| 摘要 |
In a CATV receiver or television receiver channel selecting apparatus provided with a controlling device wherein, on the basis of a channel-up or channel-down channel selecting operation, data corresponding to local oscillation frequencies of the respective channels are output, a tuning voltage is prepared by using these data and the local oscillation frequency of the tuner is controlled, the above mentioned controlling device is provided with a device for memorizing the information as to whether it is inhibited or permitted to select the respective channels at the time of the channel-up or channel-down channel selection so as to memorize the common channel selection inhibiting information for a plurality of channels not allowed to exist simultaneously and to be ablve to save the memory capacity of the memory (RAM) of the channel selecting microcomputer; and further, a device for quickly searching the input signal frequency of the channel without a mis-operation in the case of selecting an objective channel at the time of the up/down channel selection is provided.
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