Goto Section: 15.256 | 15.258 | Table of Contents
Revised as of September 1, 2021
Goto Year:2020 |
§ 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
(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
(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
(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
(3) The average emission limits shall be calculated based on the
measured peak levels, over the actual time period during which
(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) Radio frequency devices operating under the provisions of this part
are subject to the radio frequency radiation exposure requirements
specified in § § 1.1307(b), 1.1310, 2.1091, and 2.1093 of this chapter,
as appropriate. Applications for equipment authorization of mobile or
portable devices operating under this section must contain a statement
confirming compliance with these requirements. 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, as amended at 85 FR 18149 , Apr. 1, 2020]
Goto Section: 15.256 | 15.258
Goto Year: 2020 |
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