Oscilloscope and spectrum analyzer is not an instrument?
Oscilloscope is mainly to observe various signal amplitude changes with time waveform curve, but also can use it to test a variety of different power, such as voltage, current, frequency, phase difference, modulation amplitude and so on.The spectrum analyzer is used to measure the signal distortion, modulation, spectrum purity, frequency stability and intermodulation distortion
The spectrum analyzer is the instrument to study the signal spectrum structure, for the measurement of signal distortion, modulation, spectral purity and frequency stability and the intermodulation distortion signal parameters, can be used to measure some parameters such as amplifier and filter circuit system, electronic measuring instrument is a versatile. It can also be called frequency domain oscilloscope, tracking oscilloscope, analysis oscilloscope, harmonic analyzer, frequency analyzer or Fu Liye analyzer. Modern spectrum analyzer can display analysis results in analog or digital mode. It can analyze all radio frequency signals from VLF to sub millimeter band below 1 hz. If the digital circuit and microprocessor are used in the instrument, it has the function of storage and calculation, and it is easy to form an automatic test system with the standard interface.
Oscillograph is a kind of electronic measuring instrument with wide range of uses. It can transform the electrical signals invisible to the naked eye into visible images so that people can study the changing process of electrical phenomena. An oscilloscope uses a narrow, high velocity electron beam to hit a screen with a fluorescent material to produce tiny spots of light. Under the action of the measured signal, the electron beam is like a pen's pen tip. It can depict the instantaneous change curve of the measured signal on the screen surface. The oscillograph can observe the waveform curves of various signal amplitudes with time, and can also use it to test various electric quantities, such as voltage, current, frequency, phase difference, modulation amplitude and so on.
