Goto Section: 22.535 | 22.559 | Table of Contents
FCC 22.537
Revised as of October 1, 2008
Goto Year:2007 |
2009
Sec. 22.537 Technical channel assignment criteria.
The rules in this section establish technical assignment criteria for the
channels listed in Sec. 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×h^0.40 ×p^0.20
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 2.5 ° 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×h^0.28 ×p^0.17
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 2.5 ° 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
Sec. 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]
Goto Section: 22.535 | 22.559
Goto Year: 2007 |
2009
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