Sec. 2.977  Changes in notified equipment.

    (a) Under the notification procedure, the grantee warrants that each 
unit of equipment marketed under the identification specified in the 
grant of equipment authorization will conform to the unit(s) tested and 
found acceptable by the grantee and that data on file with the grantee, 
as required in Sec. 2.938, continues to be representative of the 
equipment being produced under such notification within the variation 
that can be expected due to quantity production and testing on a 
statistical basis.
    (b) Changes in the electrical and mechanical construction of 
equipment requiring an application for, and grant of, notification are 
permissive, providing that the changes do not cause the equipment to 
exceed the standards applicable to that equipment.
    (c) Permissive changes to transmitters notified for operation under 
part 73 of this chapter include the following:
    (1) The interconnection of a type accepted AM broadcast stereophonic 
exciter-generator with a notified AM broadcast transmitter in accordance 
with the manufacturer's instructions and upon completion of measurements 
showing that the modified transmitter meets the emission limitations 
applicable thereto.
    (2) The interconnection of a utility load management exciter with a 
notified AM broadcast transmitter in accordance with the manufacturer's 
instructions and completion of equipment performance measurements 
showing the transmitter meets the minimum performance requirements 
applicable thereto.
    (3) The addition of TV broadcast subcarrier generators to a notified 
TV broadcast transmitter or the addition of FM broadcast subcarrier 
generators to a notified FM broadcast transmitter, provided the 
transmitter exciter is designed for subcarrier operation without 
mechanical or electrical alterations to the exciter or other transmitter 
circuits.
    (4) The addition of TV broadcast stereophonic generators to a 
notified TV broadcast transmitter or the addition of FM broadcast 
stereophonic generators to a notified FM broadcast transmitter, provided 
the transmitter exciter is designed for stereophonic sound operation 
without mechanical or electrical alterations to the exciter or other 
transmitter circuits.
    (5) The addition of subscription TV encoding equipment for which the 
FCC has granted advance approval under the provisions of Sec. 2.1400 in 
subpart M and Sec. 73.644(c) of part 73 of this chapter to a notified 
transmitter.
    (d) Notwithstanding the provisions of this section, broadcast 
licensees or permittees are permitted to modify notified transmitters 
pursuant to Sec. 73.1690 of the FCC's Rules.
[ 48 FR 3621 , Jan. 26, 1983, as amended at  49 FR 3996 , Feb. 1, 1984;  49 FR 8252 , Mar. 6, 1984;  49 FR 27147 , July 2, 1984;  51 FR 2706 , Jan. 21, 
1986;  51 FR 41628 , Nov. 18, 1986]

                             Type Acceptance