47 CFR 90.669 - Emission limits.

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§ 90.669 Emission limits.

(a) On any frequency in an MTA licensee's spectrum block that is adjacent to a non-MTA frequency, the power of any emission shall be attenuated below the transmitter power (P) by at least 43 plus 10 log10(P) decibels or 80 decibels, whichever is the lesser attenuation.


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.

(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.

[60 FR 21992, May 4, 1995]

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United States Code
Statutes at Large

Title 47 published on 2015-10-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 47 CFR Part 90 after this date.

  • 2015-11-25; vol. 80 # 227 - Wednesday, November 25, 2015
    1. 80 FR 73696 - Public Safety and Homeland Security Bureau Seeks Comment on FirstNet's Incumbent Relocation Proposal
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      Proposed rule.
      Comments are due on or before December 9, 2015.
      47 CFR Part 90