| 摘要 |
PURPOSE:To display effectively an output signal level of an amplifier from a small signal to a large signal by providing a variable resistor adjusting an input signal level and a switch mechanism interlocking therewith. CONSTITUTION:A signal level adjusting device 9 consists of the variable resistor 10 and the switch mechanism 11. When the attenuation of the variable resistor 10 is small, since a conductor 11a and a slider 11b are not connected, an output signal of an amplifier 2 is attenuated by resistors 6, 7 and inputted to an output display device main body 3. When the attenuation of the variable resistor 10 is large, the slider 11b is on the conductor 11a. Since the resistor 6 is short-circuited, the output of the amplifier 2 is inputted as it is to the display device main body 3 without being attenuated. Thus, the output signal level of the amplifier is displayed effectively from a small signal to a large signal.
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