Regulatory Notices - Dell PRECISION WCM Information Manual

1-6 Dell Precision WorkStations System Information Guide

Regulatory Notices

Electromagnetic Interference (EMI) is any signal or emission, radiated in free space or
conducted along power or signal leads, that endangers the functioning of a radio navigation
or other safety service or seriously degrades, obstructs, or repeatedly interrupts a licensed
radio communications service. Radio communications services include but are not limited
to AM/FM commercial broadcast, television, cellular services, radar, air-traffic control,
pager, and Personal Communication Services (PCS). These licensed services, along with
unintentional radiators such as digital devices, including computer systems, contribute to
the electromagnetic environment.
Electromagnetic Compatibility (EMC) is the ability of items of electronic equipment to
function properly together in the electronic environment. While this computer system has
been designed and determined to be compliant with regulatory agency limits for EMI, there
is no guarantee that interference will not occur in a particular installation. If this equipment
does cause interference with radio communications services, which can be determined by
turning the equipment off and on, you are encouraged to try to correct the interference by
one or more of the following measures:
Reorient the receiving antenna.
Relocate the computer with respect to the receiver.
Move the computer away from the receiver.
Plug the computer into a different outlet so that the computer and the receiver are on
different branch circuits.
If necessary, consult a Technical Support representative of Dell Computer Corporation or an
experienced radio/television technician for additional suggestions. You may find the FCC
Interference Handbook, 1986, to be helpful. It is available from the U.S.
Government Printing Office, Washington, DC 20402, Stock No. 004-000-00450-7 or on the
World Wide Web at http://www.fcc.gov/Bureaus/Compliance/WWW/tvibook.html.
Dell computer systems are designed, tested, and classified for their intended
electromagnetic environment. These electromagnetic environment classifications generally
refer to the following harmonized definitions:
Class A is typically for business or industrial environments.
Class B is typically for residential environments.
Information Technology Equipment (ITE), including peripherals, expansion cards, printers,
input/output (I/O) devices, monitors, and so on, that are integrated into or connected to the
system should match the electromagnetic environment classification of the computer system.
A Notice About Shielded Signal Cables: Use only shielded cables for connecting
peripherals to any Dell device to reduce the possibility of interference with radio
communications services. Using shielded cables ensures that you maintain the
appropriate EMC classification for the intended environment. For parallel printers, a
cable is available from Dell Computer Corporation. If you prefer, you can order a
cable from Dell Computer Corporation on the World Wide Web at http://
www.dell.com/products/dellware/index.htm.
Most Dell computer systems are classified for Class B environments. To determine the
electromagnetic classification for your system or device, refer to the following sections
specific for each regulatory agency. Each section provides country-specific EMC/EMI or
product safety information.