testers and measuring instruments

Oscilloscope's the device intended for a research of amplitude and temporary parameters of the electric signal given on its entrance, directly on the screen or which's written down on the tape

Usual oscilloscope

 

Classification

Oscilloscopes can be divided into 3 groups:

continuing

storage
usual
digital
sampling

Structure



The oscilloscope with the display on the basis of the cathode ray tube consists of the following main parts:

Oscilloscope electron beam tube;

Block of horizontal development. It generates a periodic or single ramp which's given on plates of a horizontal deviation of the cathode ray tube. During the falling phase the impulse of electronic beam clearing which moves on the cathode ray tube modulator's also formed;

The entrance amplifier of the studied signal which exit's connected to plates of a vertical deviation of the cathode ray tube 

The oscilloscope has the screen A on which schedules of entrance signals're displayed. At digital oscilloscopes the image's output to the display in the form of the ready picture at other oscilloscopes electron beam tube with an electrostatic deviation's used as the screen. Marking in the form of a coordinate grid's usually applied on the screen

Oscilloscopes're divided on single- and multichannel

2 main modes of the scan used in the majority're:

automatic

waiting

Use 

It's the main device in radio electronics. Oscilloscopes're used in the applied, laboratory and research purposes for studying and measurement of electric signal parameters as directly and with various environments received at impact on the sensors transforming these influences to an electric signal or radio waves

There's a mode at which not ramp of scan but any signal given on a special entrance moves on plates of a horizontal deviation  in oscilloscope. If signals of close frequencies're applied to inputs ''X'' and ''Y'' of oscilloscope Lissajous figures can be seen. This method's widely used to compare the frequencies of different signals and to adjust a source under the frequency of the other

Lissajous figure's on the screen of 2-channel oscilloscope

Special oscilloscopes with the block of line allocation're applied for periodic and operating control of quality indicators of a television path and its separate links in the systems of telecasting

History

Electric oscillatory process was initially fixed manually on paper. The first attempts to automate record've been made by Jules Francois Joubert in 1880 who has offered a step automatic method of signal registration. Completely automatic device of Hospitale became development of Joubert's method. In 1885 the Russian physicist Robert Colley has created oscillometer and in 1893 the French physicist Andre Blonel has invented a magnetoelectric oscilloscope with bifilar suspension

Completely automatic device of Hospitale

Independent production of an oscilloscope, console for the television or the personal computer took place in practice of the qualified fans of radio electronics however this requirement isn't so relevant in view of mastered technology existence of mass production of the units which're executing functions of an oscilloscope and having at the same time low prime cost now

Many radio fans use a path of sound recording of the audio card installed in the computer as the input equipment for measurement of low frequencies the personal computer in addition requires the program



That's a using guide of oscilloscope connection