The guide provides an overview of the basics of oscilloscopes. The concept of oscilloscopes and how to use them will be understood in detail. We will get you up to speed on the basic measurement and performance characteristics of an oscilloscope by discussing some of its applications. We will also introduce some of the different types of probes and discuss their advantages and disadvantages.

We live in the time domain. This is where we measure all digital performance. But sometimes, we can get to an answer faster by taking a detour through the frequency domain. With six principles, we can understand how an oscilloscope transforms time domain measurements into a frequency domain view. All six principles are applied “under the hood” by oscilloscopes with a Fast Fourier Transform (FFT) function.

Optical module eye diagram test is a common optical test method used to measure the performance of optical modules during high-speed data transmission signal transmission, and is usually used to test parameters such as transparency, transmission distance and off-line storage of optical modules. The eye diagram of an optical module is an interlaced diagram of the photoelectric displacement waveform over a period of time collected using an oscilloscope and other equipment during high-speed data transmission, which can reflect the quality of the data transmission signal and the interference of the circuit. The name of the eye diagram comes from the appearance of the image resembles an "eye" shape, so called eye diagram.

The main purpose of conducting optical module testing is to ensure that the performance of the optical module is reliable, meets the specification requirements, and can work stably in practical application scenarios, specifically including the following aspects: confirming the transmitting and receiving performance of the optical module: by testing the transmitting and receiving performance of the optical module, ensuring that it can transmit signals normally and guaranteeing the quality and reliability of data transmission.

Optical modules as more sensitive optical devices, often in the process of use will have many problems, for the more common problems of optical modules, have their corresponding test methods, such as visual inspection method to see the appearance, comparison method to measure the parameters to see the difference, replacement method to replace components to see the change in parameters, according to a certain bad condition to determine the fault circuit area, by hanging the structure of the optical module to determine the components of the fault, etc., then the specific What is the specific optical module testing process? Let's take a look!

A spectrum analyzer is an instrument used to measure the radiation spectrum of a luminous body, i.e., the index parameter of the luminous body itself. Spectral analysis is a qualitative analysis that identifies the presence of certain elements from their characteristic spectra, and the intensity of these spectral lines is related to the content of the element in the sample, so the intensity of these lines can be used to quantitatively determine the content of the element.

Digital oscilloscopes generally have a storage memory function, which can store the instantaneous signal waveform at any time during the measurement process, and can capture the moment of signal change for observation. Figure 2-29 for a typical digital oscilloscope machine structure. As can be seen from the figure, the digital oscilloscope is divided into two parts, the left part is the display part of the signal waveform and data, the right part is the control part of the oscilloscope, including the key knob area, probe connection area.

When considering the purchase of a new oscilloscope, users often ask many questions. For example, what kind of oscilloscope should be selected? How wide a bandwidth is needed? Can an analog oscilloscope meet the needs of the job? Another question people often ask is: "DSO can meet my work needs? "In other words, can the DSO do all the measurements I was doing with an analog oscilloscope?

Oscilloscope is a very wide range of electronic measuring instruments. It can transform the electrical signal invisible to the naked eye into a visible image, which facilitates people to study the change process of various electrical phenomena. The oscilloscope uses a narrow, high-speed electron beam composed of electrons, hitting the screen surface coated with fluorescent material, it can produce tiny dots of light (this is the traditional working principle of the analog oscilloscope).