G.703—120 High Speed Adapters
Contents
1. FEBRUARY 1999 MT260A F MT260A M MT261A F MT261A M BLACK BOX G 703 120 High Speed Adapters CUSTOMER SUPPORT INFORMATION Order toll free in the U S Call 877 877 BBOX outside U S call 724 746 5500 FREE technical support 24 hours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 Mailing address Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site www blackbox com E mail info blackbox com 6 703 120 HIGH SPEED ADAPTERS FEDERAL COMMUNICATIONS COMMISSION AND INDUSTRY CANADA RADIO FREQUENCY INTERFERENCE STATEMENTS This equipment generates uses and can radiate radio frequency energy and if not installed and used properly that is in strict accordance with the manufacturer s instructions may cause interference to radio communication It has been tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart J of Part 15 of FCC rules which are designed to provide reasonable protection against such interference when the equipment is operated in a commercial environment Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever measures may be necessary to correct the interference Changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate2. 15 En caso de existir una antena externa deber ser localizada lejos de las lineas de energia 16 El cable de corriente deber ser desconectado del cuando el equipo no sea usado por un largo periodo de tiempo 17 Cuidado debe ser tomado de tal manera que objectos liquidos no sean derramados sobre la cubierta u orificios de ventilaci n 18 Servicio por personal calificado deber ser provisto cuando A cable de poder o el contacto ha sido da ado B Objectos han ca do o l quido ha sido derramado dentro del aparato El aparato ha sido expuesto a la lluvia o D aparato parece no operar normalmente o muestra un cambio en su desempe o E aparato ha sido tirado o su cubierta ha sido da ada DF 6 703 120 HIGH SPEED ADAPTERS TRADEMARKS USED IN THIS MANUAL Any trademarks mentioned in this manual are acknowledged to be the property of the trademark owners 6 703 120 HIGH SPEED ADAPTERS CONTENTS Mos e s cede aoa EE 6 2 Mod ese dena tara raster de 7 P I Desenpuolie 7 oio os dab essate wan 8 e sco s woe dots 9 T sa acuden s i apa Ee dad ds 11 Appendix Insertion Loss and Return Loss Measurement Charts 12 6 703 120 HIGH SPEED ADAPTERS 1 Specifications Transmission Medium 75 ohm coax to 120 ohm shielded twisted pair STP Transmission Rate MT260A 8 Mbps
3. MT261A 34 Mbps Connectors MT260A F 2 BNC coax female 1 RJ 45 female MT260A M 2 BNC coax male 1 RJ 45 female MT261A F 2 BNC coax female 1 RJ 45 female MT261A M 2 BNC coax male 1 RJ 45 female Power None required Size 0 8 H x 1 7 W x 2 7 D 2 x 4 5 x 6 9 cm Weight 0 1 Ib 0 06 kg 2 Introduction 2 1 Description The G 703 120 High Speed Adapter allows 75 ohm coax hardware to communicate with twisted pair equipment up to 120 ohms Supporting G 703 data rates to 8 Mbps the MT260A converts 75 ohm coax signals to 100 ohm twisted pair and vice versa The MT261A operates at speeds up to 34 Mbps and bi directionally converts 75 ohm coax to 120 ohm twisted pair The following models are available e G 703 120 High Speed Adapter 8 Mbps female part number MT260A F e G 703 120 High Speed Adapter 8 Mbps male part number MT260A M e G 703 120 High Speed Adapter 34 Mbps female part number MT261A F e G 703 120 High Speed Adapter 34 Mbps female part number MT261A M 20 1 1 6 703 120 HIGH SPEED ADAPTERS 2 2 Features e Solves mismatches between coax and twisted pair G 703 terminations e Speeds up to 8 or 34 Mbps depending on model e Choose from male or female coax connectors to fit your system no gender adapters needed e MT261A models convert signals bidirectionally 6 703 120 HIGH SPEED ADAPTERS 3 Configuration The Adapters are pre set to wo
4. 0 19 94 25 19 12 30 18 95 34 368 18 23 40 17 43 45 16 74 50 16 45 51 55 16 39 lt BLACK BOX O Copyright 1999 Black Box Corporation All rights reserved 1000 Park Drive e Lawrence PA 15055 1018 e 724 746 5500 e Fax 724 746 0746
5. er montado a la pared o al techo s lo como sea recomendado por el fabricante 8 Servicio El usuario no debe intentar dar servicio al equipo el ctrico m s all a lo descrito en las instrucciones de operaci n Todo otro servicio deber ser referido a personal de servicio calificado 9 El aparato el ctrico debe ser situado de tal manera que su posici n no interfiera su uso La colocaci n del aparato el ctrico sobre una cama sof alfombra o superficie similar puede bloquea la ventilaci n no se debe colocar en libreros o gabinetes que impidan el flujo de aire por los orificios de ventilaci n 6 703 120 HIGH SPEED ADAPTERS 10 El equipo el ctrico deber ser situado fuera del alcance de fuentes de calor como radiadores registros de calor estufas u otros aparatos incluyendo amplificadores que producen calor 11 El aparato el ctrico deber ser connectado a una fuente de poder s lo del tipo descrito en el instructivo de operaci n como se indique en el aparato 12 Precauci n debe ser tomada de tal manera que la tierra fisica y la polarizaci n del equipo no sea eliminada 13 Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos colocados sobre o contra ellos poniendo particular atenci n a los contactos y recept culos donde salen del aparato 14 El equipo el ctrico debe ser limpiado nicamente de acuerdo a las recomendaciones del fabricante
