FCC 74.1236 Revised as of October 1, 2007
Goto Year:2006 |
2008
Sec. 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 Sec. 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, Sec. 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 spurious emissions.
(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
unmodulated carrier
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 channel.
[ 35 FR 15388 , Oct. 2, 1970, as amended at 52 FR 31406 , Aug. 20, 1987; 55 FR 50698 , Dec. 10, 1990]
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