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Home , Effective radiated power, Radial (radio)

Federal Communications Commission § 22.535

PAGING OPERATION 931.0375 931.1375 931.2125 931.8625 931.0625 931.1625 931.2375 § 22.531 Channels for paging oper- ° ation. (2) From longitude W.81 to longitude W.85°: The following channels are allocated 931.0125 931.2125 931.3875 931.5875 for assignment to base 931.0375 931.2375 931.4125 931.6125 that provide paging service, either in- 931.0625 931.2625 931.4625 931.6375 dividually or collectively under a pag- 931.1125 931.2875 931.4875 931.8625 ing geographic area authorization. Un- 931.1375 931.3125 931.5125 less otherwise indicated, all channels 931.1625 931.3375 931.5375 have a bandwidth of 20 kHz and are des- 931.1875 931.3625 931.5625 ignated by their center frequencies in (3) Longitudes other than specified in MegaHertz. paragraphs (e)(1) and (e)(2) of this sec- Low VHF Channels tion: 35.20 35.46 43.20 43.46 931.0125 931.1625 931.2875 931.4125 35.22 35.50 43.22 43.50 931.0375 931.1875 931.3125 931.4625 35.24 35.54 43.24 43.54 931.0625 931.2125 931.3375 931.8625 35.26 35.56 43.26 43.56 931.1125 931.2375 931.3625 35.30 35.58 43.30 43.58 931.1375 931.2625 931.3875 35.34 35.60 43.34 43.60 (4) At any longitude, with authoriza- 35.38 35.62 43.38 43.62 35.42 35.66 43.42 43.66 tion condition requiring coordinated, shared use and equal access by licens- High VHF Channels ees in both countries: 152.24 152.84 158.10 158.70 931.4375 931.8875 931.9125 931.9375 UHF Channels 931.0125 931.2625 931.5125 931.7625 (f) For the purpose of issuing paging 931.0375 931.2875 931.5375 931.7875 geographic authorizations, the paging 931.0625 931.3125 931.5625 931.8125 geographic areas used for UHF chan- 931.0875 931.3375 931.5875 931.8375 nels are the MEAs, and the paging geo- 931.1125 931.3625 931.6125 931.8625 graphic areas used for the low and high 931.1375 931.3875 931.6375 931.8875 VHF channels are the EAs (see 931.1625 931.4125 931.6625 931.9125 931.1875 931.4375 931.6875 931.9375 § 22.503(b)). 931.2125 931.4625 931.7125 931.9625 [59 FR 59507, Nov. 17, 1994, as amended at 59 931.2375 931.4875 931.7375 931.9875 FR 59954, Nov. 21, 1994; 62 FR 11635, Mar. 12, (a)–(b) [Reserved] 1997; 63 FR 68945, Dec. 14, 1998; 64 FR 33784, June 24, 1999; 70 FR 19309, Apr. 13, 2005] (c) Upon application using FCC Form 601, common carriers may be author- § 22.535 lim- ized to provide one-way paging service its. using the leased subcarrier facilities of The effective radiated power (ERP) of broadcast stations licensed under part transmitters operating on the channels 73 of this chapter. listed in § 22.531 must not exceed the (d) Occasionally in case law and limits in this section. other formal and informal documents, (a) Maximum ERP. The ERP must not the low VHF channels have been re- exceed the applicable limits in this ferred to as ‘‘lowband’’ channels, and paragraph under any circumstances. the high VHF channels have been re- ferred to as ‘‘guardband’’ channels. Frequency range (MHz) Maximum (e) Pursuant to the U.S.-Canada In- ERP () terim Coordination Considerations for 35–36 ...... 600 929–932 MHz, as amended, only the fol- 43–44 ...... 500 152–159 ...... 1400 lowing UHF channels may be assigned 931–932 ...... 3500 in the continental United States North of Line A or in the State of Alaska (b) Basic power limit. Except as pro- East of Line C, within the indicated vided in paragraph (d) of this section, longitudes: the ERP of transmitters on the VHF (1) From longitude W.73° to longitude channels must not exceed 500 Watts. W.75° and from longitude W.78° to lon- (c) Height-power limit. Except as pro- gitude W.81°: vided in paragraph (d) of this section, 931.0125 931.1125 931.1875 931.2625 the ERP of transmitters on the VHF 61

