Sec. 73.756  Transmission system requirements.

    (a) Design. The construction, installation, operation, and 
performance of the international broadcasting transmitter system shall 
be in accordance with good engineering practice.
    (b) Spurious emission. (1) Any emission appearing on a frequency 
removed from the carrier frequency by between 6.4 kHz and 10 kHz, 
inclusive, shall be attenuated at least 25 dB below the level of the 
unmodulated carrier. Compliance with the specification will be deemed to 
show the occupied bandwidth to be 10 kHz or less.
    (2) Any emission appearing on a frequency removed from the carrier 
frequency by more than 10 kHz and up to and including 25 kHz shall be 
attenuated at least 35 dB below the level of the unmodulated carrier.

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    (3) Any emission appearing on a frequency removed from the carrier 
frequency by more than 25 kHz shall be attenuated at least 80 dB below 
the level of the unmodulated carrier.
    (4) In the event spurious emissions cause harmful interference to 
other stations or services, such additional steps as may be necessary to 
eliminate the interference must be taken immediately by the licensee.
    (c) Frequency control. The transmitter shall be equipped with 
automatic frequency control apparatus so designed and constructed that 
it is capable of maintaining the operating frequency within 0.0015 
percent of the assigned frequency.

(Secs. 4, 5, 303, 48 Stat., as amended, 1066, 1068, 1082 (47 U.S.C. 154, 
155, ))

[38 303 FR 18895 , July 16, 1973, as amended at  44 FR 65765 , Nov. 15, 1979]