2
INSTALLATION AND OPERATION INSTRUCTIONS
INTRODUCTION
Thank you for purchasing your American Fibertek MRM-1200B multimode mini video receiver. Please
take a few minutes to read these installation instructions in order to obtain the maximum performance
from this product.
FUNCTIONAL DESCRIPTION
The MRM-1200B operates as half of a transmitter / receiver pair for the transmission of baseband
NTSC, PAL, RS170, or RS343 video signals with Manchester / Bi-phase return code for American
Dynamics / Bosch systems. It is designed to operate with the MTM-1200B or RTM-1200B video
transmitter over a single multimode fiber optic cable.
The MRM-1200B converts an optical fiber input into a single video output using a 1300 nm wavelength
detector. The MRM-1200B also converts an electronic camera control signal into an optical control
signal returning on the same fiber using an 850 nm wavelength source. The M1200B Series product is
designed to operate over an optical loss budget range of 0 to 12 dB. The MRM-1200B 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 aluminum housing with internal dc voltage regulation.
The detachable terminal block and LED indicator provide for easy installation and monitoring of video
and dc power.
The MRM-1200B is designed for mounting as a modular stand alone unit. For a rack mounted version
please see the RRM-1200B.
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. 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
The unit requires a +12VDC power source for proper operation. The DC input is diode protected. In the
USA and in Canada an American Fibertek PS-12 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.
POWER CONNECTION
Power is supplied to the unit via a two pin terminal connector. Follow the label on the unit for proper
orientation of +12 volt dc and ground.
VIDEO OUTPUT CONNECTION
The video output connection is made via a BNC connector on the side of the unit. The 75
Ω
video output
can be looped through typical baseband video inputs of switchers, recorders and other equipment as
required. For proper operation, the output must be terminated with 75
Ω
. For optimum performance the
video cables should be the shortest length of coax practical.
FIBER CONNECTION
The fiber optic connection is made via a ST connector located on the side of the unit.