| 摘要 |
PURPOSE:To reduce measuring cost by providing a modulation circuit to modulate a low frequency flicker signal with display information, and flickering a flicker display light. CONSTITUTION:The receiver consists of a display device driver 6, a display device 7, a modulating circuit 8 modulating an inputted flicker signal (a) with display information (b) and outputting a modulation signal (c), a flicker driver 9 converting and outputting the modulation signal (c) into a flicker driving signal and a flicker display light 10 operated by a flicker driving signal or the like. The modulating circuit 8 receives a low frequency flicker signal (a) and display information (b) outputted individually from a decoder 5 and outputs the modulation signal (c) modulating the flicker signal (a) of a low frequency with the display information (b). The flicker driver 9 inputs the modulation signal and converts the flicker drive signal and outputs it. The flicker display light 10 uses a flicker driving signal to apply flickering. Thus, the measuring system is constituted inexpensively in the automatic sensitivity measurement of the receiver and the measurement cost is reduced. |
