SU373632A1 - ELECTRONIC BEAM OSCILLOGRAPH WITH MECHANICAL SCAN 12 - Google Patents

Description

The invention relates to the field of instrumentation.

A mechanically scanned electron beam oscilloscope containing at least one electron beam tube, a photographic lens, a tape mechanism with a predominantly drum type cassette on which the recording medium is located, an optical system.

A disadvantage of the known devices of this type is the lack of the possibility of automatically matching the recording time (time of the open state of the CRT) with the time of one revolution of the drum cassette. Usually this process is carried out by changing the parameters of the time of the driver elements. This resulted in the loss of a certain amount of information.

To match the recording time and the rotational speed of the drum, to exclude information losses, the proposed oscilloscope is equipped with a switching body, for example, an inductive sensor, the elements of which are spaced ji are fastened respectively with a rotary cassette and a pedemix body, and the modulator of the CRT is connected A control unit, made on two trigger cells and in a match case, is one of the inputs and is connected to an inductive sensor.

FIG. 1 shows a block diagram of an on-line electron-beam oscilloscope, where / is an electron-beam tube (CRT), 2 is a photographic lens, 3 is a drum cassette with recording medium, 4, 5 are elements of an inductive sensor, 6 is a matching circuit of I. 7, 8 - cell triggers, 9 - key.

FIG. Figure 2 shows the pulse diagrams of the time management block.

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The oscilloscope works as follows. The image from the CRT screen through the lens 2 is projected onto the 3 recording media recorded on the drum cassette. The sweep is performed by thanking the drum cassette in a direction perpendicular to the direction of movement of the beam on the CRT screen. Before the start of registration, the entire scheme is reset to its initial state by clicking the reset button. After the required speed has been reached, the start three-ger 7 button is reset to operating status. The output potential of this trigger prepares the coincidence circuit 6. B moment of passage of the inductive sensor element 4 about the element 5 of the same sensor located on the cassette's root, a pulse is generated that arrives at the coincidence circuit 6. At the output of this circuit, a pulse is generated that translates

the trigger 8 is in the operating state, with the leading edge of the pulse of which the object to be investigated is launched.

The pulse itself is amplified and fed to the CRT modulator, ensuring the start of registration. After the drum cassette makes a full turn, a pulse is generated at the sensor input, which, after passing through the coincidence circuit 6, returns the trigger 8 to the initial state. The falling edge of the trigger pulse 8 returns the trigger 7 to the initial state, and a signal is removed from one of the inputs of the circuit 6, ensuring that the remaining pulses generated at the output of the sensor do not pass.

The subject of the invention is a mechanically scanned electron beam oscilloscope containing at least one electron beam tube, a photo lens, a tape mechanism with a predominantly drum type cassette on which the recording medium is located, an optical system, characterized in that rotation of the drum, excluding loss of information, it is equipped with a switching body, for example, an inductive sensor, the elements of which are spaced and fastened respectively with a rotating dc drum cartridge and the fixed body, and a modulator connected cathode-ray tube control unit adapted to trigger the two cells and a coincidence circuit, one input connected to the inductive sensor.

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