American Fibertek MRX-91685C-SL User Manual
Page 4

4
To install the MTX-91685C-SL or MRX-91685C-SL 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. When mounting 
the MTX-91685C-SL or MRX-91685C-SL in a 
rack configuration, it is recommended that 
sufficient airflow is available through the unit. 
This can be achieved by leaving a 1RU slot above the unit open for air movement and by 
leaving open space along the sides of the unit. 
 
For mounting the unit flush to a wall or other rigid 
surface, the ears may be installed on the sides 
with the oval holes flush with the bottom of the unit 
as in Figure 2. Mount the ears with the #10 
flathead screws provided. Mount the unit to a rigid 
surface using #10 (5mm) screws. 
 
POWER SOURCE 
The internal power supply accepts universal line voltage. Any mains supply from 100 to 240 
VAC, 50 to 60 Hz, may be used without modification or adjustment. A universal power 
connector is provided on the rear of the unit to facilitate connection to the power mains. 
 
POWER CONNECTION 
The unit is supplied with a three conductor power cord (US, UK, or Euro). The “ground” 
conductor is directly connected to the chassis. 
 
FIBER CONNECTION
The fiber optic connection is made via a FC connector located at the back of the unit. Be sure to 
allow sufficient room for the required minimum bend radius of the fiber cable used. 
 
VIDEO INPUT / OUTPUT CONNECTIONS 
Video input and output connections are located on the rear of the unit. A BNC connector is 
provided for each channel. The video inputs are connected to an appropriate 75
 baseband
video source such as a camera or a video recorder output. The 75
 video outputs can be
looped through typical baseband video inputs of switchers, recorders and other equipment as 
required. For proper operation, the outputs must be terminated with 75
. For optimum
performance the video cables should be the shortest length of coax practical.
