Sec.  95.635   Unwanted radiation.

   (a) In addition to the procedures in part 2, the following requirements
   apply to each transmitter both with and without the connection of all
   attachments acceptable for use with the transmitter, such as an external
   speaker, microphone, power cord, antenna, etc.

   (b) The power of each unwanted emission shall be less than TP as specified
   in the applicable paragraphs listed in the following table:


------------------------------------------------------------------------
                                                           Applicable
          Transmitter                Emission type       paragraphs (b)
------------------------------------------------------------------------
GMRS..........................  A1D, A3E, F1D, G1D,     (1), (3), (7).
                                 F3E, G3E with
                                 filtering.
                                A1D, A3E, F1D, G1D,     (5), (6), (7).
                                 F3E, G3E without
                                 filtering.
                                H1D, J1D, R1D, H3E,     (2), (4), (7).
                                 J3E, R3E.
FRS...........................  F3E with filtering....  (1), (3), (7).
R/C:
    27 MHz....................  As specified in  Sec.   (1), (3), (7).
                                 95.631(b).
    72-76 MHz.................  As specified in  Sec.   (1), (3), (7),
                                 95.631(b).              (10), (11),
                                                         (12).
CB............................  A1D, A3E..............  (1), (3), (8),
                                                         (9).
                                H1D, J1D, R1D, H3E,     (2), (4), (8),
                                 J3E, R3E.               (9).
                                A1D, A3E type accepted  (1), (3), (7).
                                 before September 10,
                                 1976.
                                H1D,J1D, R1D, H3E,      (2), (4), (7).
                                 J3E, R3E type
                                 accepted before
                                 September 10, 1986.
LPRS..........................  As specified in         ................
                                 paragraph (c)..
MICS..........................  As specified in         ................
                                 paragraph (d)..
DSRCS-OBU.....................  As specified in
                                 paragraph (f) of this
                                 section..
------------------------------------------------------------------------
Note 1_Filtering noted for GMRS and FRS transmitters refers to the
  requirement in  Sec.  95.637(b).
Note 2_Unwanted R radiation may be stated in mean power or in peak
  envelope power, provided it is stated in the same parameter as T.
Note 3_Paragraphs (b)(1), (b)(10), (b)(11), and (b)(12) of this section
  apply to transmitters operating in the 72-76 MHz band that are
  manufactured or imported into the United States on or after March 1,
  1992, or marketed or sold on or after March 1, 1993. Paragraphs
  (b)(1), (b)(3), and (b)(7) of this section apply to transmitters
  operating in the 72-76 MHz band manufactured or imported into the
  United States before March 1, 1992, or marketed before March 1, 1993.
Note 4_If spurious or harmonic emissions result in harmful interference
  (any transmission, radiation or induction that endangers the
  functioning of a radionavigation or other safety service or seriously
  degrades, obstructs or repeatedly interrupts a radiocommunication
  service operating in accordance with applicable laws, treaties and
  regulations), the FCC may, at its discretion, require appropriate
  technical changes in the station equipment to alleviate the
  interference, including the use of a low pass filter between the
  transmitter antenna terminals and the antenna feed line.

   (1) At least 25 dB (decibels) on any frequency removed from the center of
   the authorized bandwidth by more than 50% up to and including 100% of the
   authorized bandwidth.

   (2) At least 25 dB on any frequency removed from the center of the
   authorized bandwidth by more than 50% up to and including 150% of the
   authorized bandwidth.

   (3) At least 35 dB on any frequency removed from the center of the
   authorized bandwidth by more than 100% up to and including 250% of the
   authorized bandwidth.

   (4) At least 35 dB on any frequency removed from the center of the
   authorized bandwidth by more than 150% up to and including 250% of the
   authorized bandwidth.

   (5) At least 83 log[10] (f[d]/5) dB on any frequency removed from the center
   of the authorized bandwidth by a displacement frequency (f[d] in kHz), of
   more than 5 kHz up to and including 10 kHz.

   (6) At least 116 log[10] (f[d]/6.1) dB, or if less, 50 + 10 log[10] (T) dB,
   on any frequency removed from the center of the authorized bandwidth by a
   displacement frequency (f[d] in kHz), of more than 10 kHz up to and
   including 250% of the authorized bandwidth.

