The difference between high voltage differential probe and low voltage differential probe

When using an oscilloscope to measure a signal, we need to make a preliminary judgment on the signal. The first is the strength of the signal and whether the signal is a ground signal. The second is the frequency at which the signal works. Oscilloscopes are usually equipped with a common single-ended probe, which is only suitable for ground signal measurement within 300V. When the signal is not on the ground, it is a cross-referenced floating ground signal, so a differential probe should be selected at this time.

Differential probes are usually divided into high-voltage differential probes and low-voltage differential probes. In fact, there is no dividing line between the two. The working principle of the two is the same. Each probe has several attenuation ratios to choose from. The attenuation of low-pressure differential probes is generally not more than 20 times, and that of high-pressure differential probes is generally not less than 50 times. As long as the appropriate attenuation ratio is selected, it will not have much impact on the test results.