Goto Section: 1.30002 | 1.30004 | Table of Contents
FCC 1.30003
Revised as of October 2, 2015
Goto Year:2014 |
2016
§ 1.30003 Installations on an AM antenna.
(a) Installations on a nondirectional AM tower. When antennas are installed
on a nondirectional AM tower the AM station shall determine the operating
power by the indirect method (see § 73.51 of this chapter). Upon completion
of the installation, antenna impedance measurements on the AM antenna shall
be made. If the resistance of the AM antenna changes by more than 2 percent
(see § 73.45(c)(1) of this chapter), 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 a directional AM array. Before antennas are installed
on a tower in a directional AM array, the proponent shall notify the AM
station so that, if necessary, the AM station may determine operating power
by the indirect method (see § 73.51 of this chapter) and request special
temporary authority pursuant to § 73.1635 of this chapter to operate with
parameters at variance.
(1) For AM stations licensed via field strength measurements (see
§ 73.151(a)), a partial proof of performance as defined by § 73.154 of this
chapter shall be conducted by the tower proponent both before and after
construction to establish that the AM array will not be and has not been
adversely affected. If the operating parameters of the AM array change
following the installation, the results of the partial proof of performance
shall be filed by the AM station with the Commission on Form 302-AM.
(2) For AM stations licensed via a moment method proof (see § 73.151(c) of
this chapter), a base impedance measurement on the tower being modified
shall be made by the tower proponent as described in § 73.151(c)(1). The
result of the new tower impedance measurement shall be retained in the
station's records. If the new measured base resistance and reactance values
of the affected tower differ by more than ±2 ohms and ±4 percent from the
corresponding modeled resistance and reactance values contained in the last
moment method proof, then the station shall file Form 302-AM. The Form
302-AM shall be accompanied by the new impedance measurements for the
modified tower and a new moment method model for each pattern in which the
tower is a radiating element. Base impedance measurements for other towers
in the array, sampling system measurements, and reference field strength
measurements need not be repeated. The procedures described in this
paragraph may be used as long as the affected tower continues to meet the
requirements for moment method proofing after the modification.
(c) Form 302-AM Filing. When the AM station is required to file Form 302-AM
following an installation as set forth in paragraphs (a) and (b) of this
section, the Form 302-AM shall be filed before or simultaneously with any
license application associated with the installation. If no license
application is filed as a result of the installation, the Form 302-AM shall
be filed within 30 days after the completion of the installation.
[ 78 FR 66295 , Nov. 5, 2013]
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Goto Section: 1.30002 | 1.30004
Goto Year: 2014 |
2016
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