RU2071062C1 - Oscillograph - Google Patents

Abstract

FIELD: radiometric devices. SUBSTANCE: oscillograph has voltmeter 5, deflection unit 1, cathode-ray tube 2, sweep unit 3, stroboscopic converter 7, delay line 8, synchronizing unit 4 whose input is connected with synchronization busbar, and output of synchronizing unit 4 is connected with inputs of delay line 8 and sweep unit 3. The first and second inputs of stroboscopic converter 7 are connected with outputs of delay line 8 and deflection unit 1, respectively. Input of deflection unit 1 is connected with busbar of measured signal. Novelty in the oscillograph consists in availability of integrator 6 whose input is connected with output of stroboscopic converter 7. Output of integrator 6 is connected with input of voltmeter 5 and with the second input of deflection unit 1. In this case, outputs of sweep unit 3 and deflection unit 1 are connected with the first and second inputs of cathode-ray tube 2. EFFECT: higher accuracy and simplified measurement procedure. 4 dwg

Description

 The invention relates to radio measurement technology and can be used in oscillography.

 Oscilloscopes are known [1,2] However, these devices are characterized by high complexity and low measurement accuracy, which is due to the error of the visual reference and the nonlinearity of the vertical deviation.

 The closest technical solution to the invention is an oscilloscope [3] containing the first and second switches, a cathode ray tube, a scan unit, a synchronization unit, first and second stroboscopic converters, a delay line, a voltmeter and a deviation unit, the input of which is connected to the measured signal bus, and the output of the deviation unit is connected to the first input of the first switch and the second input of the first stroboscopic converter, the output of which is connected to the input of the voltmeter and the third input of the first switch , the output of the first switch is connected to the second input of the cathode ray tube, and the second inputs of the first and second switches are connected to the second output of the scan unit, the synchronization bus is connected to the input of the synchronization unit, the output of which is connected to the inputs of the scan unit and the delay line, the output of the delay line is connected with the first inputs of the first and second stroboscopic converters, the first output of the scan unit is connected to the first input of the second switch and the second input of the second stroboscopic converter ator, the output of the second strobe transmitter connected to the third input of the second switch, whose output is connected to a first input of a cathode ray tube. When the oscilloscope is operating, the oscillogram of the signal under investigation and the brightness mark on the waveform line are reproduced on its screen. The value of the measured signal at the point indicated by the brightness mark on the waveform is determined by dividing the voltmeter readings by the gain coefficient k of the deviation unit. However, the prototype has limited measurement accuracy and a complex measurement procedure.

 The purpose of the invention is to increase accuracy and simplify the measurement procedure.

 The goal is achieved by the fact that an oscilloscope containing a voltmeter, a deviation unit, a cathode ray tube, a scan unit, a stroboscopic converter, a delay line and a synchronization unit, the input of which is connected to the synchronization bus, and the output of the synchronization unit is connected to the inputs of the delay line and the scan unit , the first and second inputs of the stroboscopic converter are connected to the outputs of the delay line and the deviation unit, respectively, and the input of the deviation unit is connected to the bus of the measured signal, an integrator is introduced, the input of the cat It is connected to the output of the stroboscopic converter, the integrator output is connected to the input of the voltmeter and the second input of the deflection unit, the outputs of the scan unit and the deflection unit connected to the first and second inputs of the cathode ray tube, respectively.

 In FIG. 1 shows a block diagram of an oscilloscope; in FIG. 2-4 images on the oscilloscope screen. In the drawings, the following notations are accepted: 1 deviation unit; 2 cathode ray tube; 3 scanner; 4 block synchronization; 5 - voltmeter; 6 integrator; 7 stroboscopic converter; 8 delay line; 9 bus measured signal; 10 bus synchronization; 11 - central horizontal risk; 12, 13 and 14 waveforms.

