SU1328761A1 - Method of obtaining time marks on the screen of cathode-ray tube - Google Patents

Abstract

A method for obtaining time stamps on a cathode ray tube (CRT) screen is implemented in a device comprising a stable frequency generator 1, a driver of 2 time stamps, a CRT 3, a divider 4 frequencies, a frequency multiplier 5 and a driver 6. The method is that 3, the electron beam is modulated with a signal of a stable frequency f, and the CRT 3 is started by pulses with a frequency f ,. obtained by dividing the frequency fg and n times and then multiplying the resulting frequency by k times, i.e. , -k / n and T Td-n / u, where n and k are integers that do not have common factors; T is the period following the triggering pulses; TO is the period following the marks. The method allows to reduce the interval between marks. I il. l

Description

one

This invention relates to a radio-noise technique and can be used to obtain time stamps on a screen of a cathode ray tube.

The purpose of the invention is to reduce the interval between time marks on the screen of a cathode ray tube (CRT).

The method consists in the fact that in a CRT the electron beam is modulated by a signal of a hundred

frequency, and the start of the CRT sweep is performed by pulses with a frequency f, obtained by dividing the frequency fd by n times and then multiplying the resulting frequency by

. f o k TO p

k times i f --- and T - where

P

p and k are integers that do not have common coin wrappers; T is the period of the following impulse starting; .T - the period of the following marks.

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it follows that there is always such a time interval, in which the periods T and TO are laid out a whole -fold, then the time positions of the start-up. The drawing shows a diagram of the fixed impulses and sequences

realizations that implement the method.

The device contains a master frequency generator 1 of a stable frequency, a driver of 2 time stamps, a CRT 3, a divider of 4 frequencies, a multiplier of 5 frequencies, a driver of 6,

The first output of the generator 1 through

a driver 2 is connected to vertically deflecting plates of a CRT 3. and a second generator input 1 through serially connected frequency divider A, a frequency multiplier 5 and a driver 6 are connected to horizontally deflecting plates of a CRT 3.

The device works as follows.

i When implementing a method for obtaining time stamps on a CRT screen, a signal from master oscillator 1 is applied to a driver 2 time stamps, the output of which is connected to the deflecting plates of a CRT. In addition, the signal of the master oscillator is fed to a frequency divider 4 with a division factor n, and then to a frequency multiplier 5 with a multiplication factor k.

From the transformed signal of the master oscillator, using a shaper 6, pulses are generated that trigger the scanning of the CRT 3.

At determined values of the frequency of the converted signal of the master oscillator, time marks will be observed on the CRT screen,

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marks relative to each other should be repeated periodically for each k trigger pulse,

Consequently, with a sufficient frequency of triggering pulses on the screen of the CRT 3, there will be a fixed image of a sequence of marks with an apparent time interval between the marks.

equal

-i

as increment

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45

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the time shift of the trigger pulses relative to the sequence of marks is the same from pulse to pulse and the temporal position of the sequence of marks relative to the start of the sweep is different with the arrival of each trigger pulse from the stack into k pulses. I,

The method of obtaining time stamps on a CRT screen can be used in various devices for time measurements and calibrations in the nanosecond range.

Claims (1)

Invention Formula The method of obtaining time marks on the screen of the cathode ray tube, which consists in modulating its electron beam with a mark signal received from a stable frequency generator, and dividing the indicated frequency the interval between them is much smaller than the image of the period they follow. It is possible to obtain the frequency f such that the pulses that trigger the EL1 3 sweep will have, with respect to the sequence of marks, time shifts increasing from pulse to pulse by the same amount, less than the period of cancellation. current. This will cause the position of the marks on the CRT 3 screen with the addition of each trigger pulse to change. Since the period of following of the starting pulses is associated with the period of following of the marks by the perception t-k HBH-T-k T p, from where it follows that there is always such a time-interval in which the period five marks relative to each other should be repeated periodically for each k trigger pulse, Consequently, with a sufficient frequency of triggering pulses on the screen of the CRT 3, there will be a fixed image of a sequence of marks with an apparent time interval between the marks. equal -i as increment the time shift of the trigger pulses relative to the sequence of marks is the same from pulse to pulse and the temporal position of the sequence of marks relative to the start of the sweep is different with the arrival of each trigger pulse from the stack into k pulses. , The method of obtaining time stamps on a CRT screen can be used in various devices for time measurements and calibrations in the nanosecond range. Invention Formula A method of obtaining time marks on the screen of a cathode ray tube, which consists in modulating its electron beam with a mark signal received from a stable frequency generator, and dividing the indicated frequency. 1328761 characterized in that, by a geyerator signal, afterwards, in order to reduce the interval between multiplying its frequency, and with coefficients, the sweep launch, the electron division and multiplication factors do not have The ray tube is produced by the above mentioned common factors. uh