(under subclass 1) Subject matter wherein means are provided, in addition to the A.F.S. loop, for varying the oscillator frequency through a range of frequencies. The systems classified herein are chiefly directed to means for restoring A.F.S. control wherein such control is lost due to the fact that the oscillator frequency for some reason, such as during "warm-up" or some other disturbance, lies outside the "capture" range of the frequency discriminator, the sweep range of frequencies includes the "capture" range of the discriminator and serves to bring the oscillator frequency within the "capture" range and thereby render the A.F.S. effective.
SEE OR SEARCH THIS CLASS, SUBCLASS:
23+, for oscillators wherein low frequency modulation of the generated oscillations is utilized for A.F.S., signals representative of the frequency modulated oscillations being compared with signals of the modulating source.
106, for oscillator systems of the periodic amplitude and frequency varying type.
178, for oscillators in general provided with cyclic frequency sweeping means.