где U₅ cигнал на входе интегратора 6; Т период следования импульсов, поступающих с шины 9 измеряемого сигнала; t время. Сигнал с выхода интегратора 6 поступает на вход вольтметра 5 и второй вход блока 1 отклонения. Импульсы, поступившие с шины 9 измеряемого сигнала, усиливаются блоком 1 отклонения и поступают на второй вход электронно-лучевой трубки 2, на первый вход которой с выхода блока 3 развертки поступают пилообразные импульсы развертки. В результате на экране электронно-лучевой трубки 2 формируется осциллограмма 12 импульса. В момент t₁ времени с выхода линии 8 задержки на первый вход стробоскопического преобразователя 7 поступает импульс, что вызывает удержание на выходе стробоскопического преобразователя 7 напряжения, которое имелось на втором входе стробоскопического преобразователя 7. При поступлении в момент времени t₁ на первый и второй входы блока 1 отклонения разных по значению сигналов, равных соответственно U₁ и U₂, в интервале после момента t₁ и до момента времени t₁ + Т на выходе стробоскопического преобразователя 7 будет удерживаться сигнал, равный величине k(U₁ U₂). Согласно формуле (2), если на входе интегратора 6 в течение времени Т от момента времени t₁ до момента времени t₁ + Т поддерживается сигнал, равный k(U₁ U₂), то в момент времени t₁ + Т сигнал на выходе интегратора 6 изменится на величину U₁ U₂. В момент времени t₁ cигнал на выходе интегратора 6 равен U₂; в момент времени t₁ + Т сигнал на выходе интегратора 6 изменился на величину U₁ U₂ и стал равным U₁. Учитывая, что период следования измеряемых импульсов равен Т, в моменты времени t₁ + NТ cигнал, поступающий на первый вход блока 1 отклонения, равен U₁; N целое положительное число; N > 0. В момент времени t₁ + Т сигналы на первом и втором входах блока 1 отклонения равны U₁, а сигнал на выходе блока 1 отклонения равен нулю. После прихода в момент времени t₁ + Т импульса на первый вход стробоскопического преобразователя 7 сигнал на выходе стробоскопического преобразователя 7 станет равным нулю. При нулевом сигнале на входе интегратора 6 сигнал на его выходе, согласно формуле (2), не изменяется и остается равным значению U₁, которое измеряется вольтметром 5. В моменты времени t₁ + NТ cигнал на выходе блока 1 отклонения равен нулю, поэтому осциллограмма 12 измеряемого сигнала в моменты времени t₁ + NТ будет пересекать центральную горизонтальную риску 11. Для измерения амплитуды измеряемого импульса следует изменением задержки линии 8 задержки совместить сначала основание осциллограммы 12 импульса с центральной горизонтальной риской 11 (фиг.2), произвести отсчет показаний А_о вольтметра 5, затем изменением задержки линии 8 задержки совместить вершину осциллограммы 13 импульса с центральной горизонтальной риской 11 (фиг.3), произвести отсчет показаний А_m вольтметра 5; амплитуда измеряемого импульса равна А_m А_о. Для измерения длительности измеряемого импульса на уровне 0,5 от амплитуды импульса следует изменением задержки линии 8 задержки показания вольтметра 5 установить равными (А_m + А_о)/2, при этом осциллограмма 14 на уровне половины амплитуды совместится с центральной горизонтальной риской 11, по делениям на которой производится отсчет искомой длительности.The oscilloscope operates as follows. From the bus 9 of the measured signal, the measured pulses are fed to the first input of the deviation unit 1. The signal U ₃ at the output of the deviation unit 1 is determined by the formula
U ₃ k • (U ₁ U ₂ ), (1)
where U ₁ and U _{2 the} values of the signals, respectively, at the first and second inputs of the unit 1 deviations; k gain of the deviation unit 1. The signal from the output of the deviation unit 1 is fed to the second inputs of the cathode ray tube 2 and the stroboscopic converter 7. From the synchronization bus 10, either synchronizing pulses or measured pulses are input to the synchronization block 4. Block 4 synchronization generates pulses of synchronization, which from the output of block 4 synchronization are fed to the inputs of block 3 scan and line 8 delay. When a synchronization pulse arrives at the input of the sweep unit 3, a sawtooth-shaped sweep pulse is generated at its output, which arrives at the first input of the cathode ray tube 2. The delay line 8 delays the synchronization pulses received at its input. The pulses from the output of the delay line 8 are fed to the first input of the stroboscopic converter 7. After each pulse received at the first input of the stroboscopic converter 7, the signal that was at the second input at the time the pulse arrived at the first input is held at its output. The signal from the output of the stroboscopic converter 7 is fed to the input of the integrator 6. The signal U ₄ at the output of the integrator 6 is

