Receiver arrangement
AssigneePlessey Handel und Investments AG
InventorTapan K. Das
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Abstract
This application describes a receiver in which channel selection is controlled by a frequency synthesizer a sweep of available channels is made by a channel selecting arrangement and this sweep is arranged to be stopped when a signal is received. When the sweeping is stopped a fine tuning arrangement takes control to respond to the frequency of the received signal and to compensate for any drift of that signal.
Claims18
A receiver comprising a frequency synthesizer controlled channel selection means which includes a controllable oscillator having a frequency and providing an output signal, dividing means including an adjustable divider for dividing the output signal to obtain a divided output signal, a reference signal source for providing a reference signal, a comparator for comparing the reference signal with the divided output signal and for providing a control signal to control the controllable oscillator, fine tuning means for fine tuning the frequency of the controllable oscillator, means for initiating a sweep of available channels by the channel selection means, means for stopping the sweep on reception of a signal by said receiver on one of the available channels, and control means operable on cessation of sweeping and responsive to the frequency of the signal for controlling the fine tuning means to compensate for frequency drift of the signal.
Dependencies are inferred from the claim text.