   (7) At least 43 + 10 log[10] (T) dB on any frequency removed from the center
   of the authorized bandwidth by more than 250%.

   (8) At least 53 + 10 log[10] (T) dB on any frequency removed from the center
   of the authorized bandwidth by more than 250%.

   (9) At least 60 dB on any frequency twice or greater than twice the
   fundamental frequency.

   (10) At least 45 dB on any frequency removed from the center of the
   authorized bandwidth by more than 100% up to and including 125% of the
   authorized bandwidth.

   (11) At least 55 dB on any frequency removed from the center of the
   authorized bandwidth by more than 125% up to and including 250% of the
   authorized bandwidth.

   (12) At least 56 + 10 log[10] (T) dB on any frequency removed from the
   center of the authorized bandwidth by more than 250%.

   (c) For transmitters designed to operate in the LPRS, emissions shall be
   attenuated in accordance with the following:

   (1) Emissions for LPRS transmitters operating on standard band channels (25
   kHz) shall be attenuated below the unmodulated carrier in accordance with
   the following:

   (i) Emissions 12.5 kHz to 22.5 kHz away from the channel center frequency:
   at least 30 dB; and

   (ii) Emissions more than 22.5 kHz away from the channel center frequency: at
   least 43 + 10log(carrier power in watts) dB.

   (2) Emissions for LPRS transmitters operating on extra band channels (50
   kHz) shall be attenuated below the unmodulated carrier in accordance with
   the following:

   (i) Emissions 25 kHz to 35 kHz from the channel center frequency: at least
   30 dB; and

   (ii) Emissions more than 35 kHz away from the channel center frequency: at
   least 43 + 10log(carrier power in watts) dB.

   (3) Emissions for LPRS transmitters operating on narrowband channels (5 kHz)
   shall be attenuated below the power (P) of the highest emission, measured in
   peak values, contained within the authorized bandwidth (4 kHz) in accordance
   with the following:

   (i) On any frequency within the authorized bandwidth: Zero dB;

   (ii) On any frequency removed from the center of the authorized bandwidth by
   a displacement frequency (f[d] in kHz) of more than 2 kHz up to and
   including 3.75 kHz: The lesser of 30 + 20(f[d]-2) dB, or 55 + 10 log(P), or
   65 dB; and

   (iii) On any frequency beyond 3.75 kHz removed from the center of the
   authorized bandwidth: At least 55 + 10 log(P) dB.

   (4) Emissions from AMTS transmitters using a single 250 kHz channel shall be
   attenuated below the unmodulated carrier in accordance with the following:

   (i) Emissions from 125 kHz to 135 kHz away from the channel center
   frequency; at least 30 dB; and

   (ii) Emissions more than 135 kHz away from the channel center frequency; at
   least 43 + 10log(carrier power in watts) dB.

   (d) For transmitters designed to operate in the MICS, emissions shall be
   attenuated in accordance with the following:

   (1) Emissions more than 250 kHz outside of the MICS band (402–405 MHz) shall
   be attenuated to a level no greater than the following field strength
   limits:


------------------------------------------------------------------------
                                                   Field
                                                  strength   Measurement
                Frequency (MHz)                  ( µV/    distance
                                                     m)          (m)
------------------------------------------------------------------------
30-88.........................................          100            3
88-216........................................          150            3
216-960.......................................          200            3
960 and above.................................          500            3
------------------------------------------------------------------------
Note_At band edges, the tighter limit applies.

   (2) The emission limits shown in the above table are based on measurements
   employing a CISPR quasi-peak detector except that above 1 GHz, the limit is
   based on measurements employing an average detector. Measurements above 1
   GHz shall be performed using a minimum resolution bandwidth of 1 MHz. See
   also  Sec. 95.605.

   (3) The emissions from a MICS transmitter must be measured to at least the
   tenth harmonic of the highest fundamental frequency designed to be emitted
   by the transmitter.