where U _{5 the} signal at the input of the integrator 6; T is the repetition period of the pulses coming from the bus 9 of the measured signal; t time. The signal from the output of the integrator 6 is fed to the input of the voltmeter 5 and the second input of the deviation unit 1. The pulses received from the bus 9 of the measured signal are amplified by the deviation unit 1 and fed to the second input of the cathode ray tube 2, to the first input of which the sawtooth pulses of the scan arrive from the output of the scan unit 3. As a result, a waveform 12 of the pulse is formed on the screen of the cathode ray tube 2. At time t ₁ , a pulse is received from the output of the delay line 8 to the first input of the stroboscopic converter 7, which causes the output of the stroboscopic converter 7 to hold the voltage that was present at the second input of the stroboscopic converter 7. When the first and second inputs are received at time t ₁ unit 1 deviations of different values of signals, respectively, equal to U ₁ and U ₂ , in the interval after time t ₁ and up to time t ₁ + T at the output of the stroboscopic transducer 7 will be held signal equal to value k (U ₁ U ₂ ). According to formula (2), if a signal equal to k (U ₁ U ₂ ) is maintained at the input of the integrator 6 during time T from time t ₁ to time t ₁ + T, then at time t ₁ + T the output signal integrator 6 will change by the value of U ₁ U ₂ . At time t _{1 the} signal at the output of the integrator 6 is equal to U ₂ ; at time t ₁ + T, the signal at the output of the integrator 6 changed by the value of U ₁ U ₂ and became equal to U ₁ . Given that the period of the measured pulses is equal to T, at time t ₁ + NT the signal arriving at the first input of the deviation unit 1 is equal to U ₁ ; N is a positive integer; N> 0. At time t ₁ + T, the signals at the first and second inputs of deviation block 1 are equal to U ₁ , and the signal at the output of deviation block 1 is zero. After the arrival at time t ₁ + T of the pulse at the first input of the stroboscopic transducer 7, the signal at the output of the stroboscopic transducer 7 will become equal to zero. When the signal at the input of the integrator 6 is zero, the signal at its output, according to formula (2), does not change and remains equal to the value of U ₁ , which is measured with a voltmeter 5. At times t ₁ + NT, the signal at the output of the deviation unit 1 is zero, therefore, the oscillogram 12 of the measured signal at times t ₁ + NT will cross the central horizontal risk 11. To measure the amplitude of the measured pulse, first change the delay of the delay line 8 by first combining the base of the waveform 12 of the pulse with the central horizontal risk 11 (Fig. 2), read the readings A _{about the} voltmeter 5, then change the delay of the delay line 8 to align the peak of the waveform 13 of the pulse with the central horizontal risk 11 (Fig. 3), read the readings A _{m from the} voltmeter 5; the amplitude of the measured pulse is equal to A _m A _about . To measure the duration of the measured pulse at a level of 0.5 of the pulse amplitude, by changing the delay of the delay line 8, the voltmeter 5 readings should be set equal to (А _m + А _о ) / 2, while the waveform 14 at half the amplitude will be aligned with the central horizontal risk 11, divisions on which the desired duration is counted.

