Oscilloscope Common Faults and Solutions - 光宇拉线 Encoder
First, the oscilloscope can not start? First check the power cord, power strip is intact, check the power switch is fully open. Use the fan to determine if the machine is powered on. If everything is normal but the oscilloscope still does not start, please contact the aftermarket.
Second, when the signal is collected, the signal waveform does not appear on the screen. 1. Check whether the probe is properly connected to the signal connection line. 2. Check if the signal cable is properly connected to the BNC (channel connector). 3. Check whether the probe is normally connected with the object to be tested. 4. Check whether the signal of the object to be tested has been generated (the channel with the signal can be connected to the channel with the problem to determine the problem). 5, then re-collect the signal again. 6, the trigger mode is set to what state.
Third, there is a waveform display, but can not be stabilized 1. Check whether the signal source channel of the trigger panel matches the signal channel actually used. 2. Manually adjust the LEVEL trigger knob to see if the waveform is stable. 3. Use AUTO to automatically adjust the waveform to see if the waveform is stable. 4, adjust the time base to exclude false wave interference.
Fourth, the oscilloscope measurement amplitude is not allowed 1, check the unit of the source amplitude, the oscilloscope's automatic measurement of the amplitude of Vpp, the difference between the highest and lowest value. Users are often confused with Vrms, which is a valid value. For example, we often say that the mains electricity is 220Vrms, but its Vpp exceeds 600V. 2. The oscilloscope is not an accurate measurement tool. There is a certain amount of quantization error on the vertical axis according to the number of bits used.
Fifth, the use of observation of high-frequency signal distortion 1, the measurement signal is closer to the oscilloscope bandwidth on the line, the greater the distortion, usually with a bandwidth ≥ 5 times the signal bandwidth of the oscilloscope to measure can get a very small signal distortion. 2. Improper selection of oscilloscope probe will lead to distortion of the waveform seen. First, the probe bandwidth is greater than the signal bandwidth, and the best is ≥5 times the signal bandwidth. Second, if the probe is divided into two gears, the bandwidth of the two gears Differently, the 1X gear bandwidth is usually 6MHz-10MHz, and the 10X gear is the maximum bandwidth of the probe specification.
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