Sec. 90.211  Modulation requirements.

    Each transmitter must meet the requirements of either paragraph (a) 
or (b) of this section. The requirements of this paragraph do not apply 
to mobile stations that are authorized to operate with a maximum power 
output of 2 watts or less.
    (a) Transmitters utilizing analog emissions that are equipped with 
an audio low-pass filter must meet the emission limitations specified in 
Sec. 90.210. Testing must be in accordance with the rules specified in 
part 2 of this chapter.
    (b) Transmitters utilizing digital or analog emissions without an 
audio low-pass filter must be tested for type acceptance using the 
digital or analog modulating signal or signals specified by the part 2 
of this chapter. The type acceptance application must contain such 
information as may be necessary to demonstrate that the transmitter 
complies with the emission limitations specified in Sec. 90.210.
[60 1997 FR 37266 , July 19, 1995, as amended at  62 FR 2039 , Jan. 15, 1997]