Goto Section: 74.1235 | 74.1237 | Table of Contents
Revised as of September 1, 2021
Goto Year:2020 |
§ 74.1236 Emission and bandwidth.
(a) The license of a station authorized under this subpart allows the
transmission of either F3 or other types of frequency modulation (see
§ 2.201 of this chapter) upon a showing of need, as long as the emission
complies with the following:
(1) For transmitter output powers no greater than 10 watts, paragraphs
(b), (c), and (d) of this section apply.
(2) For transmitter output powers greater than 10 watts, § 73.317 (a),
(b), (c), and (d) apply.
(b) Standard width FM channels will be assigned and the transmitting
apparatus shall be operated so as to limit spurious emissions to the
lowest practicable value. Any emissions including intermodulation
products and radiofrequency harmonics which are not essential for the
transmission of the desired aural information shall be considered to be
(c) The power of emissions appearing outside the assigned channel shall
be attenuated below the total power of the emission as follows:
Distance of emission from center frequency Minimum attenuation below
120 to 240 kHz 25 dB
Over 240 and up to 600 kHz 35 dB
Over 600 kHz 60 dB
(d) Greater attenuation than that specified in paragraph (c) of this
section may be required if interference results outside the assigned
[ 35 FR 15388 , Oct. 2, 1970, as amended at 52 FR 31406 , Aug. 20, 1987;
55 FR 50698 , Dec. 10, 1990]
Goto Section: 74.1235 | 74.1237
Goto Year: 2020 |
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