Difference in measuring circuit parameters between a multimeter and an oscilloscope
As a result of the work required, I soldered circuit boards and debugging circuits when the multimeter and oscilloscope I have used, to be honest, I usually work when I feel the use of the multimeter than the use of oscilloscopes more than the opportunity to use the multimeter unless the multimeter can not be solved to solve the problem with the oscilloscope to solve the problem, I am generally equipped with two multimeters on hand, one for the analogue pointer, one for the digital type.
Analogue Pointer Multimeter
Analog pointer multimeter in some special occasions or very powerful, such as I often use the pointer multimeter to determine the absence of identification of the transistor is a PNP-type or NPN-type transistors, this time with the pointer multimeter to determine the positive and negative of the triode PN junction as well as the triode is in the degree of conduction is still very convenient; you can also use the pointer multimeter to determine the leakage of MOS tubes (D), the source of the electrode (S) and gate (G) polarity of the three polarity and its quality; we use the pointer multimeter
Digital Multimeter
Digital multimeter is known for its high accuracy, easy to read measurement values, and strong overload capacity, and I often use a digital multimeter when measuring voltage, current, and resistance on a circuit board. As the digital multimeter has a hold function when measuring voltage and current, it is very convenient for measuring readings. Therefore, when repairing and debugging circuit boards, they are often used in conjunction with each other according to their respective "strengths".
The main role of the oscilloscope
Just said the multimeter can undertake the work, we are talking about oscilloscopes. We give a less appropriate example, the multimeter is equivalent to the doctor often carry a stethoscope, which is easy to carry but limited to measure the voltage, current, resistance, transistor type and other limited functions; and oscilloscope is equivalent to the CT machine in the hospital, its powerful, any part of the human body can be examined, but the price is expensive. Then the oscilloscope used by our electronic repair technicians is similar to this instrument. In terms of oscilloscope type, there are generally two types, one is an analogue oscilloscope and the other is a digital oscilloscope. Their common feature is not only can measure the circuit voltage and current and can also measure the voltage or current waveform, phase, period and frequency and many other circuit board parameters. From this aspect of the oscilloscope's "skills" more versatile.
Especially in digital circuits when to capture the "fleeting" short signal, then this time the oscilloscope is a powerful assistant, its "capture" time up to milliseconds, "capture" frequency up to hundreds of times. "The frequency can be hundreds of megahertz.
