Goto Section: 17.513 | 17.517
FCC 17.515
Revised as of June 29, 2005
Goto Year:2004 |
2006
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]
Goto Section: 17.513 | 17.517
Goto Year: 2004 |
2006
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