61-88-50 UserMan Page 1 of 29 Part No. 7-9375-4 Installation and Operation Manual for the Two-Way Signal Booster System Model Number 61-88-50 Copyright © 2004 TX RX Systems Inc.
61-88-50-UserMan Page 2 of 29 Warranty Symbols This warranty applies for one year from shipping date. Commonly Used TX RX Systems Inc. warrants its products to be free from defect 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 that shall have been defective at the time of manufacture. TX RX Systems Inc.
61-88-50-UserMan Page 3 of 29 NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
61-88-50-UserMan Page 4 of 29 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.
61-88-50-UserMan Page 5 of 29 Table of Contents General Description .............................................................................................. 1 Unpacking ....................................................................................................... 1 Installation ....................................................................................................... 1 Location ......................................................................................................
1-88-50-UserMan Page 6 of 29 Figures and Tables Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Cabinet mounting hole layout Front internal cabinet view AC power entry Measuring antenna isolation Boot-up display Operational status display Menu System Measuring Booster Gain Performance Survey Removing the Power Amplifier (1 of 3) Removing the Power Amplifier (2 of 3) Removing the Power Amplifier (3 of 3) Disconnecting Display/User In
61-88-50-UserMan Page 7 of 29 GENERAL DESCRIPTION Signal boosters extend radio coverage into areas where abrupt propagation losses prevent reliable communication. No frequency translation (conversion) occurs with this device. Signal Booster II (SB II) is available in a variety of configurations as shown in Table 1. The product model number is used to describe each configuration available. This manual details the installation and operation of the 61-88-50 series of boosters.
61-88-50-UserMan Page 8 of 29 Part Mumber Relative Gain Uplink/Dowlink (MHz) Guardband (MHz) Enclosure 61-88-50-A06-G1 High 896-902 / 935-941 33 NEMA 4 61-88-50-B06-G1 Mid 896-902 / 935-941 33 NEMA 4 61-88-50-C06-G1 Low 896-902 / 935-941 33 NEMA 4 61-88-50-A06-G2 High 896-902 / 935-941 33 NEMA 4X 61-88-50-B06-G2 Mid 896-902 / 935-941 33 NEMA 4X 61-88-50-C06-G2 Low 896-902 / 935-941 33 NEMA 4X Table 2: SB II 61-88-50- part family. TX RX Systems Inc.
61-88-50-UserMan Page 9 of 29 Although signal boosters can operate for years without being attended to, the unit will need to be accessed by service personnel with troubleshooting equipment, such as digital multimeters and spectrum analyzer or a laptop computer from time to time. The location of the power source will also have a bearing on the mounting location. SB II uses external heat sinks and needs to be mounted where there can be an unobstructed air flow over the heat sinks fins.
61-88-50-UserMan Page 10 of 29 61-88-50 Uplink L/L Card (for High Gain Model) Attenuator Card (for Mid Gain Model) Attenuator Card (for Low Gain Model) Comm-Card (Optional) Controller Downlink Power Distribution Uplink Power Distribution Downlink L/L Card (for High Gain Model) Attenuator Card (for Mid Gain Model) Attenuator Card (for Low Gain Model) Isolator Isolator Test Port Test Port Downlink M/L Card (for High Gain Model) Downlink M/L Card (for Mid Gain Model) Downlink Low Gain Card (for Low
61-88-50-UserMan Page 11 of 29 CONNECTIONS All cabling connections to the booster should be made and checked for correctness prior to powering up the system. The power system in SB II automatically switches to this backup DC input when the AC supply fails for any reason including a power outage or intentional disconnection. AC Line Signal Booster II is designed to be hard-wired to 110 single phase AC lines at 50 - 60 Hz (see Figures 2 and 3). A junction box is provided for this purpose.
61-88-50-UserMan Page 12 of 29 tion from each end, loosen the screw terminal, insert and retighten. Use #20 or #22 gauge insulated wire. Oscillation will reduce the effectiveness of the system and may possibly damage the power amplifier stages. Use of these terminals is optional. SB II also has a number of status LEDs built-in to individual modules to indicate a fault condition.
61-88-50-UserMan Page 13 of 29 EXTERNAL ANTENNA INTERNAL SIGNAL DISTRIBUTION SYSTEM SPECTRUM ANALYZER SIGNAL GENERATOR ISOLATION (dB) ZERO LOSS REFERENCE Figure 4: Typical test equipment interconnection for measuring antenna isolation. Increase Isolation or decrease gain? Modification of the signal distribution system is required to increase isolation between the up and downlink path. This will require significant changes that may or may not be practical from a cost or logistical standpoint.
61-88-50-UserMan Page 14 of 29 4) After the self check is complete, the four status lights should turn green and the light bars should be dark unless a signal is activating OLC action in either the uplink or downlink. WARNING UL PA: Green indicates that the uplink power amplifier is drawing current within the expected operating range and at a safe temperature. DL PA: Green indicates that the downlink power amplifier is drawing current within the expected operating range and at a safe temperature.
61-88-50-UserMan Page 15 of 29 NOTE: If no button is pressed within 2 minutes, system returns to Main Status Display Screen UL: DL: GAIN ## dB ## dB 61-89A-50 USER MENU 2 (8-20460B) OUT LVL ## dBm ## dBm KEY E Press ENTER key SBII Status OK Press Item Select arrow key E E Detailed Status E E Configuration Calibrate Currents Uplink Low Level Amp Set Gain Uplink Mid Level Amp E E Set Output Level E E NOTE: Pressing CANCEL always returns you to the previous menu without saving changes E E
