[Code of Federal Regulations]
[Title 47, Volume 1]
[Revised as of October 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 47CFR15.215]

[Page 743]
 
                       TITLE 47--TELECOMMUNICATION
 
              CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION
 
PART 15--RADIO FREQUENCY DEVICES--Table of Contents
 
                    Subpart C--Intentional Radiators
 
Sec. 15.215  Additional provisions to the general radiated emission limitations.

    (a) The regulations in Secs. 15.217 through 15.255 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 Secs. 15.217 through 
15.255 and in subpart E of this part, must be designed to ensure that 
the 20 dB bandwidth of the emission is contained within the frequency 
band designated in the rule section under which the equipment is 
operated. The requirement to contain the 20 dB 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]