SU1387037A1 - Spectrum recorder - Google Patents

Abstract

The invention is intended to display spectra on a television indicator screen and can be applied in the field of scientific instrumentation to graphically display the dependence of two quantities presented in Cartesian coordinate system. The purpose of the invention is to simplify the spectrum recorder, which is achieved by introducing comparator 5, the inputs of which are connected to the output address of the vertical coordinate of the synchronizer 4 and the output of the buffer memory 2, and the output to the video input of the television indicator 1. Any spectrum point located within the screen of the television indicator 1 , is displayed only when the codes at the inputs of the comparator 5 match, i.e. the signal to the indicator video input arrives at that moment in time when the kinescope beam passes through a point on the screen surface located on the raster line, the code of which number is recorded in memory cell 2, the cell number being equal to the horizontal coordinate code of the spectrum point, and the vertical coordinate code of the same points equal to the contents of the memory cell. 1 il. with (L

Description

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The invention is intended to display spectra on a television indicator screen and can be applied in the field of scientific instrumentation to graphically display the dependence of two quantities, presented in Cartesian coordinate system.

The purpose of the invention is to simplify the spectrum recorder.

The drawing shows a functional diagram of the spectrum recorder.

The spectrum recorder contains a television indicator 1, a buffer memory 2, an address switch 3, a synchronizer 4, and a comparator 5.

The input of sync pulses of the television indicator 1 is connected to the output of sync pulses of synchronizer 4, the output address of the vertical coordinate of which is connected to the first information input of the comparator 5, the second information input of which is connected to the output of the buffer memory 2, and the output of the address of the horizontal coordinate synchronizer 4 is connected to the first information input of the address switch 3, the second information input of which is connected to the input 6 of the horizontal address ordinates, and the output - to the address input buffer memory 2, an information input of which is connected to the input of recorder 6. The recorder recording mode control input 7 is connected to the control inputs of the address switch 3 and the buffer memory 2.

The television indicator 1 is designed to display a spectrum and is a black-and-white or color video monitoring device. Buffer memory 2 is designed to store spectrum information and is a memory device, the number of cells in which is equal to the number of samples along the horizontal coordinate axis, and the capacity of each cell M is determined from the expression Y 2, where Y is the number of information lines on the television display screen 1, the resulting value of M being rounded to the nearest whole number. So, for Y 256.

The switch 3 of the address, using the signal from the write mode control input 7, connects to the address input of the buffer memory 2 horizontal coordinate addresses received from input 6.

In the reproduction mode, the signal at the recording mode control input 7 is absent and the address switch 3 connects the address input of memory 2 to the output of the address of the horizontal coordinate of the synchronizer 4.

Synchronizer 4 controls the operation of the spectrum recorder. The output address of the horizontal coordinate synchronizer indicates the current position of the beam

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on the raster line, and the output of the address of the vertical coordinate is the code of the raster line number on the screen of the television indicator 1, on which the beam is currently located, i.e. the information on the outputs of the vertical and horizontal coordinates identifies the location of the screen point at which the beam is currently located (or three beams when using the color television indicator 1).

Comparator 5 performs a one-to-one comparison of the codes arriving at its inputs. The signal at the output of the comparator appears in the case of equality of codes.

The spectrum recorder works as follows.

Consider his work on the example of one point of the spectrum, located in an arbitrary place on the screen of the television indicator 1.

Suppose you need to display on the screen a spectrum point having the horizontal coordinate code X 200 and the vertical coordinate code U 100. These codes for the corresponding buses come from a spectrum source (not shown) to input 6 of the write address. In this case, the horizontal coordinate code 200 arrives at the second input of the switch 3 address, and the vertical coordinate code 100 arrives at the input of the buffer memory 2.

After the signal at the recording mode control input 7, also coming from a spectrum source (not shown) appears, the address switch 3 connects the input with the horizontal coordinate code 200 to the address input of the buffer memory 2, which then writes the vertical coordinate code 100 into the memory cell tee having the number 200.

After the end of the signal at the input 7 of the write mode control, address codes of the horizontal coordinate from the synchronizer 4 begin to arrive at the address input of the buffer memory, and the buffer memory 2 continues to operate in read mode.

In this case, the codes recorded previously in the memory cells are sequentially read from the buffer memory and are fed to the second input of the comparator 5. In particular, when reading the cell number 200, the second input of the comparator 5 receives the code 100. The signal at the output of the comparator 5 appears only in the case when the first input also contains the code 100. Due to the fact that the input of the comparator 5 is fed to the vertical coordinate codes1 coming from the synchronizer 4, then the signal at the output of the comparator 5 appears at the moment of time when the beam on the indicator screen 1 is at the point 200 located on the raster line number 100, t. e. on the indicator screen, a spectrum point is displayed, having coordinates, Y 100.

Any point of the spectrum located within the screen of the television indicator is displayed only when the codes on the first and second inputs of the comparator 5 match. This means that the signal from the output of the comparator 5 enters the video input of the television indicator 1 at the time when the electron beam of the kinescope passes through a screen surface point located on the raster line, the code of the number of which is written in the cell of the buffer memory 2, the cell number being equal to the code of the horizontal coordinate of the spectrum point, and the code of the vertical coordinate Ata the same point equal to the contents of the memory cell.

Claims (1)

The claims of the Spectrum recorder, containing a buffer memory, an address switch and a synchronizer, the output of which clock pulses connected to the synchronous input of the television indicator, and the output of the address of the horizontal coordinate is connected to the first information input of the address switch, the second information input of which is the input of the recording address of the horizontal coordinate of the recorder, the output of the address switch connected to the address input of the buffer memory, the control inputs of the buffer memory These and address switches are the recorder recording mode control input, characterized in that, in order to simplify the recorder, it contains a comparator, the output of which connected to the video input of the television indicator, the first information input is connected to the output address of the vertical coordinate of the synchronizer, the second information input connects to the output of the buffer memory, the information input of which is connected to the input address of the recording of the horizontal coordinate of the recorder.