§ 15.257   Operation within the band 92-95 GHz.

   (a) Operation of devices under the provisions of this section is limited to
   indoor use;

   (1) Devices operating under the provisions of this section, by the nature of
   their design, must be capable of operation only indoors. The necessity to
   operate with a fixed indoor infrastructure, e.g., a transmitter that must be
   connected to the AC power lines, may be considered sufficient to demonstrate
   this.

   (2) The use of outdoor mounted antennas, e.g., antennas mounted on the
   outside  of  a  building or on a telephone pole, or any other outdoors
   infrastructure is prohibited.

   (3) The emissions from equipment operated under this section shall not be
   intentionally directed outside of the building in which the equipment is
   located, such as through a window or a doorway.

   (4) Devices operating under the provisions of this section shall bear the
   following or similar statement in a conspicuous location on the device or in
   the instruction manual supplied with the device: “This equipment may only be
   operated indoors. Operation outdoors is in violation of 47 U.S.C. 301 and
   could subject the operator to serious legal penalties.”

   (b) Operation under the provisions of this section is not permitted on
   aircraft or satellites.

   (c) Within the 92-95 GHz bands, the emission levels shall not exceed the
   following:

   (1) The average power density of any emission, measured during the transmit
   interval, shall not exceed 9 uW/sq. cm, as measured at 3 meters from the
   radiating structure, and the peak power density of any emission shall not
   exceed 18 uW/sq. cm, as measured 3 meters from the radiating structure.

   (2) Peak power density shall be measured with an RF detector that has a
   detection bandwidth that encompasses the band being used and has a video
   bandwidth of at least 10 MHz, or uses an equivalent measurement method.

   (3) The average emission limits shall be calculated based on the measured
   peak levels, over the actual time period during which transmission occurs.

   (d) Limits on spurious emissions:

   (1) The power density of any emissions outside the band being used shall
   consist solely of spurious emissions.

   (2) Radiated emissions below 40 GHz shall not exceed the general limits in
   § 15.209.

   (3) Between 40 GHz and 200 GHz, the level of these emissions shall not
   exceed 90 pW/cm2 at a distance of 3 meters.

   (4) The levels of the spurious emissions shall not exceed the level of the
   fundamental emission.

   (e) The total peak transmitter output power shall not exceed 500 mW.

   (f) Fundamental emissions must be contained within the frequency bands
   specified in this section during all conditions of operation. Equipment is
   presumed to operate over the temperature range −20 to + 50 degrees Celsius
   with an input voltage variation of 85% to 115% of rated input voltage,
   unless justification is presented to demonstrate otherwise.

   (g)  Regardless  of  the maximum EIRP and maximum power density levels
   permitted under this section, devices operating under the provisions of this
   section are subject to the radiofrequency radiation exposure requirements
   specified  in  47  CFR  1.1307(b), 2.1091, and 2.1093, as appropriate.
   Applications for equipment authorization of devices operating under this
   section  must  contain  a  statement  confirming compliance with these
   requirements  for  both  fundamental emissions and unwanted emissions.
   Technical information showing the basis for this statement must be submitted
   to the Commission upon request.

   (h)  Any  transmitter  that  has  received the necessary FCC equipment
   authorization under the rules of this chapter may be mounted in a group
   installation  for  simultaneous  operation  with  one  or  more  other
   transmitter(s) that have received the necessary FCC equipment authorization,
   without any additional equipment authorization. However, no transmitter
   operating under the provisions of this section may be equipped with external
   phase-locking inputs that permit beam-forming arrays to be realized.

   [ 69 FR 3265 , Jan. 23, 2004]

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Subpart D—Unlicensed Personal Communications Service Devices

   Source:  58 FR 59180 , Nov. 8, 1993, unless otherwise noted.

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