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Copyright 1999-2015

FCC Part 15 Radio Frequency Devices
Section 15.225

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: 47CFR15.225]
[Page 810-811]
                       TITLE 47--TELECOMMUNICATION
                     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 
30 meters.
    (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 
30 meters.
    (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
[[Page 811]]
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]

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