INTERMD: A computer program to predict intermodulation product generation on two-way FM radio frequencies

A computer program which was developed at the Oak Ridge National Laboratory to perform calculations on groups of two-way FM radio frequency assignments to determine if interference might be generated when two or more of the networks are used at the same time is describe. Intermodulation products are generated in a variety of ways, but the results have the same effect: the radio frequency signal generated appears to the receiver as a signal that cannot be distinguished from a signal actually transmitted on the receiver's input frequency. The purpose of INTERMD, the computer program described here, is to enable rapid determination, by calculation, of possible frequency combinations which could cause interference.