| 摘要 |
PURPOSE:To prevent error recognition of signals by visual stereo sensation by displaying left and right-channel signals of a stereo signal and frequency spectra on CRT of a spectrum analyzer. CONSTITUTION:Left and right-channel signals L and R from input terminals 1 and 2 are applied to switch 5, which outputs selectively the mode of signal L+R, through amplifiers 3 and 4, and a signal extracted by this switch 5 is also supplied to BPF6 which performs frequency division by respective center frequencies and a fixed frequency. Through effective-value conversion part 7, the output of this BPF6 is applied to input terminals 81-8n of multiplexer 8, where it is divided into respective bands synchronizing with a signal from clock oscillator 11 before being supplied to CRT10, and a sweep signal from horizontal amplifier 13 is further applied to CRT10. Then, stereo signals L and R are displayed at the left end and right end of CRT10 while the frequency spectrum of each component is displayed in the middle, and during this display, a display part blanked is formed. |
