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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 digitalelectronics into twoclasses. Theseclasses areknown asClass A (foruse inindustrial-commercial locationsonly)
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. By
examining the product you purchased, you can determine the FCC Class and therefore which of the two FCC/DOC Warnings
apply in the followingsections. (Someproducts maynot belabeled at all forFCC;if so,the readershould thenassume theseare
Class A devices.)
FCC Class Aproducts onlydisplay asimple warningstatement ofone paragraph in length regarding interferenceand undesired
operation. Most of our products are FCC Class A. The FCC rules have restrictions regarding the locations where FCC ClassA
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
Thisequipmentgeneratesanduses radiofrequency energyand,if notinstalledand usedinstrictaccordancewiththeinstructions
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 National Instruments could void the user’s authority to operate the
equipment under the FCC Rules.
Class A
Federal Communications Commission
This equipmenthas beentested and found tocomply with thelimits for aClass Adigital device, pursuantto part 15of the FCC
Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated
in a commercial environment. This equipment generates, uses, and can radiate radio 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 Class A digital apparatus meets all requirements of the Canadian Interference-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 with the limits for a Class B digital device, pursuant to part 15 of the
FCC Rules. Theselimits are designedto provide reasonableprotection against harmfulinterference in aresidential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the
instructions,may causeharmfulinterferenceto radiocommunications. However,there isnoguarantee thatinterferencewill not
occur in a particular installation. If this equipment does cause harmful 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.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.