Regulatory Notices D-137Appendix DRegulatory NoticesFCC Notices (U.S. Only)Most Dell computer systems are classified by the FederalCommunications Commission (FCC) as Class B digitaldevices. However, the inclusion of certain optionschanges the rating of some configurations to Class A. Todetermine which classification applies to your computersystem, examine all FCC registration labels located onthe back panel of your computer, on card-mountingbrackets, and on the cards themselves. If any one of thelabels carries a Class A rating, your entire system is con-sidered to be a Class A digital device. If all labels carryeither the Class B rating or the FCC logo ( ), your sys-tem is considered to be a Class B digital device.Once you have determined your system’s FCC classifica-tion, read the appropriate FCC notice. Note that FCCregulations provide that changes or modifications notexpressly approved by Dell Computer Corporation couldvoid your authority to operate this equipment.Class ANOTE: This equipment generates, uses, and can radiateradio frequency energy and, if not installed and used inaccordance with the manufacturer’s instruction manual,may cause harmful interference with radiocommunications. This equipment has been tested andfound to comply with the limits for a Class A digitaldevice pursuant to Part 15 of the FCC Rules. These limitsare designed to provide reasonable protection againstharmful interference when the equipment is operated in acommercial environment. Operation of this equipment ina residential area is likely to cause harmful interference,in which case you will be required to correct the interfer-ence at your own expense.Class BNOTE: This equipment generates, uses, and can radiateradio frequency energy and, if not installed and used inaccordance with the manufacturer’s instruction manual,may cause interference with radio and television recep-tion. This equipment has been tested and found to complywith the limits for a Class B digital device pursuant toPart 15 of the FCC Rules. These limits are designed toprovide reasonable protection against harmful interfer-ence in a residential installation. However, there is noguarantee that interference will not occur in a particularinstallation. If this equipment does cause harmful inter-ference with radio or television reception, which can bedetermined by turning the equipment off and on, you areencouraged to try to correct the interference by one ormore of the following measures:• Reorient the receiving antenna.• Relocate the computer with respect to the receiver.• Move the computer away from the receiver.• Plug the computer into a different outlet so that thecomputer and the receiver are on different branchcircuits.If necessary, consult a representative of Dell ComputerCorporation or an experienced radio/television technicianfor additional suggestions. You may find the followingA Notice About Shielded Cables: Use onlyshielded cables for connecting peripherals to anyDell device to reduce the possibility of interferencewith radio and television reception. Using shieldedcables ensures that you maintain the appropriateFCC radio frequency emissions compliance (for aClass A device) or FCC certification (for a Class Bdevice) of this product. For parallel printers, acable is available from Dell ComputerCorporation.