SU1117536A1 - Cathode-ray oscillograph - Google Patents

Abstract

ELECTRON-BEAM OSCILLOGRAPH containing the input signal block, the first input of which is connected to the bus of the signal under study, the second input - with the calibrator output of amplitude and duration, and the output with the input of the second delay line and input of the measuring unit of the duration of the signal under investigation, whose output is connected to the input of the control, the first output connected to the input of the display unit of the scan time, a pre-amplifier whose output is connected to the input of the first delay line and the input of the synchronization unit, output ohm connected to the input of the sawtooth generator, the output of which is connected to the input of the horizontal deflection amplifier, the output connected to horizontally deflecting plates of the cathode ray tube, the vertical deflection of which plate is connected to the output of the vertical deflection amplifier, input connected to the output of the first delay line, To electrically controlled delay lines of a stretching channel and K blocks for stretching a channel, with the output of the first electrically controlled line delay of the stretching channel is connected. through the first block of matching the stretching channel and a series of electrically controlled delay lines and stretching channel matching blocks with the input of a K-th electrically controlled delay channel of the stretching channel, the output of which is connected to the input K th block. matching the stretching channel, characterized in that, in order to provide a wide range of durations of repeating the quad and non-repeating pulse signals and automatically setting their time scale, it is equipped with first and second channel switching blocks, With electrically controlled compression channel delay lines, To matching blocks t of the compression channel, 2K blocks of keys, the inputs of which are connected to the 2K outputs of the control unit, and the output to the control inputs of electrically controlled delay lines of the extension channels and compression, the first output of the first channel switching unit is connected to the input of the first electrically controlled delay channel of the expansion channel, the first input - with the output of the second delay line, the second output - with the input of the first electrically controlled delay line of the compression channel, and the second input - with w- the output of the control unit and the second input of the second switching unit, the first input of which is connected to the output of the K-th expansion channel matching unit, the third input - with the output of the K-th compression channel matching unit, and the output - to the preamplifier input, and the output the first electrically controlled compression channel delay line is connected via the first compression channel matching unit and a series of electrically controlled delay lines and compression channel matching units connected in pairs to the input Kth electric pack

Description

equal to the delay line of the compression channel, the output of which is connected to the input

K th compression channel matching block.

The invention relates to electrical measuring equipment and can be used in devices for observing and studying shulsen signals.

A known electron-beam oscilloscope containing a trigger pulse shaper, an output connected to the first input of the time selector and the first input of the sweep generator, the first output of which is connected to the input of the horizontal deflection amplifier, the second output - to the first inputs of the increase and decrease scan duration and the second input a time selector whose input is connected to the input of a pulse counter, the first output of which is connected to the second input of the sweep shortening unit, and Torah output - to a second input of increasing duration razverki, and outputs blocks to reduce and increase the duration time ertki scaler connected to inputs of the control unit scan duration, outputs connected to inputs of the block and digital readout via the relay with the control inputs of the timebase tlK

The disadvantages of this device are narrow bandwidth, low sensitivity, inability to automate the measurement process in the case of non-repeated signal testing, and the difficulty of connecting devices for digital processing of broadband signals due to the automation of setting only the horizontal scale of the image on the screen and not the duration of the signal itself.

The closest to the invention in its technical nature is an electron-beam oscilloscope containing a block of input signals, the first input of which is connected to the bus of the signal under study, the second input with the calibrator output of amplitude and duration, and the output with the input of the second delay line and the input of the measuring unit the signal under study, the output of which is connected to the input of the control unit, a preamplifier, the output of which is connected to the input of the first delay line and the input of the synchronization unit

output connected to the input of the sawtooth generator, the output of which is connected to the input of the horizontal deflection amplifier, the output connected to the horizontal deflection plates of the electron-tube, the vertical deflection plates of which are connected to the output of the vertical deflection amplifier JO, the input connected to the output of the first delay line, To electrically controlled delay lines and a stretching channel and K blocks matching the stretching channel, moreover

the output of the first electrically controlled line The expansion channel of the expansion channel is connected via the first block of the extension channel and a series of electrically controlled delay lines connected in series and

stretch channel matching units with an input of a Kth electrically controlled delay line of a stretching channel, the output of which is connected to the input of the Kth stretch channel matching unit, an output connected to the preamplifier input, and the third output of the control unit is connected to the control input block of input signals, the second output - with

the input of the sawtooth generator, the first output - with the input of the indication unit of the sweep duration, and the additional outputs with the inputs of the control voltage blocks, the outputs of which are connected to the control inputs of the electrically controlled delay lines, and the input of the first electrically controlled delay line is connected through the second delay line with the output of the block of input signals C21.

A disadvantage of the known device is that it does not provide a wide range of durations of repetitive and non-repeating studied pulse signals and the automatic setting of their time scale.

The purpose of the invention is to provide a wide range of durations of repetitive and non-repetitive pulse signals and automatic setting of their time scale.

This goal is achieved by the fact that the electron beam oscilloscope, co.

