Introduction of Oscilloscope Test Instrument

　　An oscilloscope is an electronic measuring instrument with a wide range of uses. It can transform invisible electrical signals into visible images, making it easier for people to study the changing processes of various electrical phenomena. The oscilloscope uses a narrow electron beam composed of high-speed electrons to hit a screen coated with fluorescent material to produce tiny spots of light. Under the action of the measured signal, the electron beam is like the tip of a pen, which can draw a curve of the instantaneous value of the measured signal on the screen. The oscilloscope can be used to observe the waveform curves of various signal amplitudes changing over time, and it can also be used to test various electrical quantities, such as voltage, current, frequency, phase difference, amplitude modulation, etc.

　　Taking digital oscilloscopes as an example, many users may know some traditional indicators of oscilloscopes. To truly understand digital oscilloscopes, you must have a deep insight into the true performance and quality of the product hidden behind the nominal indicators, just like many consumers often care about the number of pixels when buying digital cameras. In fact, in addition to this "number", there are many important indicators and even materials that need to be considered.

　　These parameters are very important in terms of scalability, the number of supported communication standards, test accuracy, dynamic range and demodulation bandwidth. Future base stations may evolve towards dual-mode and multi-mode, and many mobile phones already have multi-mode functions, such as GSM and WCDMA dual-mode mobile phones. In addition, with the emergence of technologies such as 3G and LTE, higher requirements are placed on instruments. Instruments with high test accuracy, large dynamic range and large demodulation bandwidth are very popular. Mobile communication technology is developing rapidly. At present, there is no large-scale commercial use of 3G in China, and LTE, as a follow-up technology of WCDMA and TD-SCDMA, is about to launch a prototype. Network operators may accelerate the introduction of new technologies, which is indeed a challenge for base station and terminal manufacturers: the test instruments they purchase now must have good scalability and can be easily upgraded to future technologies, so as to protect the manufacturer's investment to the greatest extent.

　　In addition, the bandwidth and sampling rate of the oscilloscope are common parameters of the oscilloscope. Due to the development of manufacturing and R&D technology, the bandwidth of the oscilloscope can be corrected and compensated. However, these corrections and compensations are not always good things. Some customers do not want to bring these technologies into the test. They need the original test data.

　　Electronic engineers are now more concerned about whether the instruments they choose can really solve the actual problems encountered in testing. LeCroy oscilloscopes are specially designed for "problem solving", which is specifically reflected in: the latest patented technology TriggerScan used in the 7Zi series oscilloscopes can capture abnormal signals through fast refresh, which is more than 20 times more efficient than traditional methods, which greatly improves the efficiency of engineers debugging circuits; long waveform acquisition and instrument response capabilities have always been contradictory oscilloscope performance indicators. Some manufacturers claim that their products can reach a storage depth of hundreds of megabytes or even gigabytes, but in fact, when users use so much memory, the response of the oscilloscope will become slower, and any simple operation such as vertical sensitivity adjustment will make users wait for a long time to see the results. LeCroy uses a specially optimized waveform processing algorithm in the 7Zi oscilloscope, which greatly improves the rapid response performance of the oscilloscope under deep memory operation conditions.