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Black Box G.703-120 Manual De Instrucciones
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Black Box G.703-120 Manual De Instrucciones

Black Box G.703-120 Manual De Instrucciones

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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
G.703—120
FEBRUARY 1999
MT260A-F
MT260A-M
MT261A-F
MT261A-M

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Resumen de contenidos para Black Box G.703-120

  • Página 1 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...

  • Página 2: Federal Communications Commission

    G.703—120 HIGH SPEED ADAPTERS FEDERAL COMMUNICATIONS COMMISSION 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...

  • Página 3: Instrucciones De Seguridad

    G.703—120 HIGH SPEED ADAPTERS NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD 1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado. 2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura.
  • Página 4 G.703—120 HIGH SPEED ADAPTERS 10. El equipo eléctrico 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 eléctrico deberá ser connectado a una fuente de poder sólo del tipo descrito en el instructivo de operación, o como se indique en el aparato.
  • Página 5 G.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.

  • Página 6: Tabla De Contenido

    G.703—120 HIGH SPEED ADAPTERS CONTENTS 1. Specifications ......6 2. Introduction......7 2.1 Description.

  • Página 7: Specifications

    G.703—120 HIGH SPEED ADAPTERS 1. Specifications Transmission Medium—75-ohm coax to 120-ohm shielded twisted pair (STP) Transmission Rate—MT260A: 8 Mbps; 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;...

  • Página 8: Introduction

    G.703—120 HIGH SPEED ADAPTERS 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.

  • Página 9: Features

    G.703—120 HIGH SPEED ADAPTERS 2.2 Features • Solves mismatches between coax and twisted-pair G.703 terminations • Speeds up to 8 or 34 Mbps, depending on model • Choose from male or female coax connectors to fit your system—no gender adapters needed •...

  • Página 10: Configuration

    G.703—120 HIGH SPEED ADAPTERS 3. Configuration The Adapters are pre-set to work 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.
  • Página 11 G.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.

  • Página 12: Installation

    G.703—120 HIGH SPEED ADAPTERS 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 assignments of the 100- to 120-ohm RJ-45 connectors are shown in Table 4-1.
  • Página 13 G.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) 0.665 0.211 0.6575 0.65 0.64 0.422 0.64 0.63 0.6225 0.61 0.5875 0.5825 0.53 0.5625 0.645 0.5575 0.53 0.5325 0.54...
  • Página 14 G.703—120 HIGH SPEED ADAPTERS Table A-2. Return Loss for the MT260A. F (MHz) Return Loss (dB) 24.79 0.211 25.29 27.39 27.85 0.422 28.77 29.42 29.95 29.7 30.78 30.78 30.98 31.43 31.6 31.03 29.49 28.56 27.47 26.56 8.448 25.65 25.3 24.76 24.02 23.38 12.672...
  • Página 15 G.703—120 HIGH SPEED ADAPTERS Table A-3. Insertion Loss for the MT261A. F (MHz) Actual loss each unit (dB) 0.86 0.225 0.215 1.72 0.1925 0.1975 0.195 0.21 0.225 0.2425 0.275 0.2925 0.3225 0.59 34.368 0.345 0.3525 0.37 0.38 51.55 0.385...
  • Página 16 G.703—120 HIGH SPEED ADAPTERS Table A-4. Return Loss for the MT261A. F (MHz) Return Loss (dB) 0.86 23.53 23.27 1.72 23.08 22.85 21.48 22.22 21.79 21.41 20.69 19.94 19.12 18.95 34.368 18.23 17.43 16.74 16.45 51.55 16.39...
  • Página 17 © Copyright 1999. Black Box Corporation. All rights reserved. 1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746...