Panasonic RTM-1485 Operating Instructions

Instruction Manual

RTM-1485

Video Transmitter

With Bi-directional RS485

© Copyright 2003, American Fibertek, Inc. 0821JD

Table of Contents

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

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

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

Power Connection.............................................................................. 3

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

Data Configuration ............................................................................. 4

Switch/Jumper Settings...................................................................... 5

RTM-1485 Status LED Indicators.......................................................6

RS-485 Termination and Offset Bias Requirements .......................... 7

Warranty............................................................................................. 8

Service Information ............................................................................ 8

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INSTALLATION AND OPERATION INSTRUCTIONS

INTRODUCTION

Thank you for purchasing your American Fibertek RTM-1485 multimode video
transmitter with RS485 transceiver. Please take a few minutes to read these installation
instructions in order to obtain the maximum performance from this product.

FUNCTIONAL DESCRIPTION

The RTM-1485 operates as half of a transmitter / receiver pair for the transmission of
baseband NTSC, PAL, RS170, or RS343 video signals and bi-directional RS485 data. It
is designed to operate with the MRM-1485 or RRM-1485 video receiver with RS485
transceiver over a single multimode fiber optic cable.

The RTM-1485 converts a single video input along with a single RS485 input into a FM
modulated optical fiber output using a 1300 nm wavelength source. The RTM-1485 also
converts an optical RS485 signal returning on the same fiber into an electronic RS485
output using an 850 nm wavelength detector. This unit may be configured for two wire
half duplex or four wire full duplex electrical interfaces. The M1485 Series product is
designed to operate over an optical loss budget range of 0 to 12 dB. The RTM-1485
operates on 50 um or 62.5 um multimode fiber. Refer to the data sheets for detailed
performance specifications.

This unit is designed for rack mounting in any of the three American Fibertek subracks
available. The subrack model numbers are SR-20/1, SR-20R/1, and SR-20/2. Slide in
rack mounting and LED indicators provide for easy installation and monitoring of video
and power.

The RTM-1485 is designed for rack mounting only. For a modular stand alone version
please see the MTM-1485.

INSTALLATION

THE INSTALLATION OF THIS UNIT SHOULD BE MADE BY A QUALIFIED SERVICE
PERSON(S) AND MUST CONFORM TO ALL LOCAL CODES.

The unit slides into any open slot in the SR-20 subrack. Use a small screwdriver to push
and lock the two ¼ turn fasteners into place.

POWER SOURCE

Power to the unit is supplied by the subrack. Please refer to the SR-20 and PSR
instructions for further details.

POWER CONNECTION

Power is supplied to the unit via a four finger backplane connector. The RTM-1485 can
be inserted into the subrack or removed from the subrack with power applied to the
backplane.

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