Goto Section: 25.215 | 25.217 | Table of Contents
FCC 25.216
Revised as of October 1, 2011
Goto Year:2010 |
2012
§ 25.216 Limits on emissions from mobile earth stations for protection of
aeronautical radionavigation-satellite service.
(a) The e.i.r.p. density of emissions from mobile earth stations placed
in service on or before July 21, 2002 with assigned uplink frequencies
between 1610 MHz and 1660.5 MHz shall not exceed -70 dBW/MHz, averaged
over any 2 millisecond active transmission interval, in the band
1559-1587.42 MHz. The e.i.r.p. of discrete emissions of less than 700
Hz bandwidth generated by such stations shall not exceed -80 dBW,
averaged over any 2 millisecond active transmission interval, in that
band.
(b) The e.i.r.p. density of emissions from mobile earth stations placed
in service on or before July 21, 2002 with assigned uplink frequencies
between 1610 MHz and 1626.5 MHz shall not exceed -64 dBW/MHz, averaged
over any 2 millisecond active transmission interval, in the band
1587.42-1605 MHz. The e.i.r.p. of discrete emissions of less than 700
Hz bandwidth generated by such stations shall not exceed -74 dBW,
averaged over any 2 millisecond active transmission interval, in the
1587.42-1605 MHz band.
(c) The e.i.r.p. density of emissions from mobile earth stations placed
in service after July 21, 2002 with assigned uplink frequencies between
1610 MHz and 1660.5 MHz shall not exceed -70 dBW/MHz, averaged over any
2 millisecond active transmission interval, in the band 1559-1605 MHz.
The e.i.r.p. of discrete emissions of less than 700 Hz bandwidth from
such stations shall not exceed -80 dBW, averaged over any 2 millisecond
active transmission interval, in the 1559-1605 MHz band.
(d) As of January 1, 2005, the e.i.r.p. density of emissions from
mobile earth stations placed in service on or before July 21, 2002 with
assigned uplink frequencies between 1610 MHz and 1660.5 MHz (except
Standard A and B Inmarsat terminals used as Global Maritime Distress
and Safety System ship earth stations) shall not exceed -70dBW/MHz,
averaged over any 2 millisecond active transmission interval, in the
1559-1605 MHz band. The e.i.r.p. of discrete emissions of less than 700
Hz bandwidth from such stations shall not exceed -80 dBW, averaged over
any 2 millisecond active transmission interval, in the 1559-1605 MHz
band. Standard A Inmarsat terminals used as Global Maritime Distress
and Safety System ship earth stations that do not meet the e.i.r.p.
density limits specified in this paragraph may continue operation until
December 31, 2007. Inmarsat-B terminals manufactured more than six
months after Federal Register publication of the rule changes adopted
in FCC 03-283 must meet these limits. Inmarsat B terminals manufactured
before then are temporarily grandfathered under the condition that no
interference is caused by these terminals to aeronautical satellite
radio-navigation systems. The full-compliance deadline for
grandfathered Inmarsat-B terminals is December 31, 2012.
(e) The e.i.r.p density of emissions from mobile earth stations with
assigned uplink frequencies between 1990 MHz and 2025 MHz shall not
exceed -70 dBW/MHz, averaged over any 2 millisecond active transmission
interval, in frequencies between 1559 MHz and 1610 MHz. The e.i.r.p. of
discrete emissions of less than 700 Hz bandwidth from such stations
between 1559 MHz and 1605 MHz shall not exceed -80 dBW, averaged over
any 2 millisecond active transmission interval. The e.i.r.p. of
discrete emissions of less than 700 Hz bandwidth from such stations
between 1605 MHz and 1610 MHz manufactured more than six months after
Federal Register publication of the rule changes adopted in FCC 03-283
shall not exceed -80 dBW, averaged over any 2 millisecond active
transmission interval.
(f) Mobile earth stations placed in service after July 21, 2002 with
assigned uplink frequencies in the 1610-1660.5 MHz band shall suppress
the power density of emissions in the 1605-1610 MHz band to an extent
determined by linear interpolation from -70 dBW/MHz at 1605 MHz to -10
dBW/MHz at 1610 MHz.
(g) Mobile earth stations manufactured more than six months after
Federal Register publication of the rule changes adopted in FCC 03-283
with assigned uplink frequencies in the 1610-1626.5 MHz band shall
suppress the power density of emissions in the 1605-1610 MHz
band-segment to an extent determined by linear interpolation from -70
dBW/MHz at 1605 MHz to -10 dBW/MHz at 1610 MHz averaged over any 2
millisecond active transmission interval. The e.i.r.p of discrete
emissions of less than 700 Hz bandwidth from such stations shall not
exceed a level determined by linear interpolation from -80 dBW at 1605
MHz to -20 dBW at 1610 MHz, averaged over any 2 millisecond active
transmission interval.
(h) Mobile earth stations manufactured more than six months after
Federal Register publication of the rule changes adopted in FCC 03-283
with assigned uplink frequencies in the 1626.5-1660.5 MHz band shall
suppress the power density of emissions in the 1605-1610 MHz
band-segment to an extent determined by linear interpolation from -70
dBW/MHz at 1605 MHz to -46 dBW/MHz at 1610 MHz, averaged over any 2
millisecond active transmission interval. The e.i.r.p of discrete
emissions of less than 700 Hz bandwidth from such stations shall not
exceed a level determined by linear interpolation from -80 dBW at 1605
MHz to -56 dBW at 1610 MHz, averaged over any 2 millisecond active
transmission interval.
(i) The e.i.r.p density of carrier-off state emissions from mobile
earth stations manufactured more than six months after
Federal Register publication of the rule changes adopted in FCC 03-283
with assigned uplink frequencies between 1 and 3 GHz shall not exceed
-80 dBW/MHz in the 1559-1610 MHz band averaged over any two millisecond
interval.
(j) A Root-Mean-Square detector shall be used for all power density
measurements.
[ 69 FR 5710 , Feb. 6, 2004, as amended at 70 FR 19318 , Apr. 13, 2005]
Goto Section: 25.215 | 25.217
Goto Year: 2010 |
2012
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