A wide-band microwave link for telemetering

The microwave link to be described operates in the 4-KMC frequency region and can be set up for any desired bandwidth between 40 to 250 megacycles. In its present state, the telemetering system uses a pulsed-frequency modulated carrier obtained by use of either a klystron or a voltage-tuneable magnetron. The receiver directly amplifies the carrier to a level of +27 DBM where it is amplitude limited and discriminated. This system has been used in the field since January 1955 and has proved to be quite reliable. Its use to date has been limited to measuring time intervals of 200 microseconds or less, and to faithfully reproducing pulse shapes requiring up to 250-mc bandwidth. The various components utilized to accomplish the desired transmitting and receiving functions in this portion of the microwave band will be described.