[Code of Federal Regulations]

[Title 47, Volume 2]

[Revised as of October 1, 2005]

From the U.S. Government Printing Office via GPO Access

[CITE: 47CFR27.55]



[Page 308]

 

                       TITLE 47--TELECOMMUNICATION

 

                         COMMISSION (CONTINUED)

 

PART 27_MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES--Table of Contents

 

                      Subpart C_Technical Standards

 

Sec. 27.55  Signal strength limits.



    (a) Field strength limits. For the following bands, the predicted or 

measured median field strength at any location on the geographical 

border of a licensee's service area shall not exceed the value specified 

unless the adjacent affected service area licensee(s) agree(s) to a 

different field strength. This value applies to both the initially 

offered service areas and to partitioned service areas.

    (1) 2110-2155, 2305-2320 and 2345-2360 MHz bands: 47 dB[micro]V/m.

    (2) 698-764 and 776-794 MHz bands: 40 dB[micro]V/m.

    (3) The paired 1392-1395 MHz and 1432-1435 MHz bands and the 

unpaired 1390-1392 MHz band (1.4 GHz band): 47 dB[micro]V/m.

    (4) BRS and EBS: The predicted or measured median field strength at 

any location on the geographical border of a licensee's service area 

shall not exceed the value specified unless the adjacent affected 

service area licensee(s) agree(s) to a different field strength. This 

value applies to both the initially offered services areas and to 

partitioned services areas. Licensees may exceed this signal level where 

there is no affected licensee that is constructed and providing service. 

Once the affected licensee is providing service, the original licensee 

will be required to take whatever steps necessary to comply with the 

applicable power level at its GSA boundary, absent consent from the 

affected licensee.

    (i) Prior to transition, the signal strength at any point along the 

licensee's GSA boundary does not exceed the greater of that permitted 

under the licensee's Commission authorizations as of January 10, 2005 or 

47 dB [m[micro]]V/m.

    (ii) Following transition, for stations in the LBS and UBS, the 

signal strength at any point along the licensee's GSA boundary must not 

exceed 47 dB[m[micro]]V/m. This field strength is to be measured at 1.5 

meters above the ground over the channel bandwidth (i.e., each 5.5 MHz 

channel for licensees that hold a full channel block, and for the 5.5 

MHz channel for licensees that hold individual channels).

    (iii) Following transition, for stations in the MBS, the signal 

strength at any point along the licensee's GSA boundary must not exceed 

-73.0 + 10log(X/6) dBW/m\2\, where X is the bandwidth in MHz of the 

channel.

    (b) Power flux density limit. For base and fixed stations operating 

in the 698-746 MHz band, with an effective radiated power (ERP) greater 

than 1 kW, the power flux density that would be produced by such 

stations through a combination of antenna height and vertical gain 

pattern must not exceed 3000 microwatts per square meter on the ground 

over the area extending to 1 km from the base of the antenna mounting 

structure.



[69 FR 5715, Feb. 6, 2004, as amended at 69 FR 72034, Dec. 10, 2004]



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