As a community service, RFSignalman recently tested the  800MHz radio coverage  in the Elk Grove, CA.   The dots, on the following Google Map, are color coded to reflect a range of  signal levels. You can also zoom in and click on each dot to view the actual level measured at that point.  The outdoor measurement eliminates many of the variables and provides a good benchmark in estimating the amount of loss that can be introduced by your building before reaching the minimum acceptable level of -95dBm.

Outdoor Signal Level up to:

-70dBm = Green      (Good – allows the building owner minimum of 25dB for building loss)

-80dBm = Yellow     (Good/Marginal – allows the building owner 15-24dB of building loss)

-90dBm = Red          (Marginal/Bad – allows the building owner 5-15dB of building loss)

-95dBm – Light Blue (Bad – allows the building owner less than 5dB of building loss)

-100dBm – Blue        (Bad)

The measurments should not be considered a pass/fail indication, since every building is a little different, but it provides a good overview of outdoor radio coverage in Elk Grove and geographic areas that could potentially have issues with indoor coverage.