示波器的使用方法123（How to use the oscilloscope 123）.doc

示波器的使用方法123（How to use the oscilloscope 123） The use of oscilloscopes In the process of appliance maintenance, the use of oscilloscopes is very common. By oscillograph, we can observe the waveform of the circuit under observation, including shape, amplitude, frequency (phase) and phase, and compare the two waveforms, so that we can find the cause of the fault quickly and accurately. The correct and skillful use of oscillograph is a basic skill for novice maintenance personnel. Although the oscilloscope brand, model, variety, but its basic components and functions are very similar, this article describes the use of universal oscilloscope. Panel introduction 1. brightness and focus knob The brightness adjusting knob used to adjust brightness of the light (sometimes called oscilloscope brightness), should be used to make proper brightness, if too bright, easy to damage the tube. Focus adjustment knob for adjusting the focus ray (thickness), when used to clear graphics. 2. signal input channel The oscilloscope used for double oscillograph, has two input channels, respectively, channel 1 (CH1) and channel 2 (CH2), which are respectively connected with the oscilloscope probe, then the oscilloscope probe inserted into the ground, measured position measurement. 3. channel select key (vertical mode selection) A common oscilloscope has five channel select keys: (1) CH1: Channel 1 is shown separately; (2) CH2: Channel 2 is shown separately; (3) ALT: alternate display of two channels; (4) CHOP: two channel intermittent display, used for double scanning when scanning speed is slow; (5) ADD: signal superposition of two channels. For maintenance, select channel 1 or channel 2 for more. 4. vertical sensitivity adjustment knob Adjust the vertical deflection sensitivity, should be adjusted according to the amplitude of the input signal of the position of the knob, the knob is numerical instructions (such as 0.5V/div, said vertical direction of each grid amplitude is 0.5V) multiplied