| 摘要 |
PURPOSE:To prevent erroneous reading of an inspection result by providing a display control means for changing a display mode of the first display element and the second display element in which the display mode is changed before and after a timer means detects a lapse of a regulating time. CONSTITUTION:A test broadcasting is transmitted from a broadcasting station, an emergency alarm broadcasting receiver is normally operated and a completion signal of a test signal is correctly received and then, the first memory circuit 11 is set, and an output thereof D goes to high level. When the outputs D, E go to 'high' level, an output H of a display control circuit 13 becomes an intermittent signal of one hertz of a high level and a low level and the first display element 20 flashes. When the output D goes to the high level, a timer circuit 18 starts a time counting operation and when an elapse of 24hr of a regulating time is detected, an output G goes to a high level, the third memory circuit 14 is set and the second display element 21 flashes. Thereby, erroneous reading of a test result can be prevented. |
