| 摘要 |
PURPOSE:To select a specific channel of a CATV system by providing two input operation parts, two memories, and a memory selecting circuit, and selecting the 2nd memory when special operation is performed by the combination of those two input operation parts. CONSTITUTION:When a channel selection key for a desired channel CH is operated at an input operation part 1, a number corresponding to the CH is displayed on a display 2 on the basis of information from a controller 4 and then stored in the 1st memory 3 for general CH channel selection information storage under the command of the memory selecting circuit 9 to read tuning voltage information corresponding to the CH. This information is converted by a DA converter 5 into a tuning voltage, which is impressed to a terminal VT of a tuner 6 to receive a signal over the selected desired CH. When a special operation, is carried out at an input operation part 1-7 in combination, the specification of the circuit 9 is switched from the memory 3 to the 2nd memory 8 for specific CH channel selection information storage and tuning voltage information is read out of the memory 8 and converted by the converter 5 into a turning voltage, which is supplied to the tuner 6 to receive a signal over a specific CH. |
