subject: Learn Something about Digital Oscilloscope [print this page] Learn Something about Digital Oscilloscope
There are many types of oscilloscope. The functions of them are not the same. In this article will explain how the digital oscilloscope works.
There are some differences between digital oscilloscope and analog oscilloscope. Digital oscilloscope has unique features like waveform triggering, storage, display, measurement, waveform data analyzing and processing and so on. The waveform of it is displayed and digitalized. It only repeats the process until it is finished. Some digital oscilloscopes selects the number of the sample stored in memory per acquisition, for example digital storage oscilloscope, which is short for DSO.
When in the triggering events, digital oscilloscope will get acquisitions. Once it identified the triggering events, it will store the information and display the waveform. There are two ways of digital oscilloscope in capturing the wave. It can capture the wave in a real-time, or capture the wave by single shot. The two techniques results in the footage captured of a triggering event.
The bandwidth of digital oscilloscope can be divided into virtual and digital real-time. For repetitive signals using sequential sampling or random sampling techniques, which can achieve a maximum bandwidth that is the real-time one. Virtual bandwidth is only suitable for repeated measurement of periodic signals, while the other one is suitable for signals and single signal measurement. By using an alternative method of equivalent time sampling, a digital storage oscilloscope can capture accurately the signs to the corner of the tape.
The maximum of most samples are not to a time base. At low scan rate determined, the digital storage oscilloscope is shot much more than its bandwidth. So we can use the DSO in several acquisitions modes. The DSO will not only remove the rest of the shots but also use them to analyze the signals coming.
