§  95.2179   LPRS unwanted emission limits.

   The requirements in this section apply to each LPRS transmitter type
   both with and without the connection of attachments, such as an
   external microphone, power cord and/or antenna.

   (a) Emission masks. Emission masks applicable to transmitting equipment
   in the LPRS are defined by the requirements in the following table. The
   numbers in the paragraphs column refer to attenuation requirement rule
   paragraph numbers under paragraph (b) of this section.
         Channels       Paragraphs
   narrowband 5 kHz       (1), (2)
   standard band 25 kHz   (3), (4)
   extra band 50 kHz      (5), (6)
   AMTS 250 kHz           (7), (8)

   (b) Attenuation requirements. The power of unwanted emissions must be
   attenuated below the transmitter output power in Watts (P) by at least:

   (1) 30 + 20(fd − 2) dB, 55 + 10 log (P) dB, or 65 dB, whichever is the
   least attenuation, on any frequency removed from the center of the
   authorized bandwidth by a displacement frequency (fd, in kHz) of more
   than 2 kHz, up to and including 3.75 kHz.

   (2) 55 + 10 log (P) dB on any frequency removed from the center of the
   authorized bandwidth by more than 3.75 kHz.

   (3) 30 dB on any frequency removed from the channel center frequency by
   12.5 kHz to 22.5 kHz.

   (4) 43 + 10 log (P) dB on any frequency removed from the channel center
   frequency by more than 22.5 kHz.

   (5) 30 dB on any frequency removed from the channel center frequency by
   25 kHz to 35 kHz.

   (6) 43 + 10 log (P) dB on any frequency removed from the channel center
   frequency by more than 35 kHz.

   (7) 30 dB on any frequency removed from the channel center frequency by
   125 kHz to 135 kHz.

   (8) 43 + 10 log (P) dB on any frequency removed from the channel center
   frequency by more than 135 kHz.

   (c) Measurement conditions and procedures. The power of unwanted
   emissions in the frequency bands specified in paragraphs (b)(1), (3),
   (5), and (7) of this section is measured with a reference bandwidth of
   300 Hz. The power of unwanted emissions in the frequency ranges
   specified in paragraphs (b)(2), (4), (6), and (8) is measured with a
   reference bandwidth of at least 30 kHz.