Goto Section: 90.689 | 90.693 | Table of Contents

FCC 90.691
Revised as of December 4, 2012
Goto Year:2011 | 2013
  §  90.691   Emission mask requirements for EA-based systems.

   (a) Out-of-band emission requirement shall apply only to the “outer”
   channels included in an EA license and to spectrum adjacent to interior
   channels used by incumbent licensees. The emission limits are as
   follows:

   (1) For any frequency removed from the EA licensee's frequency block by
   up to and including 37.5 kHz, the power of any emission shall be
   attenuated below the transmitter power (P) in watts by at least 116
   Log10 (f/6.1) decibels or 50 + 10 Log10 (P) decibels or 80 decibels,
   whichever is the lesser attenuation, where f is the frequency removed
   from the center of the outer channel in the block in kilohertz and
   where f is greater than 12.5 kHz.

   (2) For any frequency removed from the EA licensee's frequency block
   greater than 37.5 kHz, the power of any emission shall be attenuated
   below the transmitter power (P) in watts by at least 43 + 10Log10 (P)
   decibels or 80 decibels, whichever is the lesser attenuation, where f
   is the frequency removed from the center of the outer channel in the
   block in kilohertz and where f is greater than 37.5 kHz.

   (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.

   return arrow Back to Top


Goto Section: 90.689 | 90.693

Goto Year: 2011 | 2013
CiteFind - See documents on FCC website that cite this rule

Want to support this service?
Thanks!

Report errors in this rule. Since these rules are converted to HTML by machine, it's possible errors have been made. Please help us improve these rules by clicking the Report FCC Rule Errors link to report an error.
hallikainen.com
Helping make public information public