Comtech EF Data QAM256 - Manual (Page 13)

Installation QAM256 Digital Video Modulator and Upconverter
2-2 TM077 - Rev. 4.0
2.2 Removal and Assembly
Carefully unpack the unit and ensure that all of the above items are in the carton. If the Prime AC
power available at the installation site requires a different Power Cord/AC Connector, then
arrangements to receive the proper device will be necessary before proceeding with the
installation.
The QAM256 unit is shipped fully assembled and does not require removal of the covers for any
purpose in installation. Should the power cable AC connector be of the wrong type for the
installation, either the cable or the power connector end should be replaced. The power supply
itself is designed for universal application using from 100 to 240 VAC, 50 to 60 Hz, 1 A.
Always ensure that power is removed from the QAM256 before removing
or installing a UIM. Failure to do so may cause damage to the equipment.
2.3 Mounting Considerations
When mounted in an equipment rack, adequate ventilation must be provided. The ambient
temperature in the rack should preferably be between 10
° and 35°C, and held constant for best
equipment operation. The air available to the rack should be clean and relatively dry. The
modems may be stacked one on top of the other to a maximum of 10 consecutive units before
providing one (1) RU of space for airflow. Modems should not be placed immediately above a
high-heat or EMF Generator to ensure the output signal integrity and proper receive operation.
Do not mount the QAM256 in an unprotected outdoor location where there is direct contact with
rain, snow, wind or sun. The only tools required for rack mounting the QAM256 are four (4)
customer supplied rack-mounting screws and the appropriate screwdriver. Rack mounting
brackets are an integral part of the cast front bezel of the unit and are not removable.
Shielded cables with the shield terminated to the conductive backshells are required in order to
meet EMC directives. Cables with insulation flammability ratings of 94 VO or better are required
in order to meet low voltage directives.