| 摘要 |
PURPOSE:To attain switching without deteriorating the quality of reproduced pictures by providing a variable attenuator between an amplifier which amplifies signals from an antenna and a mixer which mixes the amplifier output with VTR signals. CONSTITUTION:In recording, the attenuation of attenuator 10 is minimized by adjusting to supply the output of distributor 3 to a VTR tuner and also to a tevevision turner by way of RF amplifier 8, attenuator 10, RT amplifier 9, and mixer 7. In reproduction, the attenuation of attenuator 10 is adjusted to its maximum to attenuate signals from antenna 1 and VTR signals only applied to terminal 6 are applied to the television tuner through mixer 7. |
