Compliance

FCC/Canada Radio Frequency Interference Compliance

Determining FCC Class

TheFederal Communications Commission (FCC) has rules to protect wireless communications from interference. The FCC
placesdigital electronics into two classes. These classes are known as Class A (for use in industrial-commercial locations only)
orClass B (for use in residential or commercial locations). Depending on where it is operated, this product could be subject to
restrictionsin the FCC rules. (In Canada, the Department of Communications ( DOC), of Industry Canada, regulates wireless
interferencein much the same way.)
Digitalelectronics emit weak signals during normal operation that can affect radio, television, or other wireless products. By
examiningthe product you purchased, you can determine the FCC Class and therefore which of the two FCC/DOC Warnings
applyin the following sections. (Some products may not be labeled at all for FCC; if so, the reader should then assume these are
ClassA devices.)
FCCClass A products only display a simple warning statement of one paragraph in length regarding interference and undesired
operation.Most of our products are FCC Class A. The FCC rules have restrictions regarding the loca tions where FCC Class A
productscan be operated.
FCCClass B products display either a FCC ID code, starting with the letters EXN,
orthe FCC Class B compliance mark that appears as shown here on the right.
Consultthe FCC Web site at http://www.fcc.gov for more information.

FCC/DOC Warnings

Thisequipment generates and uses radio frequency energy and, if not installed and used in strict accordance with the instructions
inthis manual and the CE Marking Declaration of Conformity*, may cause interference to radio and television re ception.
Classificationrequirements are the same for the Federal Communications Commission (FCC) and the Canadian Department
ofCommunications (DOC).
Changesor modifications not expressly approved by National Instruments could void the user’s authority to operate the
equipmentunder the FCC Rules.

Class A

Federal Communications Commission
Thisequipment has been tested and found to comply with the limits for a Class A digitaldevice, pursuant to part 15 of the FCC
Rules.These limits are designed to provide reasonable protection against harmful interference when the equipment is operated
ina commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and
usedin accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this
equipmentin a residential area is likely to cause harmful interference in which case the user will be required to correct
theinterference at his own expense.
Canadian Department of Communications
ThisClass A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.
Cetappareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleurdu Canada.

Class B

Federal Communications Commission
Thisequipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the
FCCRules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
Thisequipment 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 that interference will not
occurin a particular installation. If this equipment does cause harmful interference to radio or television reception, which can
bedetermined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of
thefollowing measures:
•Reorientor relocate the receiving antenna.
•Increasethe separation between the equipment and receiver.
•Connectthe equipment into an outlet on a circuit different from that to which the rec eiver is connected.
•Consultthe dealer or an experienced radio/TV technician for help.