The BDA provides long term, carefree 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. a. Gain Reduction Possible causes: Bad RF cables and RF connections to antennas, damaged antennae. b. Excessive Intermodulation or Spurious Possible causes: Amplifier oscillation caused by insufficient isolation.
