§  80.211   Emission limitations.

   The emissions must be attenuated according to the following schedule.

   (a) The mean power when using emissions H3E, J3E and R3E:

   (1) On any frequency removed from the assigned frequency by more than
   50 percent up to and including 150 percent of the authorized bandwidth:

   at least 25 dB for transmitters installed before February 1, 1992,

   at least 28 dB for transmitters installed on or after February 1, 1992;

   (2) On any frequency removed from the assigned frequency by more than
   150 percent up to and including 250 percent of the authorized
   bandwidth: At least 35 dB; and

   (3) On any frequency removed from the assigned frequency by more than
   250 percent of the authorized bandwidth: At least 43 plus 10log10 (mean
   power in watts) dB.

   (b) For transmitters operating in the band 1626.5-1646.5 MHz. In any 4
   kHz band the mean power of emissions shall be attenuated below the mean
   output power of the transmitter as follows:

   (1) Where the center frequency is removed from the assigned frequency
   by more than 50 percent up to and including 100 percent of the
   authorized bandwidth: At least 25 dB;

   (2) Where the center frequency is removed from the assigned frequency
   by more than 100 percent up to 250 percent of the authorized bandwidth:
   At least 35 dB; and

   (3) On any frequency removed from the assigned frequency by more than
   250 percent of the authorized bandwidth: At least 43 plus 10log10 (mean
   power in watts) dB.

   (c) In any 4 kHz band the peak power of spurious emissions and noise at
   the input to the transmit antenna must be attenuated below the peak
   output power of the station as follows:

   (1) 125 dB at 1525.0 MHz, increasing linearly to 90 dB at 1612.5 MHz;

   (2) 90 dB at 1612.5 MHz increasing linearly to 60 dB at 1624.0 MHz;

   (3) 90 dB from 1624.0 MHz to 1650.0 MHz, except at frequencies near the
   transmitted carrier where the requirements of paragraphs (b)(1) through
   (3) of this section, apply;

   (4) 60 dB at 1650.0 MHz decreasing linearly to 90 dB at 1662.5 MHz;

   (5) 90 dB at 1662.5 MHz decreasing linearly to 125 dB at 1752.5 MHz;
   and

   (6) 125 dB outside above range, except for harmonics which must comply
   with (b)(3) of this section.

   (d) The mean power of emissions from radiotelephone survival craft
   transmitters, 9 GHz search and rescue transponders, and radiotelegraph
   survival craft transmitters must be attenuated below the mean output
   power of the transmitter as follows:

   (1) On any frequency removed from the assigned frequency by more than
   50 percent, up to and including 100 percent of the authorized
   bandwidth: at least 25 dB;

   (2) On any frequency removed from the assigned frequency by more than
   100 percent of the authorized bandwidth: at least 30 dB.

   (e) The mean power of EPIRBs operating on 121.500 MHz, 243.000 MHz and
   406.0-406.1 MHz must be as follows:

   (1) On any frequency removed from the assigned frequency by more than
   50 percent, up to and including 100 percent of the authorized
   bandwidth: At least 25 dB;

   (2) On any frequency removed from the assigned frequency by more than
   100 percent: at least 30 dB.

   (f) The mean power when using emissions other than those in paragraphs
   (a), (b), (c) and (d) of this section:

   (1) On any frequency removed from the assigned frequency by more than
   50 percent up to and including 100 percent of the authorized bandwidth:
   At least 25 dB;

   (2) On any frequency removed from the assigned frequency by more than
   100 percent up to and including 250 percent of the authorized
   bandwidth: At least 35 dB; and

   (3) On any frequency removed from the assigned frequency by more than
   250 percent of the authorized bandwidth: At least 43 plus 10log10 (mean
   power in watts) dB.

   [ 51 FR 31213 , Sept. 2, 1986, as amended at  54 FR 40058 , Sept. 29, 1989;
    54 FR 49994 , Dec. 4, 1989;  56 FR 11516 , Mar. 19, 1991;  62 FR 40306 ,
   July 28, 1997;  73 FR 4482 , Jan. 25, 2008;  78 FR 25175 , Apr. 29, 2013]

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