According to the working modes, DC power supplies can be divided into the following categories-Controllable rectification, Chopping, Convertor DC stabilized power supplies.

AC stabilized voltage power supplies are also called AC voltage stabilizer. Most electronic equipment require stable AC power supplies and direct power supply from grid has not been able to meet the demand.

In 1968, SUIN has introduced JW-30B DC power supply. With our continuous research and development, now we are able to manufacture various models of programmable power supplies, such as SK10000, SK3323/3325, SK3303 and so on.

​As a kind of digital measurement instrument which has many applications. The digital multimeter has the function like ammeter, voltmeter, ohmmeter and others. Digital multimeter has many features in safety aspect.

Digital multimeter is a kind of digital measurement instrument which has many applications. The digital multimeter has the function like ammeter, voltmeter, ohmmeter and others.

​Compared with the traditional spectrum analyzer working principle, the most obvious change of modern sweep-frequency spectrum analyzer is AD sampling.