Goto Section: 73.1690 | 73.1695 | Table of Contents
FCC 73.1692
Revised as of October 1, 2013
Goto Year:2012 |
2014
§ 73.1692 Broadcast station construction near or installation on an AM
broadcast tower.
Where a broadcast licensee or permittee proposes to mount a broadcast
antenna on an AM station tower, or where construction is proposed
within 0.8 km of an AM nondirectional tower or within 3.2 km of an AM
directional station, the broadcast licensee or permittee is responsible
for ensuring that the construction does not adversely affect the AM
station, as follows:
(a) Installations on an AM nondirectional tower. During installation of
the broadcast antenna and related equipment, the AM station shall
determine operating power by the indirect method ( see § 73.51). Upon
the completion of the installation, antenna impedance measurements on
the AM antenna shall be made, and, prior to or simultaneously with the
filing of the license application covering the broadcast station
installation, an application on FCC Form 302-AM (including a tower
sketch of the installation) shall be filed with the Commission for the
AM station to return to direct power measurement.
(b) Installations on an AM directional array. Prior to commencing
construction, the broadcast permittee or licensee shall notify the AM
station so that, if necessary, the AM station may determine operating
power by the indirect method ( see § 73.51) and request special
temporary authority pursuant to § 73.1635 to operate with parameters
at variance in order to maintain monitoring point field strengths
within authorized limits. Both prior to the commencement of
construction and upon completion of construction, a partial proof of
performance (as defined by § 73.154) shall be conducted to establish
that the AM array has not been adversely affected. Prior to or
simultaneously with filing of the license application to cover the
broadcast station construction, the results of the partial proof of
performance shall be filed with the Commission on Form 302-AM.
(c) Tower erections or modifications within 0.8 km of an AM
nondirectional tower. Prior to commencing the construction of tower
modifications, or the erection of a new tower, within 0.8 km of an AM
nondirectional tower, the broadcast permittee or licensee is required
to notify the AM station so that the AM station may commence
determining operating power by the indirect method ( see § 73.51). The
broadcast licensee or permittee shall be responsible for the
installation and continued maintenance of detuning apparatus necessary
to prevent adverse effects on the radiation pattern of the AM station.
Both prior to construction of the tower modifications and upon
completion of construction, antenna impedance measurements of the AM
station shall be made. In addition, sufficient field strength
measurements taken at a minimum of 10 locations along each of 8 equally
spaced radials, shall be made to establish that the AM radiation
pattern is essentially omnidirectional. Prior or simultaneously with
the filing of the application for license to cover this permit, the
results of the impedance measurements and the field strength
measurements shall be filed with the Commission on FCC Form 302-AM for
the AM station to return to the direct method of power determination.
(d) Tower erections or modifications within 3.2 km of an AM directional
station. Prior to commencing construction of tower modifications, or
the erection of a new tower structure, within 3.2 km of an AM
directional array, the broadcast permittee or licensee shall notify the
AM station so that, if necessary, the AM station may determine
operating power by the indirect method ( see § 73.51) and request
special temporary authority pursuant to § 73.1635 to operate with
parameters at variance in order to maintain monitoring point field
strengths within authorized limits. The broadcast licensee or permittee
shall be responsible for the installation and continued maintenance of
detuning apparatus necessary to prevent adverse effects upon the
radiation pattern of the AM station. Both prior to the commencement of
construction and upon completion of construction, a partial proof of
performance (as defined by § 73.154) shall be conducted to establish
that the AM array has not been adversely affected. Prior to or
simultaneously with filing of the license application to cover the
broadcast station construction, the results of the partial proof of
performance shall be filed with the Commission on Form 302-AM.
[ 62 FR 51062 , Sept. 30, 1997]
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Goto Section: 73.1690 | 73.1695
Goto Year: 2012 |
2014
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