[Code of Federal Regulations]
[Title 47, Volume 2]
[Revised as of October 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 47CFR22.359]

[Page 43]
 
                       TITLE 47--TELECOMMUNICATION
 
        CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION (CONTINUED)
 
PART 22_PUBLIC MOBILE SERVICES--Table of Contents
 
            Subpart C_Operational and Technical Requirements
 
Sec.  22.359  Emission limitations.

    The rules in this section govern the spectral characteristics of 
emissions in the Public Mobile Services, except for the Air-Ground 
Radiotelephone Service (see Sec.  22.861, instead) and the Cellular 
Radiotelephone Service (see Sec.  22.917, instead).
    (a) Out of band emissions. The power of any emission outside of the 
authorized operating frequency ranges must be attenuated below the 
transmitting power (P) by a factor of at least 43 + 10 log (P) dB.
    (b) Measurement procedure. Compliance with these rules is based on 
the use of measurement instrumentation employing a resolution bandwidth 
of 30 kHz or more. In the 60 kHz bands immediately outside and adjacent 
to the authorized frequency range or channel, a resolution bandwidth of 
at least one percent of the emission bandwidth of the fundamental 
emission of the transmitter may be employed. A narrower resolution 
bandwidth is permitted in all cases to improve measurement accuracy 
provided the measured power is integrated over the full required 
measurement bandwidth (i.e., 30 kHz or 1 percent of emission bandwidth, 
as specified). The emission bandwidth is defined as the width of the 
signal between two points, one below the carrier center frequency and 
one above the carrier center frequency, outside of which all emissions 
are attenuated at least 26 dB below the transmitter power.
    (c) Alternative out of band emission limit. Licensees in the Public 
Mobile Services may establish an alternative out of band emission limit 
to be used at specified frequencies (band edges) in specified 
geographical areas, in lieu of that set forth in this section, pursuant 
to a private contractual arrangement of all affected licensees and 
applicants. In this event, each party to such contract shall maintain a 
copy of the contract in their station files and disclose it to 
prospective assignees or transferees and, upon request, to the FCC.
    (d) Interference caused by out of band emissions. If any emission 
from a transmitter operating in any of the Public Mobile Services 
results in interference to users of another radio service, the FCC may 
require a greater attenuation of that emission than specified in this 
section.

[70 FR 19308, Apr. 13, 2005]

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