| 摘要 |
PURPOSE:To enable to receive one of selected bilinguial broadcast with continuity, by outputting a detected output of identification signal continuously for a given time with a delay circuit, when an identification signal for bilingual broadcast is absent. CONSTITUTION:In receiving a bilingual broadcast, the identification signal of bilingual broadcast is detected at a bilingual broadcast identification circuit 3 to produce H level output, which is fed to a relay RL12 via a delay circuit as it is, allowing to activate the relay coil. Thus, the selector contact of the relay RL12 is selected to normally open, and the output of a manual switch S10 is picked up as eL, eR signals. Thus, in selecting the manual switch to the position A, the main signal em as Japanese broadcast is selected, and if selected to B, the subsignal es as English broadcast is selected. Thus, even if the identification signal is absent, for example, the English broadcast is not selected to Japanese broadcast, and one of selected bilingual broadcast can continuously be received. |