сигнал на выходе интегратора 6 отличается от U₁ не более чем на 0,014% поэтому после поступления шестого импульса на первый вход стробоскопического преобразователя 7 сигнал на выходе интегратора 6 практически не меняется и остается практически равным U₁, причем вольтметр 5 будет индицировать напряжение U₁. При использовании прототипа погрешность контроля коэффициента усиления блока 1 отклонения непосредственно отражается на погрешности измерений.Improving the accuracy of the measurements by the claimed device is due to the decrease in the influence of the error of control of the gain of the deviation unit 1 on the measurement error, which is explained as follows. Due to the limited accuracy of measuring the gain k of the deviation unit 1, the signal U ₃ at its output, instead of expression (1), will be determined by the formula
U ₃ k (U ₁ U ₂ ) / (1 + g), (3)
where U ₁ and U _{2 the} values of the signals, respectively, at the first and second inputs of the unit 1 deviations; k the measured value of the gain of the block 1 deviation obtained during its control; g relative measurement error of the gain coefficient k of the deviation unit 1; -0.05 <g <+0.05. When signals U ₁ and U _2, respectively, are received at the first and second inputs of the deviation unit 1 at the moment the first pulse arrives at the first input of the stroboscopic transducer 7, a signal k (U ₁ U ₂ ) / ( 1 + g). When the initial signal at the output of the integrator 6 is equal to U ₂ and the signal k (U ₁ U ₂ ) / (1 + g) is received at the input of the integrator 6 during the time T, the signal at the output of the integrator 6, according to expression (2), from the original U ₂ values are measured by the value (U ₁ U ₂ ) / (1 + g) and takes the value U ₁ (U ₁ - U ₂ ) G, where G g / (1 + g). We show by mathematical induction that when the Nth pulse arrives at the first input of the stroboscopic converter 7, the signal at the output of the integrator 6 is equal to U ₁ (U ₁ U ₂ ) G ^N-1 . It is shown above that for N = 1 and N = 2, the signal at the output of the integrator 6 is respectively U ₁ (U ₁ U ₂ ) G ^o U ₂ and U ₁ (U ₁ U ₂ ) G ¹ . Next, we show that if, when an N-1 pulse arrives at the first input of the stroboscopic converter 7, the signal at the output of the integrator 6 is U ₁ (U ₁ U ₂ ) G ^N-2 , then when the N-th pulse arrives at the first input of the stroboscopic converter 7, the signal at the output of the integrator 6 will be equal to U ₁ (U ₁ U ₂ ) G ^N-1 . When applying to the first and second inputs of unit 1, the deviations of the signals are U ₁ and U ₁ (U ₁ U ₂ ) G ^N-2, respectively, at the time of the pulse number N-1 at the first input of the stroboscopic converter 7, then, taking into account (3), at the output of the stroboscopic converter 7, a signal k (U ₁ U ₂ ) G ^N-2 / (1 + g) will be held for a time T. If there is a signal U ₁ (U ₁ U ₂ ) G ^N-2 at the output of the integrator 6 and a signal k (U ₁ - U ₂ ) G ^N-2 / (1 + g) is applied to the input over time T, then the signal the output will change by the value of (U ₁ U ₂ ) G ^N-2 / (1 + g) and become equal to U ₁ - (U ₁ U ₂ ) G ^N-1 , as required. For N ≥ 6 for

the signal at the output of the integrator 6 differs from U _{1 by} no more than 0.014% therefore, after the sixth pulse arrives at the first input of the stroboscopic converter 7, the signal at the output of the integrator 6 practically does not change and remains almost equal to U ₁ , and the voltmeter 5 will indicate the voltage U ₁ . When using the prototype, the error of control of the gain of the deviation unit 1 directly affects the measurement error.

