American Fibertek MR-944C User Manual

f

k

a

i

american fiberte

Instruction Manual

MR-944C

Four Channel Video Receiver

With One Bi-Directional

Multi-Protocol Data Channel

11/30/2012 JPK

Table of Contents

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

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

Power Source.............................................................................................. 3

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

Fiber Connection ......................................................................................... 4

Video Input Connections ............................................................................. 4

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

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

Data Configuration Switches ....................................................................... 5

Data Termination And Offset Bias Switches................................................ 6

RS485 Data Termination And Offset Bias................................................... 6

MR-944C Status LED Indicators.................................................................. 7

Warranty and Service Information............................................................... 8

2

INSTALLATION AND OPERATION INSTRUCTIONS

INTRODUCTION

Thank you for purchasing your American Fibertek Series 944C multimode four channel video
multiplexer with bi-directional multi-protocol data. Please take a few minutes to read these installation
instructions in order to obtain the maximum performance from this product.

FUNCTIONAL DESCRIPTION

The MR-944C operates as half of a transmitter / receiver pair for the digital transmission of four
simultaneous NTSC or PAL video signals along with one channel of field configurable bi-directional
data.over one multimode fiber optic cable. The data channel may be configured as RS485 data, RS422
data, RS232 data, or Manchester data. The RS485 channel may be configured for 2-wire (half duplex)
or 4-wire (full duplex) with or without biasing. Switch selectable internal 120 ohm terminations are
available for RS422 or RS485 data.

NOTE: This unit is shipped with Data Channel in the RS485 4-wire configuration. For other
configurations, please refer to the DATA CONFIGURATION section for changes to the default
switch settings.

NOTE: This unit is shipped with data terminations off and data bias off. For other
configurations, please refer to the DATA TERMINATION / BIAS section for changes to the
default switch settings.

The MR-944C receives a high speed data stream modulated onto a 1310 nm optical wavelength and
then de-multiplexes this signal into four video input signals along with one multi-protocol data signal.
The MR-944C also transmits a return multi-protocol data channel onto a 1550 nm optical wavelength.

This unit is contained in a rugged aluminum housing with internal dc voltage regulation. The detachable
terminal blocks and LED indicators provide for easy installation and monitoring of video, data, and
optical power.

The MR-944C is designed for mounting as a modular stand alone unit. For a rack mounted version
please see the RR-944C.

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.

Mount the unit to a secure surface using #8 (3mm) hardware in four places. See the drawing on the
next page for mounting dimensions. Be sure to allow sufficient room for the required minimum bend
radius of the fiber cable used.

POWER SOURCE

THIS PRODUCT SHALL BE POWERED BY A LISTED CLASS 2 POWER SUPPLY ONLY.
This unit requires a +12VDC power source with a current rating of 1.25 amps for proper operation. The

DC input is diode protected. In the USA and in Canada an American Fibertek PS-12D is supplied with
this unit. The negative side of the power input is directly connected to ground. ANSI/NFPA 70 Class 2
wiring is recommended.

3