Sec.  90.1323   Emission limits.

   (a) The power of any emission outside a licensee's frequency band(s) of
   operation shall be attenuated below the transmitter power (P) within the
   licensed band(s) of operation, measured in watts, by at least 43 + 10 log
   (P) dB. Compliance with this provision is based on the use of measurement
   instrumentation employing a resolution bandwidth of 1 MHz or less, but at
   least one percent of the emission bandwidth of the fundamental emission of
   the transmitter, provided the measured energy is integrated over a 1 MHz
   bandwidth.

   (b) When an emission outside of the authorized bandwidth causes harmful
   interference,  the  Commission may, at its discretion, require greater
   attenuation than specified in this section.