означает произведение значений W(U₁; U_2;n-1) от n 1 до n N; для n 1 имеем W(U₁; U_2;0) 1; для 2 ≅ n ≅ N значение U_2;n-1 означает величину сигнала на выходе интегратора 6 непосредственно после поступления на первый вход стробоскопического преобразователя 7 импульса номер n-1; W(U₁; U_2;n-1) величина нелинейности передаточной характеристики блока 1 отклонения при подаче на его первый и второй входы сигналов соответственно U₁ и U_2;n-1 при n ≥ 2. Выше показано, что для N 1 и N 2 сигнал на выходе интегратора 6 равен соответственно

заметим, что U₂ U_2;1. Далее покажем, что если при поступлении N-1 импульса на первый вход стробоскопического преобразователя 7 сигнал на выходе интегратора 6 равен

, то при поступлении N-го импульса на первый вход стробоскопического преобразователя 7 сигнал на выходе интегратора 6 будет равен

. При подаче на первый и второй входы блока 1 отклонения сигналов соответственно U₁ и

в момент поступления импульса номер N-1 на первый вход стробоскопического преобразователя 7, то согласно (4), на выходе стробоскопического преобразователя 7 в течение времени Т будет удерживаться сигнал

При наличии на выходе интегратора 6 сигнала

и при подаче на вход в течение времени Т сигнала

то сигнал на выходе изменится на величину

и станет равным

, что и требовалось доказать. Для N ≥ 6 при

сигнал на выходе интегратора 6 отличается от U₁ не более чем на 0,01% поэтому после поступления шестого импульса на первый вход стробоскопического преобразователя 7 сигнал на выходе интегратора 6 практически не меняется и остается практически равным U₁, причем вольтметр 5 будет индицировать напряжение U₁. При использовании прототипа нелинейность передаточной характеристики блока 1 отклонения непосредственно отражается на погрешности измерений.Improving the accuracy of measurements by the claimed device is also due to a decrease in the influence of non-linearity of the transfer characteristic of the deviation unit 1 on the measurement error, which is explained as follows. Due to the nonlinearity of the transfer characteristic of the deviation unit 1, the signal U ₃ at its output, instead of expression (1), will be determined by the formula
U ₃ k [1 W (U ₁ ; U ₂ )] (U ₁ U ₂ (4)
where U ₁ and U _{2 the} values of the signals, respectively, at the first and second inputs of the unit 1 deviations; W (U ₁ ; U ₂ ) the non-linearity of the transfer characteristic of the deviation unit 1 when signals U ₁ and U _{2 are} applied to its first and second inputs; -0.05 <W (U ₁ ; U ₂ ) <+0.05; W (U _a ; U _b ) 0; U _a and U _b signals, respectively, at the first and second inputs of the deviation unit 1 when monitoring its gain coefficient k; k gain of the deviation unit 1. When signals U ₁ and U _2, respectively, enter the first and second inputs of the deviation unit 1 at the time the first pulse arrives at the first input of the stroboscopic transducer 7, then, according to (4), a signal [1 W (U ₁ ; U ₂ )] (U ₁ U ₂ ) k. When the initial signal at the output of the integrator 6 is equal to U ₂ , and the input at the input of the integrator 6 during the time T of the signal [1 - W (U ₁ ; U ₂ )] (U ₁ U ₂ ) k the signal at its output changes from the original value U ₂ by the amount of [1 W (U ₁ ; U ₂ )] (U ₁ U ₂ ) and takes the value U ₁ - (U ₁ U ₂ ) W (U ₁ ; U ₂ ). We show by mathematical induction that when the N-th pulse arrives at the first input of the stroboscopic converter 7, the signal at the output of the integrator 6 is

means the product of the values of W (U ₁ ; U _{2; n-1} ) from n 1 to n N; for n 1 we have W (U ₁ ; U _{2; 0} ) 1; for 2 ≅ n ≅ N the value is U _{2; n-1} means the value of the signal at the output of the integrator 6 immediately after the arrival of the first input of the stroboscopic converter 7 of the pulse number n-1; W (U ₁ ; U _{2; n-1} ) the non-linearity of the transfer characteristic of the deviation unit 1 when signals U ₁ and U _{2; n-1} for n ≥ 2 are supplied to its first and second inputs, it is shown above that for N 1 and N 2 the signal at the output of the integrator 6 is respectively

note that U ₂ U _{2; 1} . Next, we show that if, when an N-1 pulse arrives at the first input of the stroboscopic converter 7, the signal at the output of the integrator 6 is

