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|The Federal Communications Commission (FCC) is the authority
in the United States of America that creates and enforces the use of airwaves throughout the entire
radio frequency spectrum. This group of documents contains the entirety of the
FCC Part 15 regulations
that concern unlicensed radio frequency devices. As with all government documents, this material
is in the public domain and may be freely copied so long as the content is not changed. This copy
is provided as a convenience for RF Cafe visitors.
Click here for the Table of Contents.
[Code of Federal Regulations] [Title 47, Volume 1] [Revised as of October 1, 2008] From the U.S. Government Printing Office via GPO Access [CITE: 47CFR15.229]
CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION
PART 15_RADIO FREQUENCY DEVICES--Table of Contents
Subpart C_Intentional Radiators
Sec. 15.229 Operation within the band 40.66-40.70 MHz.
(a) Unless operating pursuant to the provisions in Sec. 15.231, the field strength of any emissions within this band shall not exceed 1,000 microvolts/meter at 3 meters. (b) As an alternative to the limit in paragraph (a) of this section, perimeter protection systems may demonstrate compliance with the following: the field strength of any emissions within this band shall not exceed 500 microvolts/meter at 3 meters, as determined using measurement instrumentations employing an average detector. The provisions in Sec. 15.35 for limiting peak emissions apply where compliance of these devices is demonstrated under this alternative emission limit. (c) The field strength of any emissions appearing outside of this band shall not exceed the general radiated emission limits in Sec. 15.209. (d) The frequency tolerance of the carrier signal shall be maintained within 0.01% of the operating frequency over a temperature variation of -20 degrees to +50 degrees C at normal supply voltage, and for a variation in the primary supply voltage from 85% to 115% of the rated supply voltage at a temperature of 20 degrees C. For battery operated equipment, the equipment tests shall be performed using a new battery.
[54 FR 17714, Apr. 25, 1989, as amended at 55 FR 33910, Aug. 20, 1990]