MF (Medium Frequency) Broadcasting System Performance Model

摘要

An interactive program has been developed to evaluate the performance of MF broadcasting systems. The model calculates both ground-wave and sky-wave signals. The user can select from three ground-wave models; (1) smooth Earth, homogenous path, (2) smooth Earth, mixed path, and (3) irregular Earth, mixed path. The available sky-wave methods are: (1) FCC/Region 2, (2) CCIR, and (3) Wang. Three options are available for making the ground-wave and sky-wave predictions: (1) a point-to-point mode which allows the user to define all of the parameters and test the sensitivity of different parameters, (2) a point-to-point mode which compares the desired signal and interference signals at the reception point, and (3) an area mode which produces signal-to-interference or signal coverage plots. The program utilizes the characteristics of transmitting stations found in a Region 2 data base to make interference calculations. The program also incorporates a Region 2 ground conductivity data base, a Region 2 elevations data base, and a world-wide atmospheric noise data base.