Goto Section: 22.535 | 22.559 | Table of Contents
FCC 22.537
Revised as of October 1, 2013
Goto Year:2012 |
2014
§ 22.537 Technical channel assignment criteria.
The rules in this section establish technical assignment criteria for
the channels listed in § 22.531. These criteria permit channel
assignments to be made in a manner such that reception by public paging
receivers of signals from base transmitters, within the service area of
such base transmitters, is protected from interference caused by the
operation of independent co-channel base transmitters.
(a) Contour overlap. The FCC may grant an application requesting
assignment of a channel to a proposed base transmitter only if:
(1) The interfering contour of the proposed transmitter does not
overlap the service contour of any protected co-channel transmitter
controlled by a carrier other than the applicant, unless that carrier
has agreed in writing to accept any interference that may result from
operation of the proposed transmitter; and,
(2) The service contour of the proposed transmitter does not overlap
the interfering contour of any protected co-channel transmitter
controlled by a carrier other than the applicant, unless the applicant
agrees to accept any interference that may result from operation of the
protected co-channel transmitter; and,
(3) The area and/or population to which service would be provided by
the proposed transmitter is substantial, and service gained would
exceed that lost as a result of agreements to accept interference.
(b) Protected transmitter. For the purposes of this section, protected
transmitters are authorized transmitters for which there is a current
FCC public record and transmitters proposed in prior-filed pending
applications.
(c) VHF service contour. For paging stations transmitting on the VHF
channels, the distance from the transmitting antenna to the service
contour along each cardinal radial is calculated as follows:
d=1.243 *h0.40 *p0.20
where d is the radial distance in kilometers
h is the radial antenna HAAT in meters
p is the radial ERP in Watts
(1) Whenever the actual HAAT is less than 30 meters (98 feet), 30 must
be used as the value for h in the above formula.
(2) The value used for p in the above formula must not be less than 27
dB less than the maximum ERP in any direction or 0.1 Watt, whichever is
more.
(3) The distance from the transmitting antenna to the service contour
along any radial other than the eight cardinal radials is routinely
calculated by linear interpolation of distance as a function of angle.
However, in resolving petitions to deny, the FCC may calculate the
distance to the service contour using the formula in paragraph (c) of
this section with actual HAAT and ERP data for the inter-station radial
and additional radials above and below the inter-station radial at
2.5DEG intervals.
(d) VHF interfering contour. For paging stations transmitting on the
VHF channels, the distance from the transmitting antenna to the
interfering contour along each cardinal radial is calculated as
follows:
d=6.509 *h0.28 *p0.17
where d is the radial distance in kilometers
h is the radial antenna HAAT in meters
p is the radial ERP in Watts
(1) Whenever the actual HAAT is less than 30 meters (98 feet), 30 must
be used as the value for h in the above formula.
(2) The value used for p in the above formula must not be less than 27
dB less than the maximum ERP in any direction or 0.1 Watt, whichever is
more.
(3) The distance from the transmitting antenna to the interfering
contour along any radial other than the eight cardinal radials is
routinely calculated by linear interpolation of distance as a function
of angle. In resolving petitions to deny, however, the FCC may
calculate the distance to the interfering contour using the formula in
paragraph (d) of this section with actual HAAT and ERP data for the
inter-station radial and additional radials above and below the
inter-station radial at 2.5DEG intervals.
(e) 931 MHz service contour. For paging stations transmitting on the
931 MHz channels, the service contour is a circle, centered on the
transmitting antenna, with a radius determined from Table E-1 of this
section.
Table E--1-931 MHz Paging Service Radii
Service radius km (miles) Effective radiated power (Watts)
Antenna HAAT meters (feet) 0-125 126-250 251-500 501-1000 1001-1860
1861-3500
0-177 32.2 (20) 32.2 (20) 32.2 (20) 32.2 (20) 32.2 (20) 32.2 (20)
(0-581)
178-305 32.2 (20) 32.2 (20) 32.2 (20) 32.2 (20) 37.0 (23) 41.8 (26)
(582-1001)
306-427 32.2 (20) 32.2 (20) 37.0 (23) 41.8 (26) 56.3 (35) 56.3 (35)
(1002-1401)
428-610 32.2 (20) 37.0 (23) 41.8 (26) 56.3 (35) 56.3 (35) 56.3 (35)
(1402-2001)
611-861 37.0 (23) 41.8 (26) 41.8 (26) 56.3 (35) 83.7 (52) 83.7 (52)
(2002-2825)
862-1219 41.8 (26) 56.3 (35) 56.3 (35) 83.7 (52) 83.7 (52) 83.7 (52)
(2826-3999)
1220+ 56.3 (35) 56.3 (35) 83.7 (52) 83.7 (52) 83.7 (52) 83.7 (52)
(4000+)
(f) 931 MHz interfering contour. For paging stations transmitting on
the 931 MHz channels, the interfering contour is a circle, centered on
the transmitting antenna, with a radius determined from Table E-2 of
this section.
Table E--2-931 MHz Paging Interfering Radii
Interfering radius km (miles) Effective radiated power (Watts)
Antenna HAAT meters (feet) 0-125 126-250 251-500 501-1000 1001-1860
1861-3500
0-177 80.5 (50) 80.5 (50) 80.5 (50) 80.5 (50) 80.5 (50) 80.5 (50)
(0-581)
178-305 80.5 (50) 80.5 (50) 80.5 (50) 80.5 (50) 88.5 (55) 96.6 (60)
(582-1001)
306-427 80.5 (50) 80.5 (50) 88.5 (55) 96.6 (60) 130.4 (81) 130.4 (81)
(1002-1401)
428-610 80.5 (50) 88.5 (55) 96.6 (60) 130.4 (81) 130.4 (81) 130.4 (81)
(1402-2001)
611-861 88.5 (55) 96.6 (60) 96.6 (60) 130.4 (81) 191.5 (119) 191.5
(119)
(2002-2825)
862-1219 96.6 (60) 130.4 (81) 130.4 (81) 191.5 (119) 191.5 (119) 191.5
(119)
(2826-3999)
1220+
(4000+) 130.4 (81) 130.4 (81) 191.5 (119) 191.5 (119) 191.5 (119) 191.5
(119)
(g) In-building radiation systems . The locations of in-building
radiation systems must be within the service contour(s) of the
licensee's authorized transmitter(s) on the same channel. In-building
radiation systems are not protected facilities, and therefore do not
have service or interfering contours.
(h) Signal boosters on 931 MHz channels. For the purpose of compliance
with § 22.165 and notwithstanding paragraphs (e) and (f) of this
section, signal boosters operating on the 931 MHz channels with an
antenna HAAT not exceeding 30 meters (98 feet) are deemed to have as a
service contour a circle with a radius of 1.0 kilometer (0.6 mile) and
as an interfering contour a circle with a radius of 10 kilometers (6.2
miles).
[ 59 FR 59507 , Nov. 17, 1994, as amended at 61 FR 31051 , June 19, 1996]
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Goto Section: 22.535 | 22.559
Goto Year: 2012 |
2014
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