FCC 15.515 Revised as of October 1, 2006
Goto Year:2005 |
2007
Sec. 15.515 Technical requirements for vehicular radar systems.
(a) Operation under the provisions of this section is limited to UWB field
disturbance sensors mounted in terrestrial transportation vehicles. These
devices shall operate only when the vehicle is operating, e.g., the engine
is running. Operation shall occur only upon specific activation, such as
upon starting the vehicle, changing gears, or engaging a turn signal.
(b) The UWB bandwidth of a vehicular radar system operating under the
provisions of this section shall be contained between 22 GHz and 29 GHz. In
addition, the center frequency, f[C], and the frequency at which the highest
level emission occurs, f[M], must be greater than 24.075 GHz.
(c) Following proper installation, vehicular radar systems shall attenuate
any emissions within the 23.6–24.0 GHz band that appear 38 degrees or
greater above the horizontal plane by 25 dB below the limit specified in
paragraph (d) of this section. For equipment authorized, manufactured or
imported on or after January 1, 2005, this level of attenuation shall be 25
dB for any emissions within the 23.6–24.0 GHz band that appear 30 degrees or
greater above the horizontal plane. For equipment authorized, manufactured
or imported on or after January 1, 2010, this level of attenuation shall be
30 dB for any emissions within the 23.6–24.0 GHz band that appear 30 degrees
or greater above the horizontal plane. For equipment authorized,
manufactured or imported on or after January 1, 2014, this level of
attenuation shall be 35 dB for any emissions within the 23.6–24.0 GHz band
that appear 30 degrees or greater above the horizontal plane. This level of
attenuation can be achieved through the antenna directivity, through a
reduction in output power or any other means.
(d) The radiated emissions at or below 960 MHz from a device operating under
the provisions of this section shall not exceed the emission levels in
Sec. 15.209. The radiated emissions above 960 MHz from a device operating under
the provisions of this section shall not exceed the following average limits
when measured using a resolution bandwidth of 1 MHz:
------------------------------------------------------------------------
Frequency in MHz EIRP in dBm
------------------------------------------------------------------------
960-1610............................................. -75.3
1610-22,000.......................................... -61.3
22,000-29,000........................................ -41.3
29,000-31,000........................................ -51.3
Above 31,000......................................... -61.3
------------------------------------------------------------------------
(e) In addition to the radiated emission limits specified in the table in
paragraph (d) of this section, UWB transmitters operating under the
provisions of this section shall not exceed the following average limits
when measured using a resolution bandwidth of no less than 1 kHz:
------------------------------------------------------------------------
Frequency in MHz EIRP in dBm
------------------------------------------------------------------------
1164-1240............................................ -85.3
1559-1610............................................ -85.3
------------------------------------------------------------------------
(f) There is a limit on the peak level of the emissions contained within a
50 MHz bandwidth centered on the frequency at which the highest radiated
emission occurs, f[M]. That limit is 0 dBm EIRP. It is acceptable to employ
a different resolution bandwidth, and a correspondingly different peak
emission limit, following the procedures described in Sec. 15.521.
(g) The emission levels from devices operating under the provisions of this
section that employ gated transmissions may be measured with the gating
active. Measurements made in this manner shall be repeated over multiple
sweeps with the analyzer set for maximum hold until the amplitude
stabilizes.
[ 67 FR 34856 , May 16, 2002, as amended at 70 FR 6776 , Feb. 9, 2005]
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