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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 theproduct you purchased, you candetermine theFCC Class andtherefore whichof the two
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 Aproducts onlydisplaya simplewarning statementofone paragraph inlength regardinginterference and
undesired operation. Mostof our products are FCC Class A.The FCC ruleshave restrictions regarding the 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 equipmentgenerates anduses radio frequency energy and,if notinstalled andused instrict accordancewith the
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 modifications not expressly approved by NationalInstruments couldvoid the user’s authority tooperate
the equipment under the FCC Rules.
Class A
Federal Communications Commission
This equipment has been tested andfound to comply with thelimits for a Class A digital device, pursuant to part 15
of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the
equipmentis operatedin acommercialenvironment. This equipmentgenerates,uses,and canradiateradio frequency
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 digital apparatus meets all requirements of 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 been tested 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 will notoccur ina particular installation. Ifthis equipmentdoes causeharmful
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.