| 摘要 |
PURPOSE:To obtain an easy operation of a monitor, by automatically setting the voltage obtained by moving a zero point setting variable resistor and allowing the spectrum monitor to always start sweeping from its zero point even if a start point of the sweeping is changed. CONSTITUTION:When a zero point setting variable resistor 6 is held to zero potential and analog switches 4, 5 are turned on, output voltage can be kept at zero potential for any input signal to an operation amplifier 2. Here the turn-off operation of the analog switches 4, 5 simultaneously with the sweeping start of the input signal causes the output voltage to start sweeping from the zero point. |
