Sec. 18.309  Frequency range of measurements.

    (a) For field strength measurements:

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---------------------------------
                                                             Range of frequency
 measurements                    
Frequency band in which device operates ---------------------------------------
---------------------------------
                 (MHz)                             Lowest frequency            
        Highest frequency        
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---------------------------------
Below 1.705............................  Lowest frequency generated in the    3
0 MHz.                           
                                          device, but not lower than 9 kHz.    
                                 
1.705 to 30............................  Lowest frequency generated in the    4
00 MHz.                          
                                          device, but not lower than 9 kHz.    
                                 
30 to 500..............................  Lowest frequency generated in the    T
enth harmonic or 1,000 MHz,      
                                          device or 25 MHz, whichever is       
whichever is higher.             
                                          lower.                               
                                 
500 to 1,000...........................  Lowest frequency generated in the    T
enth harmonic.                   
                                          device or 100 MHz, whichever is      
                                 
                                          lower.                               
                                 
Above 1,000............................  ......do...........................  T
enth harmonic or highest         
                                                                               
detectable emission.             
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    (b) For conducted powerline measurements, the frequency range over 
which the limits are specified will be scanned.
[ 50 FR 36070 , Sept. 5, 1985, as amended at  51 FR 17971 , May 16 1986]