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FCC/Canada Radio Frequency Interference Compliance*
Determining FCC Class
The Federal Communications Commission (FCC) has rules to protect wireless communications from interference.
The FCC places digital electronics into two classes. These classes are known as Class A (for use in industrial-
commercial locations only) or Class B (for use in residential or commercial locations). Depending on where it is
operated, this product could be subject to restrictions in the FCC rules. (In Canada, the Department of
Communications (DOC), of Industry Canada, regulates wireless interference in much the same way.)
Digital electronics emit weak signals during normal operation that can affect radio, television, or other wireless
products. Byexamining theproductyou purchased, youcan determinethe FCCClass andtherefore whichof thetwo
FCC/DOC Warnings apply in the following sections. (Some products may not be labeled at all for FCC; if so, the
reader should then assume these are Class A devices.)
FCCClass Aproductsonlydisplay asimplewarningstatement ofoneparagraphin lengthregarding interferenceand
undesired operation. Mostof ourproducts are FCCClass A. The FCCrules have restrictions regardingthe locations
where FCC Class A products can be operated.
FCC Class B products display either a FCC ID code, starting with the letters EXN,
or the FCC Class B compliance mark that appears as shown here on the right.
Consult the FCC web site
http://www.fcc.gov
for more information.
FCC/DOC Warnings
This equipmentgeneratesand usesradio frequencyenergy and,if notinstalled and usedin strictaccordance withthe
instructions in this manual and the CE Mark Declaration of Conformity**, may cause interference to radio and
television reception. Classification requirements are the same for the Federal Communications Commission (FCC)
and the Canadian Department of Communications (DOC).
Changes or modificationsnot expresslyapproved byNational Instruments could void the user’s authority tooperate
the equipment under the FCC Rules.
Class A
Federal Communications Commission
This equipment has been testedand found to comply withthe limits for aClass A digital device,pursuant to part 15
of the FCC Rules. These limits are designed toprovide reasonable protection against harmful interference when the
equipmentis operatedina commercialenvironment.Thisequipmentgenerates,uses,and canradiateradiofrequency
energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to
radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in
which case the user will be required to correct the interference at his own expense.
Canadian Department of Communications
This ClassA digitalapparatus meetsall requirementsof the CanadianInterference-Causing Equipment Regulations.
Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du
Canada.
Class B
Federal Communications Commission
This equipment has beentested and found to comply withthe limits for a Class B digital device, pursuant to part 15
of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio communications. However,
there is no guarantee thatinterference willnot occurin aparticular installation. Ifthis equipmentdoes causeharmful
interference toradio or television reception, which canbe determined by turning the equipment off and on, theuser
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.