|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. 15.225 Operation within the band 13.110-14.010 MHz.
(a) The field strength of any emissions within the band 13.553-
13.567 MHz shall not exceed 15,848 microvolts/meter at 30 meters.
(b) Within the bands 13.410-13.553 MHz and 13.567-13.710 MHz, the
field strength of any emissions shall not exceed 334 microvolts/meter at
(c) Within the bands 13.110-13.410 MHz and 13.710-14.010 MHz the
field strength of any emissions shall not exceed 106 microvolts/meter at
(d) The field strength of any emissions appearing outside of the
13.110-14.010 MHz band shall not exceed the general radiated emission
limits in Sec. 15.209.
(e) 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.
(f) In the case of radio frequency powered tags designed to operate
with a device authorized under this section, the tag may be approved
with the device or be considered as a separate device subject to its own
authorization. Powered tags approved with a device under a single
application shall be labeled with the same identification number as the
[68 FR 68546, Dec. 9, 2003]