Oscilloscope is an inspection tool that is used in order to visualize and study of electrical impulses, as well as their parameters. With it, visual control is carried out many electrical signal characteristics such as shape, period and signal amplitude, polarity, duration of the signal.
The basic data are projected onto the display oscilloscope . The display located on the front panel, together with the control buttons and levers.
For ease of use all devices are equipped with display coated with a calibrated grid. Horizontal is the timeline «X», marked up in seconds, vertical - scale «Y» voltage marked up in volts.
Oscilloscopes are classified by a number of parameters
As a method of signal processing: digital and analog (conventional strobe).
According to the number of rays. Currently, there are single, dual-beam, etc. instruments. (N-beam oscilloscope has n signal inputs and can be displayed simultaneously on the screen graphics n input signals).
The main classes of oscilloscopes
Analog Oscilloscopes
The analog oscilloscope consists of the following components: an input divider, vertical amplifier, clock and horizontal deflection, a power source and a cathode ray tube. In analog oscilloscopes used cathode ray tubes
Digital oscilloscopes
Compared with analog predecessors, they have more opportunities. Digital oscilloscope includes an input divider of a normalizing amplifier, an analog-digital converter, storage unit, control unit and display unit. The display device usually is performed based on the liquid crystal panel.
How it works: the input signal after normalization is digitized and stored in memory. recording speed (the number of samples per second) is given by the control unit, and its upper limit is determined by the speed of the analog-digital converter, and the lower limit is theoretically not restricted, unlike analog oscilloscopes.
The complete digitization of the signal avoiding display signal in real time and therefore increase the stability of the image, save the results to organize, simplify scaling and stretching.
Using the display instead of the oscillographic tube makes it possible to display any additional information and control instrument in the menu.
Special types of oscilloscopes
At the present time there is a new class of oscilloscopes PC-based - virtual oscilloscope . Such a device can be an external device with a USB port or parallel input-output data, or additional internal device based on PCI or ISA cards. Software of any virtual oscilloscope enables complete control unit The advantages of this device - a high performance, small size, ease of use, low cost, data devices -. A worthy alternative to traditional digital storage oscilloscope.
Progress in the development of digital technologies has allowed conventional stationary digital oscilloscopes convert to portable oscilloscopes with great weight and size, and low power consumption.
And portable devices powered by batteries are not inferior to a stationary oscilloscope functionality and have a wide range of applications in various industries, service and research.
The use of oscilloscopes
One of the most important devices in electronics.
The use of the device greatly simplifies the configuration of most electronic devices, and its main task is considered to be the construction of the signal voltage U (t), referred to as "waveform".
They are used in applications, laboratory and research purposes, to monitor, study and measurement of electrical signals.
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