FCC 15.215 Revised as of October 1, 2006
Goto Year:2005 |
2007
Sec. 15.215 Additional provisions to the general radiated emission limitations.
(a) The regulations in Sec. Sec. 15.217 through 15.257 provide alternatives to the
general radiated emission limits for intentional radiators operating in
specified frequency bands. Unless otherwise stated, there are no
restrictions as to the types of operation permitted under these sections.
(b) In most cases, unwanted emissions outside of the frequency bands shown
in these alternative provisions must be attenuated to the emission limits
shown in Sec. 15.209. In no case shall the level of the unwanted emissions from
an intentional radiator operating under these additional provisions exceed
the field strength of the fundamental emission.
(c) Intentional radiators operating under the alternative provisions to the
general emission limits, as contained in Sec. Sec. 15.217 through 15.257 and in
Subpart E of this part, must be designed to ensure that the 20 dB bandwidth
of the emission, or whatever bandwidth may otherwise be specified in the
specific rule section under which the equipment operates, is contained
within the frequency band designated in the rule section under which the
equipment is operated. The requirement to contain the designated bandwidth
of the emission within the specified frequency band includes the effects
from frequency sweeping, frequency hopping and other modulation techniques
that may be employed as well as the frequency stability of the transmitter
over expected variations in temperature and supply voltage. If a frequency
stability is not specified in the regulations, it is recommended that the
fundamental emission be kept within at least the central 80% of the
permitted band in order to minimize the possibility of out-of-band
operation.
[ 54 FR 17714 , Apr. 25, 1989, as amended at 62 FR 45333 , Aug. 27, 1997; 67 FR 34855 , May 16, 2002; 69 FR 3265 , Jan. 23, 2004; 70 FR 6774 , Feb. 9, 2005]
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