§  74.603   Sound channels.

   (a) The frequencies listed in § 74.602(a) may be used for the
   simultaneous transmission of the picture and sound portions of TV
   broadcast programs and for cue and order circuits, either by means of
   multiplexing or by the use of a separate transmitter within the same
   channel. When multiplexing of a TV STL station is contemplated,
   consideration should be given to the requirements of § 73.687 of this
   Chapter regarding the overall system performance requirements.
   Applications for new TV pickup, TV STL, TV relay and TV translator
   relay stations shall clearly indicate the nature of any mutliplexing
   proposed. Multiplexing equipment may be installed on licensed equipment
   without authority of the FCC, provided the installation of such
   apparatus on a TV STL station shall not result in degradation of the
   overall system performance of the TV broadcast station below that
   permitted by § 73.687 of this chapter.

   (b) [Reserved]

   (c) Aural STL or intercity relay stations licensed as of July 10, 1970,
   to operate in the frequency band 942-947 MHz, may continue to so
   operate pending a decision as to their disposition through a future
   rule making proceeding.

   (d) Remote pickup broadcast stations may be used in conjunction with
   television pickup stations for the transmission of the aural portion of
   television programs or events that occur outside a television studio
   and for the transmission of cues, orders, and other related
   communications necessary thereto. The rules governing remote pickup
   broadcast stations are contained in Subpart D of this part.

   [ 28 FR 13718 , Dec. 14, 1963, as amended at  47 FR 55936 , Dec. 14, 1982;
    48 FR 24385 , June 1, 1983;  68 FR 12769 , Mar. 17, 2003]