61-89A-50-A18-G1-UserMan page 1 of 20 Part No. 7-9352-4 Installation and Setup Manual for the Two-Way Signal Booster System Model Number 61-89A-50-A18-G1 Copyright (c) 2003 TX RX Systems, Inc. First Printing: December 2003 TX RX Systems Inc.
61-89A-50-A18-G1-UserMan page 2 of 20 Warranty This warranty applies for one year from shipping date. TX RX SYSTEMS INC. warrants its products to be free from defects in material and workmanship at the time of shipment. Our obligation under warranty is limited to replacement or repair at our option, of any such products (with the exception of tubes) which shall have been defective at the time of manufacture. TX RX SYSTEMS INC.
61-89A-50-A18-G1-UserMan page 3 of 20 For Class A Unintentional Radiators This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
61-89A-50-A18-G1-UserMan page 4 of 20 Antenna System Installation The antenna or signal distribution system consists of two branches. An uplink branch typically uses an outdoor mounted, unidirectional gain antenna such as a yagi and a downlink signal radiating system consisting of a network of zero-gain whip antennas or lengths of radiating cable usually mounted inside of the structure. Even though the antenna system may not be supplied or installed by TX RX Systems.
61-89A-50-A18-G1-UserMan page 5 of 20 Table of Contents Specifications General Description Note About Output Power Rating Installation Cautionary Note Pre-RF Connection Tests Test Equipment Antenna Isolation Procedure for Measuring Antenna Isolation Increasing Isolation Input Signal Levels Procedure for Measuring Input Signal Levels Reduction of Incoming Signal Strength Operation Main Status Display Screen Configuration Settings Calibrate Currents Set Gain Set Output Level Detailed Status Screens Amplifier
1-89A-50-A18-G1-UserMan page 6 of 20 Model 61-89A-50-A18-G1 Specifications Ele ctr ical Frequency Range: 806-869 MHz FCC Identif ication Number: EZZ5PI031202 Number of Passbands: 2 Passband Frequencies: 806-824 / 851-869 MHz Minimum Passband Separation: 45 MHz Pass Bandw idth: 18 MHz Gain: +80 dB Guardband: 27 MHz Output Level Control Range: 60 dB (less user programmed digital attenuation) System Noise Figure at Maximum Gain: 3.
61-89A-50-A18-G1-UserMan page 7 of 20 Uplink Low-Level Amplifier (remove for coarse gain adjustment) Uplink Power Distribution Downlink Low-Level Amplifier (remove for coarse gain adjustment) Downlink Power Distribution Controller Downlink Mid-Level Amplifier Uplink Mid-Level Amplifier Duplexer Duplexer Downlink Power Amplifier Uplink Power Amplifier Menu Select Buttons AC Power Switch Power Supply Battery Backup Switch Downlink In Uplink Out Alarm Contact Terminal Strip Uplink Out Downlink I
61-89A-50-A18-G1-UserMan page 8 of 20 highly efficient Class-C power amplifiers used in the output stages of most FM land mobile transmitters. Linear amplifiers are biased for a relatively high continuous DC current drain. Class-A amplifiers generally have the lowest efficiency of the various amplifier types, typically in the range of 25 33% and Class-AB amplifiers can reach 50% efficiency.
61-89A-50-A18-G1-UserMan page 9 of 20 antenna or signal source and the output distribution system does not exceed the signal boosters gain by at least 15 dB. This condition will reduce the effectiveness of the system and may possibly damage the power amplifier stages. 2) The major cause of damage to signal boosters is the application of input RF power levels in excess of the maximum safe input.
61-89A-50-A18-G1-UserMan page 10 of 20 pen at a high enough level to damage the power amplifier stages.
61-89A-50-A18-G1-UserMan page 11 of 20 S IG N A L D IS T R IB U T IO N S p e c tru m S Y S T E M A n a ly z e r R a d io 2 R a d io 1 Figure 3: Typical test equipment setup for measuring input signal levels. to provide extended coverage. In most cases, a signal booster with far less gain than the first is required. 4) Connect the analyzer to the section of the signal distribution system that is going to serve as the input (see Figure 3).
