Sec. 2.991  Measurements required: Spurious emissions at antenna 
          terminals.

    The radio frequency voltage or powers generated within the equipment 
and appearing on a spurious frequency shall be checked at the equipment 
output terminals when properly loaded with a suitable artificial 
antenna. Curves or equivalent data shall show the magnitude of each 
harmonic and other spurious emission that can be detected when the 
equipment is operated under the conditions specified in Sec. 2.989 as 
appropriate. The magnitude of spurious emissions which are attenuated 
more than 20 dB below the permissible value need not be specified.

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