[Code of Federal Regulations]

[Title 47, Volume 2]

[Revised as of October 1, 2004]

From the U.S. Government Printing Office via GPO Access

[CITE: 47CFR23.15]



[Page 210-211]

 

                       TITLE 47--TELECOMMUNICATION

 

                    CHAPTER I--FEDERAL COMMUNICATIONS

                         COMMISSION (CONTINUED)

 

PART 23_INTERNATIONAL FIXED PUBLIC RADIOCOMMUNICATION SERVICES--Table 

of Contents

 

Sec. 23.15  Emission limitations.



    (a) For all transmitters placed into operation after September 19, 

1973, and for all transmitters after September 19, 1975, which operate 

on frequencies below 30 MHz:

    (1) The occupied bandwidth of emission shall be confined within the 

least possible spectrum space consistent with the state of the art and 

the required quality of transmission, and in no event shall be more than 

the authorized bandwidth.

    (2) Spurious emissions of transmitters of mean power of 50 kilowatts 

or less shall be attenuated at least 40 decibels below the mean power of 

the fundamental without exceeding the power of 50 milliwatts.

    (3) Spurious emissions of transmitters of mean power exceeding 50 

kilowatts shall be attenuated at least 60 decibels below the mean power 

of the fundamental and every effort should be made to keep the level of 

spurious emissions below the power of 50 milliwatts.

    (b) For all transmitters placed into operation after September 19, 

1973, and for all transmitters after September 19, 1975, which operate 

on frequencies above 30 MHz, the mean powers of emissions shall be 

attenuated below the mean output power of the transmitter in accordance 

with the following schedule:

    (1) On any frequency removed from the assigned frequency by more 

than 50 percent up to and including 100 percent of the authorized 

bandwidth: At least 25 decibels;

    (2) On any frequency removed from the assigned frequency by more 

than 100 percent up to and including 250 percent of the authorized 

bandwidth: at least 35 decibels;

    (3) On any frequency removed from the assigned frequency by more 

than



[[Page 211]]



250 percent of the authorized bandwidth: at least 43 plus 10 log (mean 

output power in watts) decibels, or 80 decibels, whichever is the lesser 

attenuation.

    (c) When an emission outside of the authorized bandwidth causes 

harmful interference, the Commission may, at its discretion, require 

greater attenuation than that specified in this section.



[38 FR 22479, Aug. 21, 1973; 38 FR 24901, Sept. 11, 1973]