Yamaha RX21 - Manual (Page 60)

FCC INFORMATION (USA)
While the following statements are provided to comply with
FCC Regulations in the United States, the corrective measures
listed below are applicable worldwide.
This series of Yamaha professional music equipment uses
frequencies that appear in the radio frequency range and if in-
stalled in the immediate proximity of some types of audio or video
devices (within three meters), interference may occur.
This series of Yamaha professional music equipment has been
type tested and found the comply with the specifications set for
a class B computing device in accordance with those specifica-
tions listed in subpart J of part 15 of the FCC rules. Those rules
are designed to provide a reasonable measure of protection
against such interference.
However, this does not guaranteethat interference will not occur.
If your professional music equipment should be suspected of
causing interference with other electronic devices, verification
can be made by turning your professional music equipment off
and on. If the interference continues when your equipment is off,
the equipment is not the source of interference. If your equipment
does appear to be the source of the interference, you should try
to correct the situation by using one or more of the following
measures:
Relocate either the equipment or the electronic device that is
being affected by the interference.
Utilize power for the professional music equipment and the
device being affected that are on different branch (circuit breaker
of fuse) circuits, of install AC line filters.
In the case of radio or TV interference, relocate the antenna
or, if the antenna lead-in is 300 ohm ribbon lead, changethe lead-in
to co-axial type cable.
If these corrective measures do not produce satisfactory re-
suits, please contact your authorized Yamaha professional pro-
ducts dealer for suggestions and/or corrective measures. If you
can not locate a authorized Yamaha professional products dealer
in your general area contact the professional music Service De-
partment, Yamaha International, 6600 Orangethorpe Ave., Buena
park, CA90620, USA.
If for any reason, you should need additional information re-
lating to radio or TV interference, you may find a booklet prepard
by the Federal Communications Commission helpful: “How to
Identify and Resolve Radio-TV Interference Problems". This
booklet is available from the U.S. Government Printing Office,
Washington D.C.
20402-Stock No. 004-000-00345-4.