Installation and Operating Instructions for MW-CBDA-SMR-800-900-1W80 Dual Band Compact Bi-Directional Amplifier Dekolink Wireless Proprietary ConfidentialPetah-Tikva Information.Israel, Copying, Distribution, and Disclosure are Dekolink Wireless Ltd.;16 Bazel and St.Qiryat-Arieh 49510 without 9180 Express from Dekolink Wireless Company. ; Tel- 972-3-918prohibited 0-180; Fax-972-3-190Authorization ; Email-marketing@dekolink.com by all applicable copyright laws. page 1 of 16 Web site- www.dekolink.
Table of Contents Paragraph Page No CBDA Overview 3 Main Characteristics 3 Top Cover Alarm Indications 3 Remote Alarm Connector (back panel) 4 CBDA Indications and Control ( side windows) 4 Block Diagram Description 4 RF Block Diagram 5 Step Attenuator and RF Gain Setting 5 AGC Function 6 AGC & Gain Controls 6 AGC Amplifier Layout 6 CBDA Monitor and Alarm 7 CBDA Monitor and Alarm Function Block Diagram 8 CBDA Installation 9 Base / Donor Antenna Installation 9 Remote / Service
CBDA Overview The Compact Bi-Directional Amplifier (CBDA) assembly provides exceptional repeater/booster performances to extend the coverage area of radio communications in buildings and RF shielded environments. Main Characteristics • Covers both SMR 800 and SMR 900 in one product. • 80 dB RF gain • Over 24 dBm (1/4 Watt) downlink composite power.
Remote Alarm Connector (back panel) Dry contact relay arms are connected to this D9 connector. The relay arms switch over at either one of the two alarms indicated on the top cover. CBDA Indications and Control (side windows) These are reached by opening the window on the sides of the CBDA AGC LED: This red led illuminates when the transmitted power is equal or higher than the composite power (factory preset at +24 dBm and DL). AGC ON/OFF switch: Turns on the automatic power control.
To S ervice A rea To B ase A ttenuator 935 to 941 M H z P ow er M onitor TX TX LN A 851 to 866 M H z P ow er M onitor PA 896 to 902 M H z A ttenuator RX RX LN A AGC Q uad Filter A ssy 935 to 941 M H z 851 to 866 M H z AGC D ow nlink 896 to 902 M H z 806 to 821 M H z PA U plink 806 to 821 M H z Q uad Filter A ssy RF Block Diagram Step Attenuator & RF Gain Setting For proper operation of the CBDA; the isolation between the base station antenna and the mobile antenna should exceed th
AGC Function The CBDA 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 monitoring 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.
CBDA Monitor and Alarm The two main active elements are the Downlink Power Amplifier and the Uplink power amplifier. Each CBDA has a monitor circuit to monitor these elements and give alarm signal when there is a deviation from normal operation. The summarized alarm output of the monitor card is sent to a D-type connector on the front panel. The monitor circuit performs the following functions: • Monitors the current of uplink power amplifier.
CBDA Monitor and Alarm Function Block Diagram Green LED +28 V Power On Indication Red LED 8 Pin Connector UL Power Amplifier Current Alarm +28 V Current Sensor DL RF Power Detection (from DL Power Amplifier) To UL Power Amplifier DC Supply Red LED Power Sensor DL Low RF Power Alarm Sum of all Alarms To pin 2 of D9 Alarm connector Summary Alarm To pin 3 of D9 Alarm connector To pin 4 of D9 Alarm connector (Shown at Fault Position) Alarm relay connection to D connector: Pin 2 to 4 open at any f
CBDA Installation Install the CBDA Repeater in a shielded, ventilated and easy to reach area. Use low loss cables to connect antennas to the CBDA. Install the CBDA close to the service area to improve output power and noise figure. Mount the CBDA 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 CBDA inputs. 2. Open the access windows at the sides of the CBDA so that the variable attenuator is reached and the LED is visible. Turn the AGC On. This AGC limits the output power of the CBDA. The AGC on the Downlink path guarantees constant downlink power when and if the Donor power changes. Warning: The AGC switch must be always ON in order to limit the spurious signals. 3.
Diagnostic Guide The CBDA provides long term, carefree operation and requires no periodic maintenance. This section covers possible problems related to the installation environment. Top Cover LED Indications Once the CBDA is installed the red LEDs on the top cover indicate uplink and downlink faults. The green LED is AC power on indication. Indication Downlink LED (on cover) is ON Cause Indicates low RF power at downlink path <15 dBm) Action Check base antenna connection. Check antenna alignment to base.
RF Faults and RF Power Amplifiers LED Indications The LED on each power amplifiers is 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. The LED on the uplink power amplifier turns on only when a near by mobile is transmitting.
Electrical Specifications Downlink frequency range 851- 869 MHz 935 - 941 MHz Uplink frequency range 806 - 824 MHz 896 - 902 MHz Pass band gain @min attenuation 80 dB nominal Pass band ripple ± 2 dB typical Manual attenuation range 0 to 30 dB in 2 dB step Noise figure @max gain 6.0 dB max 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).
Environmental Conditions Operating temperature 0°C to + 50°C Storage temperature - 50°C to + 90°C Mechanical Specifications Size mm(Inch) RF Connectors Weight 330(13) x 300(11.8) x190(7.5) N-type Female 14 kg. (31 lb.) 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 CBDA BASE port.
Install this way up with RF connectors facing down 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; 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.
