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The signal generator is a device that can provide various frequencies, waveforms, and output levels of electrical signals.

Digital multimeters are essential tools for anyone working in electronics, electrical engineering, or any field that requires accurate measurement of electrical signals.

Adjacent channel power, as the name suggests, measures the power of the left and right channels (also known as upper and lower channels) adjacent to the transmitter's working channel.

Stopwatch and timer calibrations are perhaps the most common calibrations performed in the field of time and frequency metrology.

Frequency measurement plays a very important role in the field of electronic engineering. Whether in communication systems, power systems, or other fields, accurate measurement of the frequency of signals is essential.

?In the electricity experiment, sometimes we need more current or voltage power supply, in this condition, several power supplies can be parallel or serial connected to realize this function.