Sec.  15.223   Operation in the band 1.705–10 MHz.

   (a) The field strength of any emission within the band 1.705–10.0 MHz shall
   not exceed 100 microvolts/meter at a distance of 30 meters. However, if the
   bandwidth of the emission is less than 10% of the center frequency, the
   field strength shall not exceed 15 microvolts/meter or (the bandwidth of the
   device  in kHz) divided by (the center frequency of the device in MHz)
   microvolts/meter at a distance of 30 meters, whichever is the higher level.
   For the purposes of this section, bandwidth is determined at the points 6 dB
   down from the modulated carrier. The emission limits in this paragraph are
   based on measurement instrumentation employing an average detector. The
   provisions in  Sec. 15.35(b) for limiting peak emissions apply.

   (b) The field strength of emissions outside of the band 1.705–10.0 MHz shall
   not exceed the general radiated emission limits in  Sec. 15.209.