§  27.1509   Emission limits.

   The power of any emission outside a licensee's frequency band(s) of
   operation shall be attenuated below the transmitter power (P) in watts
   by at least the following amounts:

   (a) For 900 MHz broadband operations in 897.5-900.5 MHz band by at
   least 43 + 10 log (P) dB.

   (b) For 900 MHz broadband operations in the 936.5-939.5 MHz band, by at
   least 50 + 10 log (P) dB.

   (c) Compliance with the provisions of paragraphs (a) and (b) of this
   section is based on the use of measurement instrumentation employing a
   resolution bandwidth of 100 kHz or greater. However, in the 100 kHz
   bands immediately outside and adjacent to the licensee's band, a
   resolution bandwidth of at least 1 percent of the emission bandwidth of
   the fundamental emission of the transmitter may be employed. The
   emission bandwidth is defined as the width of the signal between two
   points, one below the carrier center frequency and one above the
   carrier center frequency, outside of which all emissions are attenuated
   at least 26 dB below the transmitter power.

   (d) The measurements of emission power can be expressed in peak or
   average values, provided they are expressed in the same parameters as
   the transmitter power.

   (e) 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.