VerDate Mar<15>2010 16:46 Dec 15, 2010 Jkt 220201 PO 00000 Frm 00071 Fmt 8010 Sfmt 8010 Q:\47\47V2 ofr150 PsN: PC150 § 22.537 47 CFR Ch. I (10–1–10 Edition)

channels must not exceed the amount by the operation of independent co- that would result in an average dis- channel base transmitters. tance to the service contour of 32.2 kil- (a) Contour overlap. The FCC may ometers (20 miles). The average dis- grant an application requesting assign- tance to the service contour is cal- ment of a channel to a proposed base culated by taking the arithmetic mean only if: of the distances determined using the (1) The interfering contour of the procedures specified in § 22.537 for the proposed transmitter does not overlap eight cardinal directions, ex- the service contour of any protected cluding cardinal radial directions for co-channel transmitter controlled by a which 90% or more of the distance so carrier other than the applicant, unless calculated is over water. that carrier has agreed in writing to (d) Encompassed interfering contour accept any interference that may re- areas. Transmitters are exempt from sult from operation of the proposed the basic power and height-power lim- transmitter; and, its of this section if the area within (2) The service contour of the pro- their interfering contours is totally en- posed transmitter does not overlap the compassed by the interfering contours interfering contour of any protected of operating co-channel base transmit- co-channel transmitter controlled by a ters controlled by the same licensee. carrier other than the applicant, unless For the purpose of this paragraph, op- the applicant agrees to accept any in- erating transmitters are authorized terference that may result from oper- transmitters that are providing service ation of the protected co-channel to subscribers. transmitter; and, (e) Adjacent channel protection. The (3) The area and/or population to ERP of transmitters must not exceed which service would be provided by the 500 Watts if they: proposed transmitter is substantial, (1) Transmit on a channel in the 152– and service gained would exceed that 159 MHz frequency range and are lo- lost as a result of agreements to accept cated less than 5 kilometers (3.1 miles) interference. from any station licensed in the Pri- (b) Protected transmitter. For the pur- vate Services that receives on an poses of this section, protected trans- adjacent channel; or, mitters are authorized transmitters for (2) Transmit on channel 158.10 or which there is a current FCC public 158.70 MHz and are located less than 5 record and transmitters proposed in kilometers (3.1 miles) from any station prior-filed pending applications. licensed in the Public Mobile Services (c) VHF service contour. For paging that receives on either of the following stations transmitting on the VHF adjacent channels: 158.07 MHz or 158.67 channels, the distance from the trans- MHz. mitting to the service contour along each cardinal radial is calculated (f) Signal boosters. The effective radi- as follows: ated power of signal boosters must not exceed 5 watts ERP under any normal d=1.243×h0.40×p0.20 operating condition. where d is the radial distance in kilometers [59 FR 59507, Nov. 17, 1994, as amended at 61 h is the radial antenna HAAT in meters FR 31051, June 19, 1996] p is the radial ERP in Watts (1) Whenever the actual HAAT is less § 22.537 Technical channel assignment than 30 meters (98 feet), 30 must be criteria. used as the value for h in the above for- The rules in this section establish mula. technical assignment criteria for the (2) The value used for p in the above channels listed in § 22.531. These cri- formula must not be less than 27 dB teria permit channel assignments to be less than the maximum ERP in any di- made in a manner such that reception rection or 0.1 , whichever is more. by public paging receivers of signals (3) The distance from the transmit- from base transmitters, within the ting antenna to the service contour service area of such base transmitters, along any radial other than the eight is protected from interference caused cardinal radials is routinely calculated

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