[Code of Federal Regulations]

[Title 47, Volume 2]

[Revised as of October 1, 2005]

From the U.S. Government Printing Office via GPO Access

[CITE: 47CFR22.359]



[Page 43-44]

 

                       TITLE 47--TELECOMMUNICATION

 

                         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.



[[Page 44]]



    (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]