SU788008A1 - Oscilloscopic meter of amplitude and time parameters of electric signals - Google Patents

Description

a signal whose output is connected to the input of an analog-digital converter, and the input is connected to the input terminal and the first input of the first switch, the output of which is connected to the input of a vertical deflection amplifier, the output connected to the vertical deflection plates of an EMF tube. In addition, the 8TOT meter is equipped with a memory unit and a BTOpbfNf switch, the first input of which is connected to the output of the first source of adjustable reference voltage, the second input to the output of the second source of adjustable reference voltage, the third input to the output of the sawtooth voltage generator, input control with the third output of the control unit, and the output with horizontally deflecting plates of the electron-beam tube, and the input

the memory unit is connected to the output of the strobe converter of the signal under study and the output is connected to the second input of the first switch.

The structural electrical circuit of the device is shown in the drawing,

The device consists of a generator 1 sawtooth voltage sweep, the first and second comparators 2, 3, the first and second sources 4 and 5 of the adjustable reference voltage, the meter 6 time intervals, control 7, the first switch 8, the amplifier 9 vertical deflection, elektronnuchevoy tube (CRT) 10, the second switch 11, the strobe converter

12 studied signal, memory block

13 and analog-to-digital converter (ADC) 14.

The device works as follows.

The sawtooth voltage is supplied to the first inputs of the -comparators 2, 3. The second inputs of the comparators 2, 3 are supplied with the disputable voltages of the sources 4, 5. At the moments of equality of the swept voltage and the reference voltages, pulses appear at the outputs of the comparators 2, 3 the time interval between which fixes with the meter 6, On the control unit 7 xsmandde, the second switch 11 for the time of the forward sweep connects the output of the sawtooth capital generator to the horizontal sweep of the CRT 10. On the KON- The raH de control unit 7 at the same time the first switch 8 connects the input terminal through the vertical deflection amplifier 9 to the vertical deflection plates of the ZLT 10, and the image of the signal under study is recorded on the RAP screen 10. The control unit 7 during the first forward sweep at the time the operation of the first comparator 2 triggers a strobe converter of the signal under study 12, which gates the signal under study and transforms its instantaneous value into the amplitude of the pulse, which is detected by the pulse 13 at a time equal to the sweep time, and converted by the DLC 14 into a digital code

During the first reverse sweep, the first switch 8, at the command of the control unit 7, connects the output of the memory unit 13 to the input of the vertical deflection amplifier 9. At the same time, the switch 11 connects to the horizontal deflection plates of the CRT 10 an adjustable voltage source 4. As a result, 31PT on the screen 10, a point is formed that corresponds to the time of gating of the measured signal along the time axis, and the instantaneous value of the signal at the gating point along the voltage axis.

During the Second Forward Sweep Stream, the signal under investigation is gated when the second comparator 3 triggers. The instantaneous value of the test signal is memorized and connected by the first switch 8 during the second sweep sweep. At this time, the second switch 11 connects to the horizontally deflecting plates the source voltage of the source 5. Then the cycle repeats. By changing the magnitude of the reference voltages of sources 4,5, it is possible to mix the formed points on the screen of a CRT 10.

When measuring the maximum of the signal, the maximum point is determined by the maximum vertical deviation of the point, and then the readout is taken from the digital indicator A11P 14. When measuring the front duration between the specified signal levels, for example, 0.1 and 0.9, the base and the vertical The pulses are aligned with the O and 1 levels of the CRT grid, and the points formed on the screen with the levels of 0.1 and 0.9, after which they take the count from the time interval meter 6.

Claims (2)

 Since the vertical position of the points is determined by the magnitude of the dc voltage, and the vertical path from the shunen can be (calibrated by dc with a high degree of accuracy, the device allows to increase the accuracy of setting the amplitude interval on the CRT screen, thanks to The measurement accuracy of the amplitude and time parameters of signals is improved. Formula of the Invention Oscillographic meter of amplitude and time parameters of electrical signals containing a sawtooth voltage generator. sweep output connected to the first inputs of the first and second comparators, the second inputs of which are connected to the first and second sources of adjustable reference voltage, and the outputs to the first and second Bhoamam time meter and control unit, the first output of which is connected to the control inputs 1 the first switch, and the second output - to the synchronization input of the strobe converter of the test signal, the output of which is connected to the input of the analog-digital converter, and the input to the input terminal and the first input The switch, the output of which is connected to the 7 8 input of the vertical power amplifier, trick associated with vertically deflecting plates and an electron beam tube, is characterized in that it is equipped with a memory unit and a second switch, the first input of which is connected to the output of the first source of adjustable reference voltage, the second input — with the output of the second source of adjustable reference voltage; the third input — with the output of the raververt sawtooth voltage generator; the control input — with tim output of the control unit and output - with horizontally deflecting electron tube plates, wherein the memory unit whith input connected to the output tup & of the signal converter, and the output - to the second input of the first to the mutator. Sources of information taken into account in the examination 1. Technical description of the oscilloscope type C1-40, USSR, 1974. 2. USSR author's certificate in application number 2149427/21, cl. Q 01 R 13/30, 1975.