Goto Section: 25.215 | 25.217 | Table of Contents
FCC 25.216
Revised as of October 2, 2015
Goto Year:2014 |
2016
§ 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]
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Goto Section: 25.215 | 25.217
Goto Year: 2014 |
2016
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