Sec. 15.209  Radiated emission limits; general requirements.

    (a) Except as provided elsewhere in this subpart, the emissions from 
an intentional radiator shall not exceed the field strength levels 
specified in the following table:

                                                                        
------------------------------------------------------------------------
                                                             Measurement
         Frequency (MHz)                Field strength         distance 
                                      (microvolts/meter)       (meters) 
------------------------------------------------------------------------
0.009-0.490......................  2400/F(kHz)                      300 
0.490-1.705......................  24000/F(kHz)                      30 
1.705-30.0.......................  30                                30 
30-88............................  100 **                             3 
88-216...........................  150 **                             3 
216-960..........................  200 **                             3 
Above 960........................  500                                3 
------------------------------------------------------------------------
** Except as provided in paragraph (g), fundamental emissions from      
  intentional radiators operating under this section shall not be       
  located in the frequency bands 54-72 MHz, 76-88 MHz, 174-216 MHz or   
  470-806 MHz. However, operation within these frequency bands is       
  permItted under other sections of this part, e.g., Secs.  15.231 and  
  15.241.                                                               

    (b) In the emission table above, the tighter limit applies at the 
band edges.
    (c) The level of any unwanted emissions from an intentional radiator 
operating under these general provisions shall not exceed the level of 
the fundamental emission. For intentional radiators which operate under 
the provisions of other sections within this part and which are required 
to reduce their unwanted emissions to the limits specified in this 
table, the limits in this table are based on the frequency of the 
unwanted emission and not the fundamental frequency. However, the level 
of any unwanted emissions shall not exceed the level of the fundamental 
frequency.
    (d) The emission limits shown in the above table are based on 
measurements employing a CISPR quasi-peak detector except for the 
frequency bands 9-90 kHz, 110-490 kHz and above 1000 MHz. Radiated 
emission limits in these three bands are based on measurements employing 
an average detector.
    (e) The provisions in Secs. 15.31, 15.33, and 15.35 for measuring 
emissions at distances other than the distances specified in the above 
table, determining the frequency range over which radiated emissions are 
to be measured, and limiting peak emissions apply to all devices 
operated under this part.
    (f) In accordance with Sec. 15.33(a), in some cases the emissions 
from an intentional radiator must be measured to beyond the tenth 
harmonic of the highest fundamental frequency designed to be emitted by 
the intentional radiator because of the incorporation of a digital 
device. If measurements above the tenth harmonic are so required, the 
radiated emissions above the tenth harmonic shall comply with the 
general radiated emission limits applicable to the incorporated digital 
device, as shown in Sec. 15.109 and as based on the frequency of the 
emission being measured, or, except for emissions contained in the 
restricted frequency bands shown in Sec. 15.205, the limit on spurious 
emissions specified for the intentional radiator, whichever is the 
higher limit. Emissions which must be measured above the tenth harmonic 
of the highest fundamental frequency designed to be emitted by the 
intentional radiator and which fall within the restricted bands shall 
comply with the general radiated emission limits in Sec. 15.109 that are 
applicable to the incorporated digital device.
    (g) Operation in the frequency bands allocated to TV broadcast 
stations:
    (1) Perimeter protection systems operating under the provisions of 
this section in the frequency bands allocated to TV broadcast stations, 
as shown in part 73 of this chapter, shall contain their fundamental 
emissions within the frequency bands 54-72 MHz and 76-88 MHz. Further, 
the use of such perimeter protection systems is limited to industrial, 
business and commercial applications.
    (2) Biomedical telemetry devices operating under the provisions of 
this section in the frequency bands allocated to TV broadcast stations, 
as shown in part 73 of this chapter, shall contain their fundamental 
emissions within the frequency band 512-566 MHz. Further, the marketing 
and the use of biomedical telemetry devices operating under this 
paragraph shall be limited to hospitals.
[ 54 FR 17714 , Apr. 25, 1989;  54 FR 32339 , Aug. 7, 1989;  55 FR 18340 , May 
2, 1990]