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INSTALLATION AND OPERATION INSTRUCTIONS
INTRODUCTION
Thank you for purchasing your American Fibertek MT-404 multimode four channel video
transmitter. Please take a few minutes to read these installation instructions in order to
obtain the maximum performance from this product.
FUNCTIONAL DESCRIPTION
The MT-404 operates as half of a transmitter / receiver pair for the transmission of four
simultaneous, real time, baseband NTSC, PAL, RS170, or RS343 video signals over a
single multimode fiber optic cable. It is designed to operate with the MR-404 or RR-404
four channel video receiver.
The MT-404 transmitter accepts up to four video inputs. Each video input modulates a
separate FM carrier frequency to allow the total of four video signals to be combined
onto one fiber. The 404 Series product is designed to operate over an optical loss
budget range of 0 to 6 dB with a maximum distance of up to 1.5 km. The MT-404
operates on 50 um or 62.5 um multimode fiber. Refer to the data sheets for detailed
performance specifications.
This unit is contained in a compact and rugged extruded aluminum housing with internal
dc voltage regulation. The detachable terminal block and LED indicators provide for easy
installation and monitoring of video and power supply.
The MT-404 is designed for mounting as a modular stand alone unit. For a rack mounted
version please see the RT-404.
INSTALLATION
THE INSTALLATION OF THIS UNIT SHOULD BE MADE BY A QUALIFIED SERVICE
PERSON(S) AND MUST CONFORM TO ALL LOCAL CODES.
Mount the unit to a secure surface using #8 (3mm) hardware in four places. Mounting
dimensions can be found on the connection diagram included with this manual. Be sure
to allow sufficient room for the required minimum bend radius of the fiber cable used.
POWER SOURCE
Power to the unit must be within the specifications listed. A 24VAC center tap
transformer rated at 10VA is required. In the USA and Canada an American Fibertek
PS-24CT-T is supplied with this unit.
POWER CONNECTION
Power is supplied to the unit via a three pin Phoenix connector. The ground wire from
the center tap supply must be connected to the center pin of the Phoenix connector.
When installed properly, the voltage measured from the center pin to either of the
outside pins will be 12 volts AC and voltage measured from one outside pin to the other
outside pin will be 24 volts AC.
INPUT / OUTPUT CONNECTIONS
The fiber optic connection is made via a ST connector located on the left side of the unit.