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INSTALLATION AND OPERATION INSTRUCTIONS
INTRODUCTION
Thank you for purchasing your American Fibertek Series 8485 multimode four channel
video multiplexer with bi-directional data. Please take a few minutes to read these
installation instructions in order to obtain the maximum performance from this product.
FUNCTIONAL DESCRIPTION
The 8485 Series units operate as a transmitter / receiver pair for the transmission of four
simultaneous, real time baseband NTSC/PAL video signals with field configurable bi-
directional data over a single multimode fiber optic cable.
This link can accommodate either a single RS485 interface (2 or 4 wire) or both an
RS422 and RS232 interface. When used in RS422/RS232 mode, each interface
functions independent of the other. These units are factory shipped configured in the
RS485 (4 wire) configuration.
The MTX-8485 transmitter accepts four video inputs and multiplexes these signals along
with the data signals onto a single optical output port for connection to the fiber
transmission system. Correspondingly, the MRX-8485 receiver converts the optical
signal to four independent video output signals along with the data signals.
The 8485 Series units operate on 50 um or 62.5 um multimode fiber. Refer to the data
sheets for detailed performance specifications.
The individual units may be configured for rack mounting or wall mounting depending
upon the position of the included mounting hardware.
INSTALLATION
THE INSTALLATION OF THESE UNITS SHOULD BE MADE BY A QUALIFIED
SERVICE PERSON(S) AND MUST CONFORM TO ALL LOCAL CODES.
To install the MTX-8485 or MRX-8485 it is first necessary to mount the rack flanges to
the unit.
For rack mounting the ears are installed on the
sides of the unit with the surfaces that have
oval holes flush with the front of the unit as in
Figure 1. Mount the ears with the #10 flathead
screws provided. To mount in the rack cabinet,
use mounting screws that are appropriate for
the rack cabinet being used.
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