Parametric Converter Performance on a Beyond-the-Horizon Microwave Link

Experimental parametric converters were installed on a quadruple-diversity link of the White Alice system. Two parametric receivers with noise figures of 1.5 db were operated simultaneously with two normal receivers of 8.8-db noise figures. Comparative measurements showed improvements of 7 db in telephone-channel noise and 10-fold in teletype error-rates.