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:
   Transmitter Emission type Applicable paragraphs (b)
   GMRS A1D, A3E, F1D, G1D, F3E, G3E with filtering (1), (3), (7).
      A1D, A3E, F1D, G1D, F3E, G3E without filtering (5), (6), (7).
      H1D, J1D, R1D, H3E, J3E, R3E (2), (4), (7).
   FRS F3E with filtering (1), (3), (7).
   R/C:
   27 MHz As specified in  Sec. 95.631(b) (1), (3), (7).
   72–76 MHz As specified in  Sec. 95.631(b) (1), (3), (7), (10), (11), (12).
   CB A1D, A3E (1), (3), (8), (9).
      H1D, J1D, R1D, H3E, J3E, R3E (2), (4), (8), (9).
      A1D, A3E type accepted before September 10, 1976 (1), (3), (7).
      H1D,J1D, R1D, H3E, J3E, R3E type accepted before September 10, 1986 (2),
   (4), (7).
   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:
   Frequency (MHz) Field strength ( µV/m) Measurement distance (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:
   Frequency Mask with audio low pass filter Mask without audio low 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]