182 Appendix2 With a soft, lint-free cloth, gently wipe the bottom of the disc (the unlabeledside) in a straight line from the center to the outer edge of the disc.For stubborn dirt, try using water or a diluted solution of water and mildsoap. You can also purchase commercial products that clean discs andprovide some protection from dust, fingerprints, and scratches. Cleaningproducts for CDs are also safe to use on DVDs.FCC Notice (U.S. Only)FCC Class BThis equipment generates, uses, and can radiate radio frequency energy and,if not installed and used in accordance with the manufacturer’s instructionmanual, may cause interference with radio and television reception. Thisequipment has been tested and found to comply with the limits for a Class Bdigital device pursuant to Part 15 of the FCC Rules.This device complies with Part 15 of the FCC Rules. Operation is subject tothe following two conditions:• This device may not cause harmful interference.• This device must accept any interference received, including interferencethat may cause undesired operation.NOTICE: The FCC regulations provide that changes or modifications not expresslyapproved by Dell Inc. could void your authority to operate this equipment.These limits are designed to provide reasonable protection against harmfulinterference in a residential installation. However, there is no guarantee thatinterference will not occur in a particular installation. If this equipment doescause harmful interference with radio or television reception, which can bedetermined by turning the equipment off and on, you are encouraged to tryto correct the interference by one or more of the following measures:• Reorient the receiving antenna.• Relocate the system with respect to the receiver.• Move the system away from the receiver.• Plug the system into a different outlet so that the system and the receiverare on different branch circuits.