Sec.  74.661   Frequency tolerance.

   Stations in this service shall maintain the carrier frequency of each
   authorized transmitter to within the following percentage of the assigned
   frequency.


------------------------------------------------------------------------
                                                              Frequency
                   Frequency band  (MHz)                      tolerance
                                                                 (%)
------------------------------------------------------------------------
2,025 to 2,110.............................................    \1\ 0.005
2,450 to 2,483.5...........................................    \2\ 0.001
6,425 to 6,525.............................................        0.005
6,875 to 7,125.............................................    \1\ 0.005
12,700 to 13,250...........................................    \1\ 0.005
17,700 to 18,820...........................................        0.003
18,920 to 19,700...........................................       0.003
------------------------------------------------------------------------
\1\ Television translator relay stations shall maintain a frequency
  tolerance of 0.002%.
\2\ Stations licensed pursuant to an application filed before March 17,
  2005, for tolerance values exceeding those specified above, may
  continue to operate indefinitely in accordance with the terms of their
  current authorizations, subject to periodic renewal. Existing
  equipment and equipment of product lines in production before April
  16, 2003, authorized via certification or verification before March
  17, 2005, for tolerance values exceeding those specified above, may
  continue to be manufactured and/or marketed, but may not be authorized
  for use under station license except at stations licensed pursuant to
  an application filed before March 17, 2005. Any non-conforming
  equipment authorized under a station license, and replaced on or after
  March 17, 2005, must be replaced by conforming equipment.

   [ 52 FR 7143 , Mar. 9, 1987, as amended at  68 FR 12772 , Mar. 17, 2003]