Importance

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Abstract

Channel selecting apparatus for use with a signal receiver coupled to a first tuning device and a signal recorder coupled to a second tuning device is operable to tune the first and second tuning devices to preselected channels for receiving broadcast frequencies. In one embodiment, the signal receiver is a television receiver including a video display, and the signal recorder is a video tape recorder (VTR). Selectively operable channel selectors, common to the first and second tuning devices supply channel selector signals to determine the tuning condition of both tuning devices. When the VTR is actuated, a locking circuit locks the second tuning device to the tuning condition determined immediately prior to such actuation regardless of a subsequent difference in the channel selector signals. The locking circuit in the absence of the actuation of the VTR, enables the tuning condition of the second tuning device, as well as that of the first tuning device, to be determined by the channel selector signals. A switching circuit has first and second inputs coupled to the first and second tuning devices, respectively, to receive the channels to which the first and second tuning devices are tuned, and an output coupled to the television receiver. The switching circuit, when the VTR is unactuated, connects the output of the switching circuit to the second input thereof. When the VTR is actuated, the switching circuit connects the output thereof to its first input.

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First Claim