(under subclass 37) Subject matter wherein (1) means are provided for changing the generated frequency of at least one of the beating oscillators from one frequency to another, usually over a range of frequencies, the change may be by discrete steps or continuous over the range, or (2) means are provided for changing the amplitude of the generated oscillations of at least one of the beating oscillators or for effecting a change in amplitude at some other point in the system, e.g., in the mixer circuit.
SEE OR SEARCH THIS CLASS, SUBCLASS:
1+, for oscillators which are automatically maintained on frequency by retuning means when the frequency drifts from the desired frequency, indented subclass 4 for search sweep of the oscillator, indented subclass 15 for amplitude compensated oscillator.
47, for plural oscillator systems wherein one oscillator varies the amplitude or frequency of another oscillator.
48, for plural oscillator systems wherein at least one oscillator has frequency adjusting means.
90, for magnetron type oscillators with frequency adjusting means. 109, for transistor oscillators with amplitude control.
177+, for oscillators in general with frequency adjusting means.
182+, for oscillators in general with amplitude adjusting means.
