Goto Section: 15.501 | 15.505 | Table of Contents
FCC 15.503
Revised as of October 1, 2007
Goto Year:2006 |
2008
Sec. 15.503 Definitions.
(a) UWB bandwidth. For the purpose of this subpart, the UWB bandwidth is the
frequency band bounded by the points that are 10 dB below the highest
radiated emission, as based on the complete transmission system including
the antenna. The upper boundary is designated f[H]and the lower boundary is
designated f[L]. The frequency at which the highest radiated emission occurs
is designated f[M].
(b) Center frequency. The center frequency, f[C], equals (f[H]+ f[L])/2.
(c) Fractional bandwidth. The fractional bandwidth equals 2(f[H]−f[L])/
(f[H]+ f[L]).
(d) Ultra-wideband (UWB) transmitter. An intentional radiator that, at any
point in time, has a fractional bandwidth equal to or greater than 0.20 or
has a UWB bandwidth equal to or greater than 500 MHz, regardless of the
fractional bandwidth.
(e) Imaging system. A general category consisting of ground penetrating
radar systems, medical imaging systems, wall imaging systems through-wall
imaging systems and surveillance systems. As used in this subpart, imaging
systems do not include systems designed to detect the location of tags or
systems used to transfer voice or data information.
(f) Ground penetrating radar (GPR) system. A field disturbance sensor that
is designed to operate only when in contact with, or within one meter of,
the ground for the purpose of detecting or obtaining the images of buried
objects or determining the physical properties within the ground. The energy
from the GPR is intentionally directed down into the ground for this
purpose.
(g) Medical imaging system. A field disturbance sensor that is designed to
detect the location or movement of objects within the body of a person or
animal.
(h) Wall imaging system. A field disturbance sensor that is designed to
detect the location of objects contained within a “wall” or to determine the
physical properties within the “wall.” The “wall” is a concrete structure,
the side of a bridge, the wall of a mine or another physical structure that
is dense enough and thick enough to absorb the majority of the signal
transmitted by the imaging system. This category of equipment does not
include products such as “stud locators” that are designed to locate objects
behind gypsum, plaster or similar walls that are not capable of absorbing
the transmitted signal.
(i) Through-wall imaging system. A field disturbance sensor that is designed
to detect the location or movement of persons or objects that are located on
the other side of an opaque structure such as a wall or a ceiling. This
category of equipment may include products such as “stud locators” that are
designed to locate objects behind gypsum, plaster or similar walls that are
not thick enough or dense enough to absorb the transmitted signal.
(j) Surveillance system. A field disturbance sensor used to establish a
stationary RF perimeter field that is used for security purposes to detect
the intrusion of persons or objects.
(k) EIRP. Equivalent isotropically radiated power, i.e., the product of the
power supplied to the antenna and the antenna gain in a given direction
relative to an isotropic antenna. The EIRP, in terms of dBm, can be
converted to a field strength, in dBuV/m at 3 meters, by adding 95.2. As
used in this subpart, EIRP refers to the highest signal strength measured in
any direction and at any frequency from the UWB device, as tested in
accordance with the procedures specified in Sec. 15.31(a) and 15.523 of this
chapter.
(l) Law enforcement, fire and emergency rescue organizations. As used in
this subpart, this refers to those parties eligible to obtain a license from
the FCC under the eligibility requirements specified in Sec. 90.20(a)(1) of this
chapter.
(m) Hand held. As used in this subpart, a hand held device is a portable
device, such as a lap top computer or a PDA, that is primarily hand held
while being operated and that does not employ a fixed infrastructure.
Goto Section: 15.501 | 15.505
Goto Year: 2006 |
2008
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