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INSTALLATION AND OPERATION INSTRUCTIONS
INTRODUCTION
Thank you for purchasing your American Fibertek RTM-1200B multimode mini 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 RTM-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 MRM-1200B or RRM-1200B video
receiver over a single multimode fiber optic cable.
The RTM-1200B converts a single video input into an optical output using a 1300 nm wavelength
source. The RTM-1200B also converts an optical control signal returning on the same fiber into an
electronic camera control signal using an 850 nm wavelength detector. The M1200B Series product is
designed to operate over an optical loss budget range of 0 to 12 dB. The RTM-1200B 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 dc power.
The RTM-1200B is designed for rack mounting only. For a modular stand alone version please see the
MTM-1200B.
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-1200B can be inserted
into the subrack or removed from the subrack with power applied to the backplane.
VIDEO INPUT CONNECTION
The video input connection is made via a BNC connector on the back of the unit. The video input
should be connected to an appropriate 75Ω baseband video source such as a camera or a video
recorder output. 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 back of the unit. Be sure to allow
sufficient room for the required minimum bend radius of the fiber cable used.
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