§ 15.205   Restricted bands of operation.

   (a)  Except  as  shown in paragraph (d) of this section, only spurious
   emissions are permitted in any of the frequency bands listed below:
          MHz                MHz              MHz          GHz
   0.090-0.110              16.42-16.423     399.9-410    4.5-5.15
   ^10.495-0.505       16.69475-16.69525       608-614   5.35-5.46
   2.1735-2.1905       16.80425-16.80475      960-1240   7.25-7.75
   4.125-4.128                25.5-25.67     1300-1427   8.025-8.5
   4.17725-4.17775            37.5-38.25   1435-1626.5     9.0-9.2
   4.20725-4.20775               73-74.6 1645.5-1646.5     9.3-9.5
   6.215-6.218                 74.8-75.2     1660-1710   10.6-12.7
   6.26775-6.26825            108-121.94 1718.8-1722.2  13.25-13.4
   6.31175-6.31225               123-138     2200-2300  14.47-14.5
   8.291-8.294              149.9-150.05     2310-2390  15.35-16.2
   8.362-8.366       156.52475-156.52525   2483.5-2500   17.7-21.4
   8.37625-8.38675           156.7-156.9     2690-2900 22.01-23.12
   8.41425-8.41475       162.0125-167.17     3260-3267   23.6-24.0
   12.29-12.293             167.72-173.2     3332-3339   31.2-31.8
   12.51975-12.52025             240-285   3345.8-3358  36.43-36.5
   12.57675-12.57725           322-335.4     3600-4400        (^2)
   13.36-13.41                                        

   ^1Until February 1, 1999, this restricted band shall be 0.490-0.510 MHz.

   ^2Above 38.6

   (b) Except as provided in paragraphs (d) and (e) of this section, the field
   strength of emissions appearing within these frequency bands shall not
   exceed the limits shown in § 15.209. At frequencies equal to or less than
   1000 MHz, compliance with the limits in § 15.209 shall be demonstrated using
   measurement instrumentation employing a CISPR quasi-peak detector. Above
   1000  MHz,  compliance  with  the  emission limits in § 15.209 shall be
   demonstrated based on the average value of the measured emissions. The
   provisions in § 15.35 apply to these measurements.

   (c) Except as provided in paragraphs (d) and (e) of this section, regardless
   of  the field strength limits specified elsewhere in this subpart, the
   provisions of this section apply to emissions from any intentional radiator.

   (d) The following devices are exempt from the requirements of this section:

   (1) Swept frequency field disturbance sensors operating between 1.705 and 37
   MHz  provided  their  emissions only sweep through the bands listed in
   paragraph  (a)  of  this  section, the sweep is never stopped with the
   fundamental  emission within the bands listed in paragraph (a) of this
   section, and the fundamental emission is outside of the bands listed in
   paragraph  (a) of this section more than 99% of the time the device is
   actively transmitting, without compensation for duty cycle.

   (2) Transmitters used to detect buried electronic markers at 101.4 kHz which
   are employed by telephone companies.

   (3) Cable locating equipment operated pursuant to § 15.213.

   (4) Any equipment operated under the provisions of § 15.253, 15.255, and
   15.256 in the frequency band 75-85 GHz, or § 15.257 of this part.

   (5) Biomedical telemetry devices operating under the provisions of § 15.242
   of this part are not subject to the restricted band 608-614 MHz but are
   subject to compliance within the other restricted bands.

   (6) Transmitters operating under the provisions of subparts D or F of this
   part.

   (7) Devices operated pursuant to § 15.225 are exempt from complying with this
   section for the 13.36-13.41 MHz band only.

   (8) Devices operated in the 24.075-24.175 GHz band under § 15.245 are exempt
   from complying with the requirements of this section for the 48.15-48.35 GHz
   and 72.225-72.525 GHz bands only, and shall not exceed the limits specified
   in § 15.245(b).

   (9) Devices operated in the 24.0-24.25 GHz band under § 15.249 are exempt
   from complying with the requirements of this section for the 48.0-48.5 GHz
   and 72.0-72.75 GHz bands only, and shall not exceed the limits specified in
   § 15.249(a).

   (e) Harmonic emissions appearing in the restricted bands above 17.7 GHz from
   field disturbance sensors operating under the provisions of § 15.245 shall
   not exceed the limits specified in § 15.245(b).

   [ 54 FR 17714 , Apr. 25, 1989, as amended at  55 FR 46791 , Nov. 7, 1990;  56 FR 6288 , Feb. 15, 1991;  57 FR 13048 , Apr. 15, 1992;  58 FR 33774 , June 21, 1993;
    60 FR 28068 , May 30, 1995;  61 FR 14503 , Apr. 2, 1996;  62 FR 4655 , Jan. 31,
   1997;  62 FR 58658 , Oct. 30, 1997;  67 FR 34855 , May 16, 2002;  68 FR 68546 ,
   Dec. 9, 2003;  69 FR 3265 , Jan. 23, 2004;  69 FR 72031 , Dec. 10, 2004;  79 FR 12678 , Mar. 6, 2014]

   return arrow Back to Top