   (4) Emissions within the MICS band (402–405 MHz) more than 150 kHz away from
   the center frequency of the spectrum the transmission is intended to occupy,
   will be attenuated below the transmitter output power by at least 20 dB.
   Compliance with this limit is based on the use of measurement
   instrumentation employing a peak detector function with an instrument
   resolution bandwidth approximately equal to 1.0 percent of the emission
   bandwidth of the device under measurement.

   (5) Emissions 250 kHz or less that are above and below the MICS band
   (402–405 MHz) will be attenuated below the maximum permitted output power by
   at least 20 dB. Compliance with this limit is based on the use of
   measurement instrumentation employing a peak detector function with an
   instrument resolution bandwidth approximately equal to 1.0 percent of the
   emission bandwidth of the device under measurement.

   (e) For transmitters designed to operate in the MURS, transmitters shall
   comply with the following:


------------------------------------------------------------------------
                                                Mask with   Mask without
                  Frequency                     audio low     audio low
                                               pass filter   pass filter
------------------------------------------------------------------------
151.820 MHz, 151.880 MHz and 151.940 MHz....          (1)           (1)
154.570 MHz and 154.600 MHz.................          (2)           (3)
------------------------------------------------------------------------

   (1) Emission Mask 1—For transmitters designed to operate with a 12.5 kHz
   channel bandwidth, any emission must be attenuated below the power (P) of
   the highest emission contained within the authorized bandwidth as follows:

   (i) On any frequency from the center of the authorized bandwidth f[o] to
   5.625 kHz removed from fo: Zero dB.

   (ii) On any frequency removed from the center of the authorized bandwidth by
   a displacement frequency (f[d] in kHz) of more than 5.625 kHz but no more
   than 12.5 kHz: at least 7.27(f[d]−2.88 kHz) dB.

   (iii) On any frequency removed from the center of the authorized bandwidth
   by a displacement frequency (f[d] in kHz) of more than 12.5 kHz: at least 50
   + 10 log (P) dB or 70 dB, whichever is the lesser attenuation.

   (2) Emission Mask 2—For transmitters designed to operate with a 25 kHz
   channel bandwidth that are equipped with an audio low-pass filter, the power
   of any emission must be below the unmodulated carrier power (P) as follows:

   (i) On any frequency removed from the assigned frequency by more than 50
   percent, but not more than 100 percent of the authorized bandwidth: at least
   25 dB.

   (ii) On any frequency removed from the assigned frequency by more than 100
   percent, but not more than 250 percent of the authorized bandwidth: at least
   35 dB.

   (iii) On any frequency removed from the assigned frequency by more than 250
   percent of the authorized bandwidth: at least 43 + 10 log (P) dB.

   (3) Emission Mask 3—For transmitters designed to operate with a 25 kHz
   channel bandwidth that are not equipped with an audio low-pass filter, the
   power of any emission must be attenuated below the unmodulated carrier
   output power (P) as follows:

   (i) On any frequency removed from the center of the authorized bandwidth by
   a displacement frequency (f[d] in kHz) of more than 5 kHz, but not more than
   10 kHz: at least 83 log (f[d]/5) dB.

   (ii) On any frequency removed from the center of the authorized bandwidth by
   a displacement frequency (f[d] in kHz) of more than 10 kHz, but not more
   than 250 percent of the authorized bandwidth: at least 29 log (f[d] ^2 /11)
   dB or 50 dB, whichever is the lesser attenuation.

   (iii) On any frequency removed from the center of the authorized bandwidth
   by more than 250 percent of the authorized bandwidth: at least 43 + 10 log
   (P) dB.

   (f) DSRCS-OBUs are governed under subpart L of this part.

   [ 53 FR 36789 , Sept. 22, 1988, as amended at  56 FR 15837 , Apr. 18, 1991.
   Redesignated and amended at  61 FR 28769 , 28770, June 6, 1996, and further
   redesignated and amended at  61 FR 46567 , 46568, Sept. 4, 1996;  63 FR 36610 ,
   July 7, 1998;  64 FR 69931 , Dec. 15, 1999;  65 FR 60878 , Oct. 13, 2000;  67 FR 63289 , Oct. 11, 2002;  69 FR 46446 , Aug. 3, 2004]