Goto Section: 15.209 | 15.212 | Table of Contents
FCC 15.211
Revised as of October 2, 2015
Goto Year:2014 |
2016
§ 15.211 Tunnel radio systems.
An intentional radiator utilized as part of a tunnel radio system may
operate on any frequency provided it meets all of the following conditions:
(a) Operation of a tunnel radio system (intentional radiator and all
connecting wires) shall be contained solely within a tunnel, mine or other
structure that provides attenuation to the radiated signal due to the
presence of naturally surrounding earth and/or water.
(b) Any intentional or unintentional radiator external to the tunnel, mine
or other structure, as described in paragraph (a) of this section, shall be
subject to the other applicable regulations contained within this part.
(c) The total electromagnetic field from a tunnel radio system on any
frequency or frequencies appearing outside of the tunnel, mine or other
structure described in paragraph (a) of this section, shall not exceed the
limits shown in § 15.209 when measured at the specified distance from the
surrounding structure, including openings. Particular attention shall be
paid to the emissions from any opening in the structure to the outside
environment. When measurements are made from the openings, the distances
shown in § 15.209 refer to the distance from the plane of reference which
fits the entire perimeter of each above ground opening.
(d) The conducted limits in § 15.207 apply to the radiofrequency voltage on
the public utility power lines outside of the tunnel.
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Goto Section: 15.209 | 15.212
Goto Year: 2014 |
2016
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