36 37
POTENTIAL FOR ELECTROMAGNETIC
INTERFERENCE
Toavoidinaccurateresultscausedbyelectromagneticinterferencebetween
electricalandelectronicequipment,donotusethedevicenearacell
phone or microwave oven. For most wireless communication devices, it is
recommendedtomaintainadistanceof10.8feet(3.3m)inordertoavoid
electromagnetic interference.
ThisdevicecomplieswithPart15oftheFCCRules.Operationissubjecttothe
followingtwoconditions:(1)thisdevicemaynotcauseharmfulinterference,
and (2) this device must accept any interference received, including
interference that may cause undesired operation.
NOTE: ThemanufacturerisnotresponsibleforanyradioorTVinterference
causedbyunauthorizedmodificationstothisequipment.Suchmodifications
couldvoidtheuserauthoritytooperatetheequipment.
NOTE: Thisequipmenthasbeentestedandfoundtocomplywiththelimits
foraClassBdigitaldevice,pursuanttoPart15oftheFCCRules.Theselimits
are designed to provide reasonable protection against harmful interference
inaresidentialinstallation.Thisequipmentgenerates,usesandcanradiate
radiofrequencyenergyand,ifnotinstalledandusedinaccordancewith
the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular
installation.Ifthisequipmentdoescauseharmfulinterferencetoradioor
televisionreception,whichcanbedeterminedbyturningtheequipmentoff
and on, the user is encouraged to try to correct the interference by one or
moreofthefollowingmeasures:
•Reorientorrelocatethereceivingantenna.
•Increasetheseparationbetweentheequipmentandreceiver.
•Connecttheequipmentintoanoutletonacircuitdifferentfromthat
to which the receiver is connected.
•Consultthedealeroranexperiencedradio/TVtechnicianforhelp.
ELECTROMAGNETICCOMPATIBILITY(EMC)
• Guidanceandmanufacturer’sdeclaration–electromagneticemissions
Thedeviceisintendedforuseintheelectromagneticenvironmentslistedbelow,andshouldonlybe
usedinsuchenvironments:
Emissions test Compliance Electromagneticenvironment–guidance
RFemissionsCISPR11 Group1 RFenergyisusedonlytomaintaindevice’soperation.
Therefore,itsRFemissionsaresolowthatit’snotlikelyto
causeanyinterferenceinnearbyelectronicequipment.
RFemissionsCISPR11 Class B
HarmonicemissionsIEC
61000-3-2 Class A Thedeviceissuitableforuseinallestablishments,
including domestic establishments, and those directly
connected to the public low-voltage power supply network
that supplies buildings used for domestic purposes.
Voltageuctuations/icker
emissionsIEC61000-3-3 Complies
•Guidanceandmanufacturer’sdeclaration–electromagneticimmunity
Thedeviceisintendedforuseintheelectromagneticenvironmentslistedbelow,andshouldonlybe
usedinsuchenvironments:
Immunity test IEC 60601 test level Compliance level Electromagneticenvironment–
guidance
Electrostatic
discharge(ESD)
IEC61000-4-2
±6kVcontact
±8kVair ±6kVcontact
±15kVair Therelativehumidityshouldbeat
least5%.
Powerfrequency
(50/60Hz)
magnetic field
IEC61000-4-8
3A/m 30A/m Powerfrequencymagneticelds
should be at levels characteristic of
a typical location in a typical com-
mercial or hospital environment.
Recommendedseparationdistance
I
r = --------- (m)
188
where I is the current in amperes in
a power bus or an appliance wire
and r is the recommended separa-
tion distance between your device
and the power bus or appliance
wire, in meters (m).
Electricalfast
transient/burst
IEC61000-4-4
±2kVforpowersupply
lines
±1kVforinput/output
lines
±2kVforpower
supply lines
±1kVforinput/
output lines
Mainspowerqualityshouldbethat
of a typical commercial or hospital
environment.
Surge
IEC61000-4-5
±1kVline(s)toline(s)
±2kVline(s)toearth
±1kVline(s)to
line(s)
±2kVline(s)to
earth
Mainspowerqualityshouldbethat
of a typical commercial or hospital
environment.