61-89A-50-A18-G1-UserMan page 12 of 20 NOTE If no button is pressed within 2 minutes, system returns to Main Status Display Screen U D KEY LOW MID PA ## MA ## MA ## MA ## MA ## MA ## MA E Press ENTER key Press Item Select arrow key Status OK NOTE Pressing CANCEL always returns you to the previous menu without saving changes E E Detailed Status E E Calibrate Currents Uplink Low Level Amp Set Gain Uplink Mid Level Amp E E Configuration Set Output Level E Restore Orig Config E E E Uplink
61-89A-50-A18-G1-UserMan page 13 of 20 so that we can add them together. The power in watts is written in scientific notation but the chart a) The addition of extra filtering. Consult TX RX System's sales engineers for help in this respect. b) Modification of the signal distribution layout by changing the type or location of pickup antennas. This has to be approached in an empirical way, that is, change-and-try until you get the desired results.
61-89A-50-A18-G1-UserMan page 14 of 20 Configuration Settings These items allow system configuration changes to be made. The final selection in this group “Restore Orig Config” will restore all configurable settings to their original factory default values. Each configurable item is discussed below in detail. CALIBRATE CURRENTS Selecting this function automatically calibrates the current alarm “trip” point of each amplifier in the system.
61-89A-50-A18-G1-UserMan page 15 of 20 Spectrum Analyzer Signal Generator Gain 10 dB Pad Test Port Test Port Zero Reference Figure 7: Test equipment interconnection for measuring signal booster gain. condition. Fault conditions occur when the current draw exceeds +/- 30% or the amplifiers operating temperature exceeds 80° Celsius. The power amplifiers do not have a warning state. The power supply LED indicators are located on display panel next to the menu selection buttons and are also dual color.
61-89A-50-A18-G1-UserMan page 16 of 20 2) The signal booster is equipped with a -30 dB signal sampler port following the final output amp (part of the Duplexer assembly). This port is for the connection of test equipment such as a spectrum analyzer and will allow the observation of the amplifier output at a considerably reduced output level. This decoupling figure needs to be added to a measured signal value in order to arrive at the actual signal level.
61-89A-50-A18-G1-UserMan page 17 of 20 4) For signals coming from a fixed antenna or station, record the level of all the desired incoming signals for future reference. MAINTENANCE AND REPAIR Signal boosters manufactured by TX RX Systems, Inc. can function reliably for 10 or more years with little or no maintenance. However, if the amplifiers are subjected to excessively high signal levels, power surges or lightning strikes, failures may occur.
61-89A-50-A18-G1-UserMan page 18 of 20 Power Conversion Chart dBm to dBw : Watts : Microvolts dBm dBw Watts Volts (50Ω) dBm dBw Watts Volts (50Ω) 80 50 100000 2236.07 40 10 10 22.36 79 49 79432.82 1992.9 39 9 7.94 19.93 78 48 63095.74 1776.17 38 8 6.31 17.76 77 47 50118.72 1583.01 37 7 5.01 15.83 76 46 39810.72 1410.86 36 6 3.98 14.11 75 45 31622.78 1257.43 35 5 3.16 12.57 74 44 25118.86 1120.69 34 4 2.51 11.21 73 43 19952.62 998.
61-89A-50-A18-G1-UserMan page 19 of 20 Power Conversion Chart dBm to dBw : Watts : Microvolts dBm dBw Watts uVolts (50Ω) dBm dBw Watts uVolts (50Ω) 0 -30 1.0000E-03 223606.8 -40 -70 1.0000E-07 2236.07 -1 -31 7.9433E-04 199289.77 -41 -71 7.9433E-08 1992.9 -2 -32 6.3096E-04 177617.19 -42 -72 6.3096E-08 1776.17 -3 -33 5.0119E-04 158301.49 -43 -73 5.0119E-08 1583.02 -4 -34 3.9811E-04 141086.35 -44 -74 3.9811E-08 1410.86 -5 -35 3.1623E-04 125743.
61-89A-50-A18-G1-UserMan page 20 of 20 Power Conversion Chart dBm to dBw : Watts : Microvolts dBm dBw Watts uVolts (50Ω) dBm -80 -110 1.0000E-11 22.36 -120 -81 -111 7.9433E-12 19.93 -121 -82 -112 6.3096E-12 17.76 -122 -83 -113 5.0119E-12 15.83 -84 -114 3.9811E-12 -85 -115 -86 -116 -87 dBw Watts uVolts (50Ω) -150 1.0000E-15 0.22 -151 7.9433E-16 0.2 -152 6.3096E-16 0.18 -123 -153 5.0119E-16 0.16 14.11 -124 -154 3.9811E-16 0.14 3.1623E-12 12.
