Sec.  101.809   Bandwidth and emission limitations.

   (a) Stations in this service operating on frequencies in the 27.23–27.28 MHz
   band will be authorized to employ only amplitude modulated or frequency
   modulated emission for radiotelephony. The authorization to use such
   emissions will be construed to include authority to employ unmodulated
   emission only for temporary or short periods necessary for equipment testing
   incident to the construction and maintenance of the station.

   (b) Stations in the service operating on frequencies above 940 MHz may be
   authorized to use amplitude modulated, frequency modulated or pulse type of
   emission for radiotelephony and television. In addition, the use of
   unmodulated emission may be authorized in appropriate cases.

   (c) The maximum bandwidths which will normally be authorized for single
   channel operation on frequencies below 500 MHz in this service must not
   exceed the limits set forth below:


------------------------------------------------------------------------
                                                              Authorized
                      Type of emission                        bandwidth
                                                                (kHz)
------------------------------------------------------------------------
A3E........................................................            8
F3E or (G3E)...............................................           40
------------------------------------------------------------------------

   (d) Maximum bandwidths in the following frequency bands must not exceed the
   limits set forth below:

                           Maximum Authorized
------------------------------------------------------------------------
                                                              Bandwidth
                    Frequency band (MHz)                        (MHz)
------------------------------------------------------------------------
3,700 to 4,200.............................................       \1\ 20
5,925 to 6,425.............................................       \1\ 30
6,425 to 6,525.............................................           25
10,700 to 12,200...........................................     \1,2\ 40
13,200 to 13,250...........................................           25
21,200 to 23,600...........................................      \1\ 50
------------------------------------------------------------------------
\1\ The maximum bandwidth that will be authorized for each particular
  frequency in this band is detailed in the appropriate frequency table
  in  Sec.  101.147.
\2\ As of March 1, 2005, no new LTTS operators will be licensed in the
  11.7-12.2 GHz band. LTTS operators authorized prior to March 1, 2005
  may continue to operate in 11.7-12.2 GHz band until their license
  expires; no existing LTTS licensees will be renewed in the 11.7-12.2
  GHz band.

   (e) The bandwidths authorized on frequencies above 500 MHz must be
   appropriate to the type of operation in any particular case. An application
   requesting such authorization must fully describe the modulation, emission,
   and bandwidth desired and must specify the bandwidth to be occupied.

   [ 61 FR 26677 , May 28, 1996, as amended at  68 FR 4961 , Jan. 31, 2003;  70 FR 4788 , Jan. 31, 2005]