Analog oscilloscope working principle and function introduction
The oscilloscope can also be called a hand-held oscilloscope, which is easy to carry and easy to operate. It can convert electric signals that are invisible to the naked eye into visible images, making it easier for people to study the changing process of various electrical phenomena. What is the oscilloscope function? The principle of the oscilloscope is described below. Oscilloscope The oscilloscope can also be called a hand-held oscilloscope, which is easy to carry and easy to operate. It can convert electric signals that are invisible to the naked eye into visible images, making it easier for people to study the changing process of various electrical phenomena. The oscilloscope can observe waveforms of various signal amplitudes over time, and can also be used to test various power levels such as voltage, current, frequency, phase difference, and amplitude. Features Handheld digital oscilloscopes integrate digital storage oscilloscopes, digital multimeters, and digital frequency meters into a single unit. They use battery-powered, graphic LCD displays and are a new class of practical instruments in the field of electronic measurement. This design uses embedded design technology to embed core components such as microcontrollers, A/D converters, and LCD controllers in the system, and uses embedded operating systems, ASIC design technologies, LCD graphic display technologies, and digital signal processing technologies. Integrated design of embedded instrument systems. The instrument is full-featured, small in size and light in weight. It is very convenient to carry and operate. It has extremely high technical content, strong practicality and huge market potential. It represents a development trend of contemporary electronic measuring instruments. Principle analysis Analog oscilloscope working principle A traditional analog oscilloscope adds two electrical signals to be observed to the X and Y channels of the oscilloscope to control the deflection of the electron beam, so as to obtain a display waveform on the screen regarding the relationship between these two electrical signals. Obviously, such analog oscilloscopes are bulky, heavy, expensive, expensive, and less suitable for use in aperiodic, single-shot measurements. Digital oscilloscope working principle Modern digital storage oscilloscopes first perform high-speed sampling of analog signals to obtain corresponding digital data and store them. The digital signal processing technology is used to perform related processing and calculation on the digital signals obtained by sampling, so as to obtain the required various signal parameters (including the electrical parameters of some components that may need to be tested with a multimeter). The signal waveform is plotted according to the obtained signal parameters, and the measured signal can be analyzed in real time and transiently to facilitate the user to understand the signal quality and quickly and accurately diagnose the fault. At the beginning of the measurement, the operator can select the measurement type (waveform measurement, component measurement), measurement parameters (frequency/period, effective value, resistance value, diode on/off, etc.) and measurement range through the Chinese interface (optional automatic setting, The optimal range is set automatically by the instrument; the microprocessor automatically interprets the measurement setup to the sampling circuit and initiates data acquisition; after the acquisition is complete, the microprocessor processes the sampled data according to the measurement setup and extracts the required measurement parameters. And send the result to the display part. If needed, the user can select the automatic test mode: After the microprocessor analyzes the data obtained from the first sampling, the microprocessor will adjust and modify the measurement settings according to the specific conditions and re-sample. After several such "sample-analyze-adjust-resample" cycles, the oscilloscope can complete the touch-and-measuring function without manually reranging the range for easy hand-held operation. Obviously, digital storage oscilloscopes have many outstanding advantages over traditional analog oscilloscopes: ·Automatically determine and adjust the test conditions according to the characteristics of the signal under test, truly automatic, hands-off test. · Real-time capture of high-speed, transient signals can be achieved easily. • There are obvious advantages in waveform storage and operation. Performance Sets the functions of a digital storage oscilloscope, multimeter, and frequency meter; handheld; AC/DC power supply. Analog bandwidth 10MHz; Single bandwidth 5MHz; Sample rate 50MS/s. Record length 2KB; single channel. Scan horizontally 50ns/div~10s/div; vertical scan 5mV/div~5V/div. Measurement signal parameters: period, frequency, duty cycle, average, effective, peak-to-peak. Measuring resistance: 100, 1K, 10K, 100K, 1M. Measuring voltage: 10 mV, 30 mV, 1V, 3V, 10V, 30V. Diode measurement, continuity measurement. Frequency meter: 10MHz ± 5%. Measurement accuracy: oscilloscope accuracy ± 5%, multimeter accuracy ± 3%. Calibration signal: 1KHz/0.3V. LCD: 320 × 240 points 92mm × 72mm, adjustable contrast, with background light. Other: Battery power ≥ 2 hours, RS2. Application area 1. Electric energy; 2. Aerospace; 3, automotive electronics; 4, circuit design; 5, universities and colleges.
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