Simulation accuracy of any RF modeling program is dependent on many factors the most important being:
- Accuracy and resolution of the terrain, building, and clutter data
- Propagation model used
- Choice of time/location/margin values
- Physical characteristics of the study area (plains, mountains, urban, etc)
- Experience and skill of person using the tool
With a good physical propagation model (such as Anderson 2D) and careful attention to all the other factors, the standard deviation of error typically varies between 5 dB and 15 dB (measured data vs. predicted data) depending upon the physical characteristics of the environment. For example, a UHF signal prediction in an urban area will have a higher standard deviation whereas a VHF signal in a rural area will be lower error. The purpose of EDX software is to supply an accurate mapping tool with RF system database management, and a highly flexible and comprehensive set of industry-standard propagation path loss calculation methods (propagation models) so that an RF engineer can use the program along with his/her knowledge and experience to quickly do coverage predictions. EDX software is designed to efficiently perform calculations where the user already understands the strengths and weaknesses of the method employed. The software is a tool, and like any tool the results you get are dependent on the one who uses it.