Electromagnetic Compatibility - SonicWALL SMA Series Safety And Regulatory Reference Manual

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Electromagnetic Compatibility

Electromagnetic Interference (EMI) is any signal or emission, radiated in free space or conducted
along power or signal leads, that endangers the functioning of 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 radio services, and unlicensed radio services, such as WLAN or Bluetooth,
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.
SonicWall products are designed, tested, and classified for their intended electromagnetic
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environment. These electromagnetic environment classifications generally refer to the following
harmonized definitions:
Class B products are intended for use in residential/domestic environments but may also be used
in non-residential/non-domestic environments.
NOTE:
broadcast radio and television receivers may be expected within a distance of 10
m (33 feet) from where this product is used.
Class A products are intended for use in non-residential/non-domestic environments. Class A
products may also be utilized in residential/domestic environments, but may cause interference
and require the user to take adequate corrective measures.
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.
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Relocate the computer with respect to the receiver.
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Move the computer away from the receiver.
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Plug the computer into a different outlet so that the computer and the receiver are on
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different branch circuits.
If necessary, consult a SonicWall Technical Support representative or an experienced
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radio/television or EMC technician for additional suggestions.
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
SonicWall device to reduce the possibility of interference with radio communications services. Using
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The residential/domestic environment is an environment where the use of
SonicWall SMA 6210-7210
Safety and Regulatory Reference Guide
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