The equipment described in this manual generates and uses radio-frequency energy. If it is not installed and used properly—that is, in strict accordance with our instructions—it may cause interference with radio and television reception.

This equipment has been tested and complies with the limits for a Class B computing device in accordance with the specifications of Subpart J, Part 15, of FCC rules. These rules are designed to provide reasonable protection against such interference in a residential installation. However, these is no guarantee that the interference will not occur in a particular installation, especially if a "rabbit-ear" television antenna is used. (A rabbit-ear antenna is the telescoping-rod type usually found on television receivers.)

You can determine whether your computer is causing the interference by turning it off. If the interference stops, it was probably caused by the computer or its peripheral devices. To further isolate the problem, disconnect the peripheral devices and their input/output cables one at a time. If the interference stops, it was caused by either the peripheral device or the I/O cable. These devices usually require shielded I/O cables. For Apple peripherals, you can obtain the proper shielded cable from you dealer. For non-Apple peripheral devices, contact the manufacturer or dealer for assistance.

A shielded cable has a metallic wrap around the wires to reduce the potential effects of radio-frequency interference.


Important

Your Apple computer and its peripheral devices were FCC-certified under test conditions that included they use of shielded cables and connectors between system components. It is important that you use shielded cables and connectors to reduce the possibility of causing interference to radio, television, and other electronic devices.


If your computer does cause interference to radio and television reception, you can try to correct the interference by using one or more of the following measures:

  • Turn the television or radio antenna until the interference stops.
  • Move the computer to one side or the other of the television or radio.
  • Move the computer farther away from the television or radio.
  • Plug the computer into an outlet that is on a different circuit than the television or radio. (That is, make certain the computer and the radio or television are on circuits controlled by different circuit breakers or fuses.)
  • Consider installing a roof top television antenna with a coaxial cable lead-in between the antenna and television.

If necessary, consult you authorized Apple dealer or an experienced radio/television technician for additional suggestions.

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