Goto Section: 24.132 | 24.134 | Table of Contents
FCC 24.133
Revised as of October 1, 2006
Goto Year:2005 |
2007
Sec. 24.133 Emission limits.
(a) The power of any emission shall be attenuated below the transmitter
power (P), as measured in accordance with Sec. 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: 2005 |
2007
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