6. ments of the 100 to 120 ohm RJ 45 connectors are shown in Table 4 1 Table 4 1 Pin Assignments of the RJ 45 Connector RJ 45 Pin s Function 1 amp 2 TX Pair 3 TX Shield 485 RX Pair 6 RX Shield 6 703 120 HIGH SPEED ADAPTERS Appendix Insertion and Return Loss Measurements Table A 1 Insertion Loss for the MT260A F MHz Actual loss each unit dB 0 2 0 665 0 211 0 6575 0 3 0 65 0 4 0 64 0 422 0 64 0 5 0 63 0 6 0 6225 0 7 0 61 0 8 0 6 0 9 0 5875 1 0 5825 2 0 53 3 0 5625 4 0 645 5 0 5575 6 0 53 7 0 5325 8 0 54 8 448 0 55 9 0 57 10 0 565 11 0 57 12 0 575 12 672 0 5575 13 0 575 6 703 120 HIGH SPEED ADAPTERS Table A 2 Return Loss for the MT260A F MHz Return Loss dB 0 2 24 79 0 211 25 29 0 3 27 39 0 4 27 85 0 422 28 77 0 5 29 42 0 6 29 95 0 7 29 7 0 8 30 78 0 9 30 78 1 30 98 2 31 43 3 31 6 4 31 03 5 29 49 6 28 56 7 27 47 8 26 56 8 448 25 65 9 25 3 10 24 76 11 24 02 12 23 38 12 672 22 54 13 21 97 6 703 120 HIGH SPEED ADAPTERS Table A 3 Insertion Loss for the MT261A F MHz Actual loss each unit dB 0 86 0 225 1 0 215 1 72 0 1925 2 0 1975 4 0 195 6 0 21 8 0 225 10 0 2425 15 0 275 20 0 2925 25 0 3225 30 0 59 34 368 0 345 40 0 3525 45 0 37 50 0 38 51 55 0 385 6 703 120 HIGH SPEED ADAPTERS Table A 4 Return Loss for the MT261A F MHz Return Loss dB 0 86 23 53 1 23 27 1 72 23 08 2 22 85 4 21 48 6 22 22 8 21 79 10 21 41 15 20 69 2
7. rk in most applications without additional configuration The only parameter that you can configure is the shield connection between 75 ohm coax and twisted pair interfaces The shield is connected between the modular jack and the dual BNC connectors Removing the jumper breaks the connection Table 3 1 Jumpers Coax BNC 75 Ohm Jumper RJ 45 100 to 120 Ohm TX Shield JP1 RJ 45 Shield RJ 45 Pin 3 TX Shield JP2 RJ 45 Shield RJ 45 Pin 6 The factory setting leaves both jumpers JP1 and JP2 in place thus passing both shield connections through To break one or both of the shield connections follow these instructions 1 Insert a small flat blade screwdriver into the slot on the side of the Adapter case and twist The case will pop open exposing the PC board 2 Holding the PC board with the modular jack facing left locate jumper JP1 toward the top of the board and JP2 toward the bottom of the board MEM 6 703 120 HIGH SPEED ADAPTERS Remove the desired jumper s from the three pins on the right for JP1 and from the three pins on the left for JP2 to break one or both shield connections 3 Re align the case halves and end inserts and snap the case halves back together 4 Installation The Adapter is easy to install and requires no AC power or batteries for operation After making any necessary configuration changes see Chapter 3 simply plug in the modular and coax cables as indicated on the case The pin assign
8. the equipment This digital apparatus does not exceed the Class A limits for radio noise emission from digital apparatus set out in the Radio Interference Regulation of Industry Canada Le pr sent appareil num rique n met pas de bruits radio lectriques d passant les limites applicables aux appareils num riques de classe A prescrites dans le R glement sur le brouillage radio lectrique publi par Industrie Canada The CE symbol on your High Speed Adapters indicates that they comply with the Electromagnetic Compatibility EMC directive and the Low Voltage Directive LVD of the Union European EU A 6 703 120 HIGH SPEED ADAPTERS NORMAS OFICIALES MEXICANAS NOM ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD 1 Todas las instrucciones de seguridad y operaci n deber n ser le das antes de que el aparato el ctrico sea operado 2 Las instrucciones de seguridad y operaci n deber n ser guardadas para referencia futura 3 Todas las advertencias en el aparato el ctrico y en sus instrucciones de operaci n deben ser respetadas 4 Todas las instrucciones de operaci n y uso deben ser seguidas 5 El aparato el ctrico no deber ser usado cerca del agua por ejemplo cerca de la tina de ba o lavabo s tano mojado o cerca de una alberca etc 6 El aparato el ctrico debe ser usado nicamente con carritos o pedestales que sean recomendados por el fabricante 7 El aparato el ctrico debe s
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