| 摘要 |
<p>The scanning unit has a control device (4) for controlling the amplitude of analog sampling signals (S1, S2) of the scanning unit, and a display unit (5) for indicating the amplitude of the analog sampling signals. The control device controls green and red light sources (51, 52) of the display unit based on changes e.g. interruption of illumination, in a luminous state of the light sources, where the successive changes of the luminous state of the light sources indicate information about the amplitude of the sampling signals.</p> |
