Digital oscilloscope generally provides online display of root mean square value, its accuracy is generally what?
For oscilloscope amplitude measurement accuracy, many people use A/D digit to measure. In fact, it varies depending on the oscilloscope bandwidth you use, the actual sampling rate Settings, and so on. If the bandwidth is insufficient, the amplitude measurement error itself will be very large; if the bandwidth is sufficient, the sampling setting is very high, and the actual amplitude measurement precision is not as good as that of the sampling rate when the sampling rate is low (you may refer to the user's manual of the oscilloscope, which may give the actual effective digits of an oscilloscope at different sampling rates). In general, oscilloscope measurement amplitude, including root mean square value accuracy is often less than the multimeter, similarly, measuring frequency it is less than the frequency counter.