USERS MANUAL For 48710 and 48722 Bi-Directional Amplifiers 200 Pondview Drive, Meriden, CT 06450 877 737-9675, Fax 203 821-3852, www.rfsamericas.com Copyright 1993-Radio Frequency Systems-All rights reserved.
Disclaimer All information and statements contained herein are accurate to the best of the knowledge of Radio Frequency Systems, but Radio Frequency Systems does not make any warranty with respect thereto, including without limitation any results which may be obtained from the products described herein or the infringement by such products of any proprietary rights of any persons.
USER’S MANUAL SERIES 48750 RF REPEATER AMPLIFIERS TABLE OF CONTENTS General Statements---------------------------------------------------------------------------------- --------1 MPE Statement ----------------------------------------------------------------------------- 1 Field Alignment Statement --------------------------------------------------------------- 2 FCC and DOC Certification -------------------------------------------------------------- 2 Product Overview ------------------------------------
USER’S MANUAL SERIES 48750 RF REPEATER GENERAL STATEMENTS Thank you for selecting this RFS product. We are confident that you will find this product in proper working order, meeting all stated specifications. If not, please contact customer service immediately 800 321-4700 and we will resolve the situation without hesitation. Please take the time to read through this consise manual.
USER’S MANUAL SERIES 48710 RF REPEATER MAXIMUM PERMISSIBLE EXPOSURE LIMITS THIS PRODUCT IS CATAGORICALLY EXCLUDED FROM ROUTINE ENVIRONMENTAL EVALUATION ACCORDING TO CFR 47 SECTION 1.1307. Repeaters like the 48710 generate radio signals and thereby give rise to electromagnetic fields. The installer is expected to have a complete understanding of CFR Title 47 sections 1.1307 and 1.1310. A brief discussion follows but is not intended to be a substitute.
USER’S MANUAL 1.05 ERP / π R2 SERIES 48750 RF REPEATER Where R is the distance to center (any body part of person) Solving for 10,000 mW at 3 ft. (91.44 cm) we get a power density of .4 mW per cm2. The yagi antenna in this senario must be mounted in such a way that no body part of any person may come closer then 3 feet in the direction of the main power beam. This will limit exposure to well within th e M P E .
USER’S MANUAL SERIES 48710 RF REPEATER THEORY OF OPERATION The 48710 series signal boosters are designed to enhance radio communications in buildings, basements, tunnels and other RF shielded environments. The 48710 is tuned for the 800 MHz SMR band and the 48722 is tuned for the 900 MHz SMR band. These units work by receiving and amplifying the Base TX signals via a donor antenna directed at the desired base site. This RF path is called the ‘downlink”.
USER’S MANUAL Gain, no Attenuation, Gain Flatness, Typ. Manual Attenuator Range Output Limiter Range, automatic* Noise Figure, Typ.** Composite Power, Typ.* iDEN, CDMA Typ. SERIES 48750 RF REPEATER 80 dB ±1 .0 d B 15 dB 20 dB 2 .0 d B +30 dBm +27 dBm 80 dB ± 1 .0 d B 15 dB 20 dB 2 .0 d B +30 dBm +27 dBm Impedance, both ports 50 Ohms VSWR, input, both ports 1 .5 Propagation Delay, worst case at band edge < 3.0 microsecond Power , 120/220 Auto ranging, IEC-320 Socket 120 VAC @ 1.
USER’S MANUAL SERIES 48710 RF REPEATER The primary contributor to spurious emission is multiple signal intermodulation. As multiple signals are amplified, intermodulation products (IM) are generated. The level of the IM is a factor of the amplifiers linearity or 3rd Order Intercept Point (IP3) and the number and power of signals being amplified (Pout). IM = 3xPout - 2xIP3 Pout is the combined power of all the signals in the pass band known as the “composite power”.
USER’S MANUAL N um berof Signals 1 2 4 8 16 32 64 dBm 30.0 26.0 22.0 18.0 14.0 10.0 6.5 SERIES 48750 RF REPEATER mW 1000 398 160 63 25 10 5 In all cases the actual signal output power is equal to the input signal power plus the gain of the repeater. If a signal level of –80 dBm is at the input to the repeater and the gain is 80 dB, the resultant output will be 0 dBm, not +14 as in the above discussion. + 14 dBm in this case is the maximum.
USER’S MANUAL SERIES 48710 RF REPEATER Do not apply power until antennas have been connected to both the base and service area ports Choosing a location for the 48710 to reside is often dictated by circumstance. These units can withstand a wide range of environmental conditions but a cooler environment will increase the life of the product. The 48710 and 48722 are not intended for outdoor operation without protection. A outdoor version suffix “A” is designed for that purpose.
USER’S MANUAL SERIES 48750 RF REPEATER ANTENNA ISOLATION ISOLATION BETWEEEN THE DONOR (BASE) ANTENNA AND SERVICE AREA ANTENNA SHOULD BE 20 dB GREATER THAN THE GAIN OF THE REPEATER AMPLIFIER. If the isolation is less than the amplifier gain, then positive feedback sufficient for oscillation is present in the system. Such oscillations will overdrive one or both amplifier chains and continuously activate the AGC auto-shutdown circuitry.
USER’S MANUAL 1. 2. 3. 4. 5. 6. 7. 8. 9. 10 11 12 13 14 15 SERIES 48710 RF REPEATER RX LNA Alarm, logic, low = fault TX LNA Alarm, logic, low = fault –not used –not used RX PA Alarm, logic, low = fault TX PA Alarm, logic, low = fault Conditions 1 – 6. Remove and replace the faulty component or send the repeater back for repair. Temperature Alarm >+85° C, logic, low = fault Check for proper airflow past heat sink. If this fails, send unit in for repair. AGC Alarm, logic, low = fault Indicates overdrive.
USER’S MANUAL SERIES 48750 RF REPEATER provide the model number and serial number of the unit as well as a description of the symptoms of the problem. Send components or units freight-paid with the Return Authorization Number on the outside of the package to: Radio Frequency Systems 4100 S.W. Research Way Corvallis, Oregon 97333 LIMITED WARRANTY The Seller warrants that, at the time of shipment, the products manufactured by the Seller are free from defects in material and workmanship.