, then when the N-th pulse arrives at the first input of the stroboscopic converter 7, the signal at the output of the integrator 6 will be equal to

. When applying to the first and second inputs of unit 1, the deviations of the signals, respectively, U ₁ and

at the moment of arrival of the pulse, the number N-1 at the first input of the stroboscopic transducer 7, then according to (4), the signal at the output of the stroboscopic transducer 7 will be held for a time T

If there is a signal at the output of the integrator 6

and when applying to the input during the time T signal

then the output signal will change by

and will become equal

, as required. For N ≥ 6 for

the signal at the output of the integrator 6 differs from U _{1 by} no more than 0.01%; therefore, after the sixth pulse arrives at the first input of the stroboscopic converter 7, the signal at the output of the integrator 6 remains almost unchanged and remains almost equal to U ₁ , and the voltmeter 5 will indicate the voltage U ₁ . When using the prototype, the nonlinearity of the transfer characteristic of the deviation unit 1 directly affects the measurement error.

,
где

означает произведение значений q(kU₁ kU_2;n-1) от n 1 до n N; для n 1 имеем q(kU₁ kU_2;0) 1; для 2 ≅ n ≅ N значение U_2;n-1 означает величину сигнала на выходе интегратора 6 непосредственно после поступления на первый вход стробоскопического преобразователя 7 импульса номер n-1: q(kU₁ kU_2;n-1) погрешность преобразования стробоскопического преобразователя 7 при наличии на его втором входе сигнала, равного (kU₁ kU_2;n-1) при n ≥ 2. Выше показано, что для N=1 и N=2 сигнал на выходе интегратора 6 равен соответственно

причем U₂ U_2;1. Далее покажем, что если при поступлении N-1 импульса на первый вход стробоскопического преобразователя 7 сигнал на выходе интегратора 6 равен

, то при поступлении N-го импульса на первый вход стробоскопического преобразователя 7 сигнал на выходе интегратора 6 равен

. При подаче на первый и второй входы блока 1 отклонения сигналов соответственно U₁ и

в момент поступления импульса номер N-1 на первый вход стробоскопического преобразователя 7, то на выходе стробоскопического преобразователя 7 в течение времени Т будет удерживаться сигнал

