FNIRSI DSO-TC3 combines a digital oscilloscope, electronic component tester, signal generator, continuity test, voltage test, temperature and humidity measurement, infrared decoding and other functions are skillfully integrated. It is equipped with a 2.4-inch color TFT display, built-in rechargeable lithium battery, brings users stronger and more practical functions with good portability. FNIRSI DSO-TC3 is an upgraded version of DSO-TC2. On the basis of DSO-TC2, it has upgraded capacitance ESR detection, function signal generator output, oscilloscope bandwidth and sampling rate improvement, input voltage and diode detection range increase and so on. The improvement in performance and function of DSO-TC3 makes the device more stable and accurate in the detection process.