Goto Section: 73.1580 | 73.1610 | Table of Contents
FCC 73.1590
Revised as of October 1, 2008
Goto Year:2007 |
2009
Sec. 73.1590 Equipment performance measurements.
(a) The licensee of each AM, FM, TV and Class A TV station, except licensees
of Class D non-commercial educational FM stations authorized to operate with
10 watts or less output power, must make equipment performance measurements
for each main transmitter as follows:
(1) Upon initial installation of a new or replacement main transmitter.
(2) Upon modification of an existing transmitter made under the provisions
of Sec. 73.1690, Modification of transmission systems, and specified therein.
(3) Installation of AM stereophonic transmission equipment pursuant to
Sec. 73.128.
(4) Installation of FM subcarrier or stereophonic transmission equipment
pursuant to Sec. 73.295, Sec. 73.297, Sec. 73.593 or Sec. 73.597.
(5) Installation of TV stereophonic or subcarrier transmission equipment
pursuant to Sec. Sec. 73.669 and 73.1690.
(6) Annually, for AM stations, with not more than 14 months between
measurements.
(7) When required by other provisions of the rules or the station license.
(b) Measurements for spurious and harmonic emissions must be made to show
compliance with the transmission system requirements of Sec. 73.44 for AM
stations; Sec. 73.317 for FM stations and Sec. 73.687 for TV stations. Measurements
must be made under all conditions of modulation expected to be encountered
by the station whether transmitting monophonic or stereophonic programs and
providing subsidiary communications services.
(c) TV visual equipment performance measurements must be made with the
equipment adjusted for normal program operation at the transmitter antenna
sampling port to yield the following information:
(1) Field strength or voltage of the lower side-band for a modulating
frequency of 1.25 MHz or greater, (including 3.58 MHz for color), and of the
upper side-band for a modulating frequency of 4.75 MHz or greater.
(2) Data showing that the waveform of the transmitted signal conforms to
that specified by the standards for TV transmissions.
(3) Photographs of a test pattern taken from a receiver or monitor connected
to the transmitter output.
(4) Data showing envelope delay characteristics of the radiated signal.
(5) Data showing the attenuation of spurious and harmonic radiation, if,
after type acceptance, any changes have been made in the transmitter or
associated equipment (filters, multiplexer, etc.) which could cause changes
in its radiation products.
(d) The data required by paragraphs (b) and (c) of this section, together
with a description of the equipment and procedure used in making the
measurements, signed and dated by the qualified person(s) making the
measurements, must be kept on file at the transmitter or remote control
point for a period of 2 years, and on request must be made available during
that time to duly authorized representatives of the FCC.
[ 47 FR 8589 , Mar. 1, 1982, as amended at 51 FR 18450 , May 20, 1986; 65 FR 30004 , May 10, 2000]
Goto Section: 73.1580 | 73.1610
Goto Year: 2007 |
2009
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