. При исходном сигнале на выходе интегратора 6, равном

, и подаче на вход в течение времени Т сигнала

, то сигнал на выходе изменится на

и станет равным

, что и требовалось доказать. Для N ≥ 6 при

cигнал на выходе интегратора 6 отличается от U₁ не более чем на 0,01% поэтому после поступления шестого импульса на первый вход стробоскопического преобразователя 7 сигнал на выходе интегратора 6 практически не меняется и остается практически равным U₁, причем вольтметр 5 будет индицировать напряжение U₁. При использовании прототипа погрешность преобразования стробоскопического преобразователя 7 непосредственно отражается на погрешности измерений.Improving the measurement accuracy of the claimed device is also due to a decrease in the influence of the conversion error of the stroboscopic transducer 7, which is explained as follows. The signal at the output of block 1 deviation is determined by the expression (1). However, after each pulse received at the first input of the stroboscopic transducer 7, the signal U ₆ at its output will be determined by the formula
U ₆ [1 -q (U ₇ )] U ₇ (5)
where U _{7 the} signal at the second input of the stroboscopic transducer 7 upon receipt of a pulse at the first input; q (U ₇ ) the conversion error of the stroboscopic transducer 7 in the presence of a signal U ₇ at its second input; -0.05 <q (U ₇ ) <+0.05. When signals U ₁ and U _2, respectively, are supplied to the first and second inputs of the deviation unit 1 at the time the first pulse arrives at the first input of the stroboscopic transducer 7, then according to (1) and (5), a signal is generated at the output of the stroboscopic transducer 7 during time T [ 1 q (kU ₁ kU ₂ )] (U ₁ U ₂ ) k. When the signal [1 q (kU ₁ - kU ₂ )] (U ₁ U ₂ ) k (the signal at its output changes from the initial value U ₂ to the value [1 q (kU ₁ kU ₂ ) ] (U ₁ - U ₂ ) and takes the value U ₁ (U ₁ - U ₂ ) q (kU ₁ kU ₂ ). We show by mathematical induction that when the N-th pulse arrives at the first input of the stroboscopic converter 7, the signal at the output of the integrator 6 is

,
Where

means the product of the values q (kU ₁ kU _{2; n-1} ) from n 1 to n N; for n 1 we have q (kU ₁ kU _{2; 0} ) 1; for 2 ≅ n ≅ N the value is U _{2; n-1} means the value of the signal at the output of the integrator 6 immediately after the arrival at the first input of the stroboscopic converter 7 of the pulse number n-1: q (kU ₁ kU _{2; n-1} ) the conversion error of the stroboscopic converter 7 if there is a signal at its second input equal to (kU ₁ kU _{2; n-1} ) for n ≥ 2. It is shown above that for N = 1 and N = 2 the signal at the output of integrator 6 is respectively

and U ₂ U _{2; 1} . Next, we show that if, when an N-1 pulse arrives at the first input of the stroboscopic converter 7, the signal at the output of the integrator 6 is

, then when the N-th pulse arrives at the first input of the stroboscopic transducer 7, the signal at the output of the integrator 6 is

. When applying to the first and second inputs of unit 1, the deviations of the signals, respectively, U ₁ and

at the moment of receipt of the pulse number N-1 at the first input of the stroboscopic transducer 7, the signal will be held at the output of the stroboscopic transducer 7 for a time T

. When the source signal at the output of the integrator 6 is equal to

, and applying to the input during the time T signal

, then the output signal will change to

and will become equal

, as required. For N ≥ 6 for

the signal at the output of the integrator 6 differs from U _{1 by} no more than 0.01%; therefore, after the sixth pulse arrives at the first input of the stroboscopic converter 7, the signal at the output of the integrator 6 practically does not change and remains almost equal to U ₁ , and the voltmeter 5 will indicate the voltage U ₁ . When using the prototype, the conversion error of the stroboscopic transducer 7 is directly reflected in the measurement error.

 The simplification of the measurement procedure is due to the fact that when measuring the measured signal, the voltmeter 5 indicates the value of the measured signal at points whose waveform coincides with the horizontal horizontal risk 11. When using the prototype to determine the magnitude of the measured signal, it is necessary to divide the voltmeter reading by the gain of the deviation unit 1.

Claims (1)

 An oscilloscope containing a voltmeter, a deviation unit, a cathode ray tube, a scan unit, a stroboscopic converter, a delay line and a synchronization unit, the input of which is connected to the synchronization bus, and the output of the synchronization unit is connected to the inputs of the delay line and the scan unit, the first and second inputs of the stroboscopic the transducer is connected to the outputs of the delay line and the deviation unit, respectively, and the input of the deviation unit is connected to the bus of the measured signal, characterized in that, in order to improve accuracy and control During the measurement procedure, an integrator is introduced, the input of which is connected to the output of the stroboscopic converter, the integrator output is connected to the input of the voltmeter and the second input of the deviation unit, the outputs of the scan unit and the deviation unit connected to the first and second inputs of the cathode ray tube, respectively.

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