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Installation
2.1 Unpacking
The DM240 Modulator was carefully packaged to avoid damage and should arrive complete with
the following items for proper installation:
1.
DM240 Unit.
2.
PCMCIA Card. May be installed, depending upon configuration. If no card is
installed, the unit has been factory configured.
3.
Power Cord, 6-foot with applicable AC connector.
4.
Installation and Operation Manual.
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 DM240 modulator is shipped fully assembled. It does not require removal of the covers for
any purpose in installation. The only replaceable assembly in the unit is the data interface and is
not intended to be accomplished in the field. 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, < 40 W.
2.3 Mounting Considerations
When mounted in an equipment rack, adequate ventilation must be provided. The ambient
temperature in the rack should 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 DM240 units may
be stacked one on top of the other up to a maximum of 10 consecutive units before providing a
1 RU space for airflow.
Do not mount the DM240 in an unprotected outdoor location where there is direct contact with
rain, snow, wind or sun. The DM240 is designed for indoor applications only.
The only tools required for rack mounting the DM240 is a set of four rack mounting screws and an
appropriate screwdriver. Rack mount 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.
2.4 Modulator Checkout
The following descriptions assume that the DM240 is installed in a suitable location with prime AC
power and supporting equipment available.
2-2
DM240-DVB High-Speed Digital Modulator
TM083 - Rev. 3.0
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