|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.
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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 D_Unlicensed Personal Communications Service Devices
Sec. 15.319 General technical requirements.
(b) All transmissions must use only digital modulation techniques.
(c) Peak transmit power shall not exceed 100 microwatts multiplied
by the square root of the emission bandwidth in hertz. Peak transmit
power must be measured over any interval of continuous transmission
using instrumentation calibrated in terms of an rms-equivalent voltage.
The measurement results shall be properly adjusted for any instrument
limitations, such as detector response times, limited resolution
bandwidth capability when compared to the emission bandwidth,
sensitivity, etc., so as to obtain a true peak measurement for the
emission in question over the full bandwidth of the channel.
(d) Power spectral density shall not exceed 3 milliwatts in any 3
kHz bandwidth as measured with a spectrum analyzer having a resolution
bandwidth of 3 kHz.
(e) The peak transmit power shall be reduced by the amount in
decibels that the maximum directional gain of the antenna exceeds 3 dBi.
(f) The device shall automatically discontinue transmission in case
of either absence of information to transmit or operational failure. The
provisions in this section are not intended to preclude transmission of
control and signaling information or use of repetitive codes used by
certain digital technologies to complete frame or burst intervals.
(g) Notwithstanding other technical requirements specified in this
subpart, attenuation of emissions below the general emission limits in
Sec. 15.209 is not required.
(h) Where there is a transition between limits, the tighter limit
shall apply at the transition point.
(i) Unlicensed PCS devices are subject to the radiofrequency
radiation exposure requirements specified in Sec. Sec. 1.1307(b),
2.1091 and 2.1093 of this chapter, as appropriate. All equipment shall
be considered to operate in a ``general population/uncontrolled''
environment. Applications for equipment authorization of devices
operating under this section must contain a statement confirming
compliance with these requirements for both fundamental emissions and
unwanted emissions. Technical information showing the basis for this
statement must be submitted to the Commission upon request.
[58 FR 59180, Nov. 8, 1993, as amended at 59 FR 32852, June 24, 1994; 59
FR 40835, Aug. 10, 1994; 60 FR 13073, Mar. 10, 1995; 61 FR 41018, Aug.
7, 1996; 69 FR 62621, Oct. 27, 2004; 69 FR 77949, Dec. 29, 2004]