American Fibertek MRX-8689C-SL User Manual

© Copyright 2005, American Fibertek, Inc. 1216JD

Six Channel Video Multiplexer

Instruction Manual

MTX-8689C-SL

MRX-8689C-SL

with Bi-directional Data

Table of Contents

Functional Description ........................................................................3

Installation...........................................................................................3

Power Source .....................................................................................4

Power Connection...............................................................................4

Input / Output Connections .................................................................4

Typical System Data Connections......................................................5

Data Configuration Switches...............................................................6

MTX-8689C-SL Status LED Indicators ...............................................8

MRX-8689C-SL Status LED Indicators...............................................9

Data Termination Requirements.......................................................10

Offset Bias - RS485 Data Signals.....................................................11

Warranty / Service Information .........................................................12

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INSTALLATION AND OPERATION INSTRUCTIONS

INTRODUCTION

Thank you for purchasing your American Fibertek 8689C-SL Series singlemode six channel
video multiplexer with bi-directional data. Please take a few minutes to read these installation
instructions in order to obtain the maximum performance from this product.

FUNCTIONAL DESCRIPTION

The 8689C-SL Series units operate as a transmitter / receiver pair for the transmission of six
simultaneous, real time baseband NTSC/PAL video signals with field configurable bi-directional
data over one singlemode fiber optic cable.

This link can accommodate either a single RS485 interface (2 or 4 wire) or both an RS422
interface and a contact closure interface. When used in RS422 /Contact Closure mode, each
interface functions independent of the other. These units are factory shipped configured in

the RS422 / Contact Closure configuration.

The MTX-8689C-SL transmitter accepts up to six video inputs and multiplexes these signals
along with the data signals onto a single optical output port for connection to the fiber
transmission system. Correspondingly, the MRX-8689C-SL receiver converts the optical signal
to six independent video output signals along with the data signals.

The 8689C-SL Series units operate on a 9 um singlemode fiber. Refer to the data sheets for
detailed performance specifications.

The individual units may be configured for rack mounting or wall mounting depending upon the
position of the included mounting hardware.

INSTALLATION

THIS INSTALLATION SHOULD BE MADE BY A QUALIFIED SERVICE PERSON AND
SHOULD CONFORM TO THE NATIONAL ELECTRICAL CODE, ANSI/NFPA 70 AND LOCAL
CODES.

To install the MTX-8689C-SL or MRX-8689C-SL it is first necessary to mount the rack flanges to
the unit.

For rack mounting the ears are installed on the
sides of the unit with the surfaces that have
oval holes flush with the front of the unit as in
Figure 1. Mount the ears with the #10 flathead
screws provided. To mount in the rack cabinet,
use mounting screws that are appropriate for
the rack cabinet being used.

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For mounting the unit flush to a wall or other rigid
surface, the ears may be installed on the sides with
the oval holes flush with the bottom of the unit as in
Figure 2. Mount the ears with the #10 flathead
screws provided. Mount the unit to a rigid surface
using #10 (5mm) screws.

POWER SOURCE

The internal power supply accepts universal line voltage. Any mains supply from 100 to 240
VAC, 50 to 60 Hz, may be used without modification or adjustment. A universal power
connector is provided on the rear of the unit to facilitate connection to the power mains.

POWER CONNECTION

The unit is supplied (in the US and UK only) with a three conductor power cord. The “ground”
conductor is directly connected to the chassis.

INPUT / OUTPUT CONNECTIONS

The fiber optic connection is made via a FC/PC connector located at the back of the unit. Be
sure to allow sufficient room for the required minimum bend radius of the fiber cable used.

Video input and output connections are located on the rear of the unit. A BNC connector is
provided for each channel. Please note that video channels five and six are not used in this unit.
The video inputs are connected to an appropriate 75Ω baseband source such as a camera or a
video recorder output. The 75Ω video outputs can be looped through typical baseband video
inputs of switchers, recorders and other equipment as required. For proper operation, the
outputs must be terminated with 75Ω. For optimum performance the video cables should be the
shortest length of coax practical.

Data input and output connections are located on the rear panel terminal block. A mating plug
connector is provided. The figure below identifies the specific connections for RS422 / Contact
Closure data. See next page for RS485 data connections.

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