§ 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 § 95.631(b) (1), (3), (7).
   72-76 MHz As specified in § 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).
   MedRadio As specified in paragraph (d).
   DSRCS-OBU As specified in paragraph (f) of this section.

   (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 log10 (fd/5) dB on any frequency removed from the center of
   the authorized bandwidth by a displacement frequency (fd in kHz), of more
   than 5 kHz up to and including 10 kHz.

   (6) At least 116 log10 (fd/6.1) dB, or if less, 50 + 10 log10 (T) dB, on any
   frequency  removed  from  the  center of the authorized bandwidth by a
   displacement frequency (fd in kHz), of more than 10 kHz up to and including
   250% of the authorized bandwidth.

   (7) At least 43 + 10 log10 (T) dB on any frequency removed from the center
   of the authorized bandwidth by more than 250%.

   (8) At least 53 + 10 log10 (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 log10 (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 (fd in kHz) of more than 2 kHz up to and including
   3.75 kHz: The lesser of 30 + 20(fd-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 MedRadio service, emissions
   shall be attenuated in accordance with the following:

   (1) Emissions from a MedRadio transmitter shall be attenuated to a level no
   greater than the field strength limits shown in the following table when
   they:

   (i) Are more than 250 kHz outside of the 402-405 MHz band (for devices
   designed to operate in the 402-405 MHz band);

   (ii) Are more than 100 kHz outside of either the 401-402 MHz or 405-406 MHz
   bands (for devices designed to operate in the 401-402 MHz or 405-406 MHz
   bands);

   (iii) Are in the 406.000-406.100 MHz band (for devices designed to operate
   in the 401-402 MHz or 405-406 MHz bands); or

   (iv) Are more than 2.5 MHz outside of the 413-419 MHz, 426-432 MHz, 438-444
   MHz, or 451-457 MHz bands (for devices designed to operate in the 413-457
   MHz band).
   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.

   (v) Are more than 2.5 MHz outside of the 2360-2400 MHz band (for devices
   designed to operate in the 2360-2400 MHz band).

   (2) The emission limits shown in the table of paragraph (d)(1) 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 § 95.605.

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

   (4) For devices designed to operate in the 402-405 MHz band: Emissions
   within the band more than 150 kHz away from the center frequency of the
   spectrum the transmission is intended to occupy and emissions 250 kHz or
   less  below 402 MHz or above 405 MHz band will be attenuated below the
   maximum permitted output power by at least 20 dB.

   (5) For devices designed to operate in the 401-402 MHz or 405-406 MHz bands:
   Emissions between 401-401.85 MHz or 405-406 MHz within the MedRadio bands
   that are more than 50 kHz away from the center frequency of the spectrum the
   transmission is intended to occupy (or more than 75 kHz away from the center
   frequency of MedRadio transmitters operating between 401.85-402 MHz) and
   emissions 100 kHz or less below 401 MHz or above 406 MHz shall be attenuated
   below the maximum permitted output power by at least 20 dB.

   (6) For devices designed to operate in the 413-419 MHz, 426-432 MHz, 438-444
   MHz, and 451-457 MHz bands: In the first 2.5 megahertz beyond any of the
   frequency bands authorized for MMN operation, the EIRP level associated with
   any unwanted emission must be attenuated within a 1 megahertz bandwidth by
   at least 20 dB relative to the maximum EIRP level within any 1 megahertz of
   the fundamental emission.

   (7) For devices designed to operate in the 2360-2400 MHz band: In the first
   2.5  megahertz  beyond  any of the frequency bands authorized for MBAN
   operation, the EIRP level associated with any unwanted emission must be
   attenuated within a 1 megahertz bandwidth by at least 20 dB relative to the
   maximum EIRP level within any 1 megahertz of the fundamental emission.

   (8) Compliance with the limits described in subparagraphs (4) through (6)
   are  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 fo 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 (fd in kHz) of more than 5.625 kHz but no more than
   12.5 kHz: at least 7.27(fd−2.88 kHz) dB.

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

   (ii) On any frequency removed from the center of the authorized bandwidth by
   a displacement frequency (fd in kHz) of more than 10 kHz, but not more than
   250 percent of the authorized bandwidth: at least 29 log (fd2/11) 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;  74 FR 22707 , May 14, 2009;
    77 FR 4269 , Jan. 27, 2012;  77 FR 55733 , Sept. 11, 2012]

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