|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
CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION
PART 15_RADIO FREQUENCY DEVICES--Table of Contents
Subpart C_Intentional Radiators
Sec. 15.237 Operation in the bands 72.0-73.0 MHz, 74.6-74.8 MHz
and 75.2-76.0 MHz.
(a) The intentional radiator shall be restricted to use as an
auditory assistance device.
(b) Emissions from the intentional radiator shall be confined within
a band 200 kHz wide centered on the operating frequency. The 200 kHz
band shall lie wholly within the above specified frequency ranges.
(c) The field strength of any emissions within the permitted 200 kHz
band shall not exceed 80 millivolts/meter at 3 meters. The field
strength of any emissions radiated on any frequency outside of the
specified 200 kHz band shall not exceed 1500 microvolts/meter at 3
meters. The emission limits in this paragraph are based on measurement
an average detector. The provisions in Sec. 15.35 for limiting peak
[54 FR 17714, Apr. 25, 1989, as amended at 57 FR 13048, Apr. 15, 1992]