[Code of Federal Regulations]

[Title 47, Volume 1]

[Revised as of October 1, 2005]

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

[CITE: 47CFR15.221]



[Page 819-820]

 

                       TITLE 47--TELECOMMUNICATION

 

              CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION

 

PART 15_RADIO FREQUENCY DEVICES--Table of Contents

 

                     Subpart C_Intentional Radiators

 

Sec. 15.221  Operation in the band 525-1705 kHz.



    (a) Carrier current systems and transmitters employing a leaky 

coaxial cable as the radiating antenna may operate in the band 525-1705 

kHz provided the field strength levels of the radiated emissions do not 

exceed 15 uV/m, as measured at a distance of 47,715/(frequency in kHz) 

meters (equivalent to Lambda/2Pi) from the electric power line or the 

coaxial cable, respectively. The field strength levels of emissions 

outside this band shall not exceed the



[[Page 820]]



general radiated emission limits in Sec. 15.209.

    (b) As an alternative to the provisions in paragraph (a) of this 

section, intentional radiators used for the operation of an AM broadcast 

station on a college or university campus or on the campus of any other 

education institution may comply with the following:

    (1) On the campus, the field strength of emissions appearing outside 

of this frequency band shall not exceed the general radiated emission 

limits shown in Sec. 15.209 as measured from the radiating source. 

There is no limit on the field strength of emissions appearing within 

this frequency band, except that the provisions of Sec. 15.5 continue 

to comply.

    (2) At the perimeter of the campus, the field strength of any 

emissions, including those within the frequency band 525-1705 kHz, shall 

not exceed the general radiated emission in Sec. 15.209.

    (3) The conducted limits specified in Sec. 15.207 apply to the 

radio frequency voltage on the public utility power lines outside of the 

campus. Due to the large number of radio frequency devices which may be 

used on the campus, contributing to the conducted emissions, as an 

alternative to measuring conducted emissions outside of the campus, it 

is acceptable to demonstrate compliance with this provision by measuring 

each individual intentional radiator employed in the system at the point 

where it connects to the AC power lines.

    (c) A grant of equipment authorization is not required for 

intentional radiators operated under the provisions of this section. In 

lieu thereof, the intentional radiator shall be verified for compliance 

with the regulations in accordance with subpart J of part 2 of this 

chapter. This data shall be kept on file at the location of the studio, 

office or control room associated with the transmitting equipment. In 

some cases, this may correspond to the location of the transmitting 

equipment.

    (d) For the band 535-1705 kHz, the frequency of operation shall be 

chosen such that operation is not within the protected field strength 

contours of licensed AM stations.



[56 FR 373, Jan. 4, 1991]