Goto Section: 1.30002 | 1.30004 | Table of Contents
Revised as of October 20, 2020
Goto Year:2020 |
§ 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 Â±2 ohms and Â±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]
Goto Section: 1.30002 | 1.30004
Goto Year: 2020 |
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