The important role of signal generator

Many test instruments are common to see in our life,such as Spectrum Analyzer.In the meantime,do you know how to choose the Digital multimeters.

1. Pointer table reading accuracy is poor, but the process of pointer swing more intuitive, and its swing speed range can be more objectively reflect the size of the measured.

2 pointer table generally have two batteries, a low voltage of 1.5V, a high voltage is 9V or 15V, the black pen relative to the red pen is positive.

3 in the voltage file, pointer table resistance relative to the digital table is relatively small, the measurement accuracy is poor

In short, in the relatively high current and high voltage analog circuit measurement pointer table, such as television, audio amplifier