What are the Types of Digital Oscilloscope?
Digital oscilloscope has the unique advantages of waveform triggering, storage, display, measurement, waveform data analysis and processing, and its use is increasingly popular. It is an indispensable tool for designing, manufacturing and repairing electronic equipment. Digital oscilloscope generally support multi-level menu, can provide users with a variety of choices, a variety of analysis functions. Other oscilloscopes can provide storage for waveform storage and processing. In this article we are going to discuss about different types of digital oscilloscopes in detail.
As already discussed digital oscilloscope can be classified into:
Digital Storage Oscilloscope:
A traditional digital oscilloscope is called a digital storage oscilloscope (DSO). Its display usually relies on a raster screen rather than luminescent phosphors.
A digital storage oscilloscope (DSO) allows us to capture and observe events that may only occur once, called transients. Because waveform information exists in digital form, a series of stored binary values, it can be analyzed, archived, printed, and otherwise processed within the oscilloscope itself or within an external computer.
The waveform doesn't have to be continuous, it can be displayed even if the signal disappears. Unlike analog oscilloscopes, digital storage oscilloscopes offer permanent signal storage and extensive waveform processing. However, DSO generally do not have real-time intensity grading. Therefore, they cannot express signals of different strengths in real time signals.
Some of the subsystems that make up a digital storage oscilloscope are similar to those in an analog oscilloscope. However, the DSO contains additional data processing subsystems to collect and display data for the entire waveform.
Digital Phosphor Oscilloscope:
Digital phosphor oscilloscope (DPO) offer a new approach to oscilloscope construction. This architecture enables the DPO to provide unique acquisition and display capabilities to accurately reconstruct the signal. DSO uses serial processing architecture to capture, display and analyze signals.
The DPO architecture employs unique ASIC (application specific integrated circuit) hardware to acquire waveform images, providing high waveform capture rates for a higher level of signal visualization. This performance increases the probability of witnessing transient events that occur in digital systems, such as tiny pulses and transition errors.
Digital Sampling Oscilloscope:
When measuring high frequency signals, the oscilloscope may not be able to collect enough samples in one sweep. A digital sampling oscilloscope is an ideal tool for accurately capturing signals whose frequency content is much greater than the oscilloscope's sample rate.
This type of oscilloscope can measure signals an order of magnitude faster than any other oscilloscope. For repetitive signals, it can achieve ten times higher bandwidth and high-speed timing than other oscilloscopes. Time-series isochronous sampling oscilloscopes have bandwidths up to 50 GHz. Compared with the structure of digital storage and digital phosphor oscilloscope, the structure of digital sampling oscilloscope reverses the position of amplifier and sampling bridge.
