INSTALLATION AND OPERATING INSTRUCTIONS FOR MW-CBDA SERIES 10W-80-A COMPACT BI-DIRECTIONAL AMPLIFIERS Dekolink Wireless Ltd.;16 Bazel St.Qiryat-Arieh Petah-Tikva Israel, 49510 Tel- 972-3-9180-180; Fax-972-3-9180-190; Email-marketing@dekolink.com; rev 5 11/02 Web site- www.dekolink.
INSTALLATION & OPERATING INSTRUCTIONS CBDA 10W-80-A COMPACT BI-DIRECTIONAL AMPLIFIERS TABLE OF CONTENTS PARAGRAPH PAGE No BDA OVERVIEW 3 BLOCK DIAGRAM DESCRIPTION 3 STEP ATTENUATOR & RF GAIN & SETTING 4 AGC FUNCTION 5 AGC & GAIN CONTROLS 5 BDA INSTALLATION 6 BASE/DONOR ANTENNA INSTALLATION 6 REMOTE/MOBILE ANTENNA INSTALLATION 6 ANTENNA ISOLATION 6 INSTALLATION STEPS 7 DIAGNOSTICS GUIDE 8 ELECTRICAL SPECIFICATIONS 9 SYSTEM FREQUENCY RANGE 9 ENVIRONMENTAL CONDITIONS 10 MECHANICA
BDA OVERVIEW: The Compact Bi-Directional Amplifier (CBDA) assembly provides an exceptional repeater/booster performances to extend the coverage area of radio communications in buildings and RF shielded environments. Features such as high linearity power amplifiers are contributing for the overall improved system linearity performances. The unit is based on a duplexed path configuration, having sharp out of band attenuation for improved isolation between the receiving and transmitting paths.
TO BASE TO MOBILE Power Attenuator PA Monitor LNA Duplexer Downlink Power Monitor PA AGC AGC Duplexer Attenuator LNA Uplink BDA RF BLOCK DIAGRAM Step Attenuator & RF Gain Setting For proper operation of the BDA; the isolation between the base station antenna and the mobile antenna should exceed the BDA gain by at least 12 dB. If the BDA gain were higher than the isolation between the antennas, oscillation would start and would saturate the amplifier.
AGC FUNCTION The BDA has AGC function on both paths that serve to prevent the saturation of the power amplifier. Their amplifier has a directional coupler and a detector at the output of the high power amplifier to monitor the output power. When a high signal is received the automatic level control detects the amplitude and sends a feedback signal to a voltage variable attenuator which attenuates the signal level so that the output power of the amplifier does not exceed the preset limit.
BDA INSTALLATION Install the BDA Repeater in a shielded, ventilated and easy to reach area. Use low loss cables to connect antennas to the BDA. Install the BDA close to the service area to improve output power and noise figure. Mount the BDA with RF connecters pointing down. The RF connection is made via two type “N” female connectors. The RF connector labeled “Base” must be connected to the antenna; usually a Yagi; pointing to the base station.
INSTALLATION STEPS 1. Install all antennas and connect them to the BDA inputs. 2. Open the access windows at the sides of the BDA so that the variable attenuator is reached and the LED is visible. 3. Turn the AGC On. This AGC limits the output power of the BDA. The AGC on the Downlink path guarantees constant downlink power when and if the Donor power changes. 4. Set downlink gain to minimum; uplink gain to minimum (by increasing the attenuation). 5.
DIAGNOSTICS GUIDE The BDA provides long term, carefree operation and requires no periodic maintenance. This section covers possible problems related to the installation environment. RF Faults and RF Power Amplifiers LED Indications: The LEDs on the power amplifier are set to turn on when the transmitted power has reached or exceeded the specified composite power. Normally the LED at the downlink power amplifier should be on indicating good forward power transmission.
ELECTRICAL SPECIFICATIONS: Frequency Range (MHz) SEE TABLE Passband Gain @Min attenuation 80 dB nominal Passband Ripple ± 1.5 dB typical Manual Attenuation Range 0 to 30 dB in 2 dB step Noise Figure 6.0 dB max Impedance level 50 ohms V.S.W.R In/Out 1.5 : 1 max AGC Selection By ON/OFF Switch AGC Attenuation Range 25 dB typical AGC LED Indication LED turn ON when power reaches AGC Set Power Level. (both at On and Off positions). AGC Factory Power Preset Up link: +24 dBm nom.
ENVIRONMENTAL CONDITIONS: Operating temperature - 30°C to + 50°C Storage temperature - 50°C to + 90°C MECHANICAL SPECIFICATIONS: Size mm(Inch) RF Connectors Weight 265(10.4) x 250(9.8) x140(5.5) N-type Female 8 kg. Approx RF EXPOSURE WARNING In order to satisfy the FCC RF exposure requirements, you must ensure that the installation complies with the following: One antenna is connected via cable that has typical 1~10 dB attenuation (depends on the length of the cable) to the BDA BASE port.
MECHANICAL OUTLINE Dekolink Wireless Ltd.;16 Bazel St.Qiryat-Arieh Petah-Tikva Israel, 49510 Tel- 972-3-9180-180; Fax-972-3-9180-190; Email-marketing@dekolink.com; rev 5 11/02 Web site- www.dekolink.
DEKOLINK WIRELESS LIMITED WARRANTY Dekolink Wireless [Ltd.] (“Dekolink”), manufacturer of this product (the “Product”) warrants to the original purchaser (“Purchaser”) that the Product is free from defects in materials and workmanship for a term that ends on the earlier of twelve (12) months from the date of activation of the Product or fifteen (15) months from the date of shipment of the Product by Dekolink.
