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 dBµV/m.

   (2) 698-764 and 776-794 MHz bands: 40 dBµV/m.

   (3) The paired 1392-1395 MHz and 1432-1435 MHz bands and the unpaired
   1390-1392 MHz band (1.4 GHz band): 47 dBµV/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 [mµ]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[mµ]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]