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Preparing for Installation 2-5
CISPR 22 Requirements
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Note If the system contains several subsystems/cards then the warning notice has only to
appear in the main control systems user manual/guide.
CISPR 22 Requirements
Specifications covered:
• EN55022:1994 - EU requirements
• AS/NZS 3548:1995 - Australia
Site Requirements
To assure normal operation and avoid unnecessary maintenance, plan your site
configuration and prepare your site before installation. After installation, make sure the site
maintains an ambient temperature of
23° to 113°F (-5° to 45°C), and keep the area around the
chassis as free from dust as is practical.
The following sections address the site environment requirements for the Cisco uBR904
cable modem.