[Code of Federal Regulations]

[Title 47, Volume 1]

[Revised as of October 1, 2006]

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

[CITE: 47CFR2.101]



[Page 538-539]

 

                       TITLE 47--TELECOMMUNICATION

 

              CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION

 

PART 2_FREQUENCY ALLOCATIONS AND RADIO TREATY MATTERS; GENERAL RULES AND 

REGULATIONS--Table of Contents

 

     Subpart B_Allocation, Assignment, and Use of Radio Frequencies

 

Sec.  2.101  Frequency and wavelength bands.



    (a) The radio spectrum shall be subdivided into nine frequency 

bands, which shall be designated by progressive whole numbers in 

accordance with the following table. As the unit of frequency is the 

hertz (Hz), frequencies shall be expressed:

    (1) In kilohertz (kHz), up to and including 3 000 kHz;

    (2) In megahertz (MHz), above 3 MHz, up to and including 3 000 MHz;

    (3) In gigahertz (GHz), above 3 GHz, up to and including 3 000 GHz.

    (b) However, where adherence to these provisions would introduce 

serious difficulties, for example in connection with the notification 

and registration of frequencies, the lists of frequencies and related 

matters, reasonable departures may be made.



----------------------------------------------------------------------------------------------------------------

                                                        Frequency range

                                                         (lower limit        Corresponding          Metric

          Band  number                  Symbols        exclusive, upper   metric subdivision  abbreviations  for

                                                       limit inclusive)                            the bands

----------------------------------------------------------------------------------------------------------------

4...............................  VLF...............  3 to 30 kHz.......  Myriametric waves.  B.Mam



[[Page 539]]





5...............................  LF................  30 to 300 kHz.....  Kilometric waves..  B.km

6...............................  MF................  300 to 3 000 kHz..  Hectometric waves.  B.hm

7...............................  HF................  3 to 30 MHz.......  Decametric waves..  B.dam

8...............................  VHF...............  30 to 300 MHz.....  Metric waves......  B.m

9...............................  UHF...............  300 to 3 000 MHz..  Decimetric waves..  B.dm

10..............................  SHF...............  3 to 30 GHz.......  Centimetric waves.  B.cm

11..............................  EHF...............  30 to 300 GHz.....  Millimetric waves.  B.mm

12..............................  ..................  300 to 3 000 GHz..  Decimillimetric     ..................

                                                                           waves.

----------------------------------------------------------------------------------------------------------------

Note 1: ``Band N'' (N = band number) extends from 0.3 x 10\N\ Hz to 3 x 10\N\ Hz.

Note 2: Prefix: k = kilo (10\3\), M = mega (10\6\), G = giga (10\9\).



    (c) In communications between administrations and the ITU, no names, 

symbols or abbreviations should be used for the various frequency bands 

other than those specified in this section.



[70 FR 46583, Aug. 10, 2005; 70 FR 53074, Sept. 7, 2005]