Goto Section: 24.132 | 24.134 | Table of Contents
FCC 24.133
Revised as of October 1, 2011
Goto Year:2010 |
2012
§ 24.133 Emission limits.
(a) The power of any emission shall be attenuated below the transmitter
power (P), as measured in accordance with § 24.132(f), in accordance
with the following schedule:
(1) For transmitters authorized a bandwidth greater than 10 kHz:
(i) On any frequency outside the authorized bandwidth and removed from
the edge of the authorized bandwidth by a displacement frequency
(f[d]in kHz) of up to and including 40 kHz: at least 116
Log[10]((f[d]+10)/6.1) decibels or 50 plus 10 Log[10](P) decibels or 70
decibels, whichever is the lesser attenuation;
(ii) On any frequency outside the authorized bandwidth and removed from
the edge of the authorized bandwidth by a displacement frequency
(f[d]in kHz) of more than 40 kHz: at least 43+10 Log[10](P) decibels or
80 decibels, whichever is the lesser attenuation.
(2) For transmitters authorized a bandwidth of 10 kHz:
(i) On any frequency outside the authorized bandwidth and removed from
the edge of the authorized bandwidth by a displacement frequency
(f[d]in kHz) of up to and including 20 kHz: at least 116 *
Log[10]((f[d]+5)/3.05) decibels or 50+10 *Log[10](P) decibels or 70
decibels, whichever is the lesser attenuation;
(ii) On any frequency outside the authorized bandwidth and removed from
the edge of the authorized bandwidth by a displacement frequency
(f[d]in kHz) of more than 20 kHz: at least 43+10 Log[10](P) decibels or
80 decibels, whichever is the lesser attenuation.
(b) 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.
(c) 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.
(d) The following minimum spectrum analyzer resolution bandwidth
settings will be used: 300 Hz when showing compliance with paragraphs
(a)(1)(i) and (a)(2)(i) of this section; and 30 kHz when showing
compliance with paragraphs (a)(1)(ii) and (a)(2)(ii) of this section.
[ 58 FR 59183 , Nov. 8, 1993. Redesignated at 59 FR 18499 , April 19,
1994, as amended at 59 FR 14119 , Mar. 25, 1994; 66 FR 10968 , Feb. 21,
2001]
Goto Section: 24.132 | 24.134
Goto Year: 2010 |
2012
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