Co-Site Analysis Model (COSAM) Validation
Merrill N. Lustgarten, D. J. Hughes · 1972
Measurements were made of numerous interactions at a typical co-site installation; results were compared with predictions made by the Cosite Analysis Model (COSAM). Tests involved six AM voice communications transceivers operating in the 225-400 MHz frequency range. Twenty five frequency assignments were tested, with three different desired signal levels. Types of interactions included adjacent signal, spurious responses, spurious emissions, receiver and transmitter intermodulation (2 and 3-signal mixes; 3rd, 5th and 7th orders). Close agreement between measurements and predictions was obtained. Confidence levels are presented.