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FCC Part 15 Radio Frequency Devices
Section 15.319

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: 47CFR15.319]
[Page 832-833]
                       TITLE 47--TELECOMMUNICATION
      Subpart D_Unlicensed Personal Communications Service Devices
Sec. 15.319  General technical requirements.
    (a) [Reserved]
    (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.
[[Page 833]]
    (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]

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