A second input signal block, the first input of which is connected to the signal bus, a second input with an amplitude and duration calibrator input, and an output to the second delay line input and input of the measuring signal duration unit, the output of which is connected to the control unit input, the first output with the input of the indication unit of the sweep duration, the preamplifier whose output is connected to the input of the first delay line and the synchronization input, the output connected to the generator input voltage is connected to the input of a horizontal deflection amplifier by an output connected to a horizontally deflecting plate of a cathode-ray tube, whose vertical deflection plates are connected to the output of a vertical deflection amplifier, to an input connected to the output of a first delay line, to electrically controlled delay lines of the extension channel and K units for matching a stretching channel, the output of the first electrically controlled delay line of the stretching channel being connected through the first fused to match the stretching channel and a series of electrically controlled delay lines in pairs and the stretching channel matching blocks with the input of the Kth electrically controlled delay channel of the stretching channel, the output of which is connected to the input of the K-th stretching channel matching unit, provided with first and second channel switching units, to electrically controlled compression channel delay lines, to compression channel matching units, 2K key blocks whose inputs are connected to 2K outputs of the control unit, and - with control inputs of electrically controlled delay lines of extension and compression channels, the first output of the first channel switching unit is connected to the input of the first electrically controlled delay channel of the extension channel, the first input - with the output of the second, delay line, second output - with the input of the first electrically controlled delay line of the compression channel, and the second input - with the second output of the control unit and the second input of the second channel switching unit, the first input of which is connected to the output of the K-th channel matching unit the third input is with the output of the K-th compression matching unit, and the output with the input of the preamplifier; the output of the first electrically controlled line will delay the compression channel through the first compression matching unit and electrically connected in pairs controllable delay lines and blocks of matching the compression channel with the input of the Kth electrically controlled delay line of the compression channel, the output of which is connected to the input of the K-th compression channel matching unit. The drawing shows a block diagram of the device. The device consists of a block of 1 input signals, a calibrator 2 amplitudes and durations, a second delay line 3, a first block of 4 channel switches, 2K electrically controlled delay lines 5 of the signal expansion and compression channel, 2K signal matching and compression channel 6 blocks , block 7 measuring the duration of the signal under study, 2K blocks 8 keys of the channels of stretching and compressing the signal, block 9 controls, preamplifier 10, block 11 synchronization, generator 12 sawtooth voltage, amplifier 13 horizontal from loneni, cathode ray tube (CRT) 14, a vertical deflection amplifier 15, a first delay line 16, the display unit 17 scan duration and the second switching unit 18 channels. The first input of block 1 of input signals is connected to the bus of the signal under study, the second input is connected to the output of the calibrator 2 amplitudes and durations, and the output is connected to the input of the second delay line 3 and the input of block 7 to measure the duration of the signal under investigation, the first output connected to the input of the block 17 display the duration of the sweep. The output of the preamplifier 10 is connected to the input of the first delay line 16 and the input of the synchronization unit 11, the output connected to the input of the sawtooth generator 12, the output of which is connected to the input of the horizontal deflection amplifier 13, the output connected to horizontal CRT plates 14 that are vertically diverging the plates of which are connected to the output of the vertical deflection amplifier 15, the input connected to the output of the first delay line 16. The output of the first electrically controlled delay line 5 of the expansion channel is connected through the first block 6 of matching the stretch channel and a series of pairwise connected electrically controlled delay lines 5 and blocks 6 of matching the stretch channel with the input of the Kth electrically controlled delay channel 5 extension, the output of which is connected to the input of the K-th block 6 matching the expansion channel. A 2K block of 8 keys was connected to the 2K outputs of control unit 9, and the outputs were connected to control inputs of electrically controlled delay and compression channel 5 delay lines, the first output of the first channel switching unit 4 connected to the input of the first electrically controlled line 5 the delay channel is stretched., the first input is with the output of the second delay line 3, the second output is with the input of the first electrically controlled compression channel delay line 5, and the second input is with the second output of the control unit 9 and the second input of the second switch 18 No channels, the first input of which is connected to the output of the K-th block 6 for matching the expansion channel, the third input - with the output of the K-th block 6 for matching the compression channel, and the output - to the input of the preliminary amplifier 10, and the output of the first electrically controlled li 5 delays of the compression channel are connected via the first block b of matching the compression channel channel and a series of electrically controlled delayed lines 5 in pairs and blocks of matching the channel. Compression with the output of the K-th electrically controlled delay channel 5 of the compression channel output to The terminal is connected to the input of the K-th block 6 for matching the compression channel. The device operates as follows. The signal under study, through the input signal unit 1, is fed to the input of the second delay line 3 and spreads at its final speed. At the same time, the signal under study enters the duration measurement unit 7, which generates a signal containing information about the duration of the signal under study. When the output signal of the duration measurement unit 7 arrives at the control unit 9, the latter generates control pulses supplied to the first 4 and second 18 channel switching units. In the case when the shortest signal of the duration range is examined, the signal under study passes through the first channel switching unit 4 to signal extension channel, i.e. to the input of the first controlled line 5 of the delay of the signal stretching channel. At the moment when the entire signal under investigation is within the first controllable delay line 5, the control unit 9 sends a control pulse to the input of the first key block 8, which decreases the propagation speed of the test signal in, a line (a jump-like change in the reactivity of the delay line) . The spasmodic decrease in the rate of propagation of a signal in a delay line causes, as it leaves the delay line, a change in the temporal position of the instantaneous values, i.e. time-domain transformation of the studied signal is carried out. If the delay of the instantaneous values is carried out according to the law t-tg + oLb, where tg is the initial delay, v-coefficient, -L is the time distance from the beginning of the signal, then the time scale is linearly transformed (linearly expanded) of the signal under study without distorting it Forg-m. The specified delay law of instantaneous values of the signal is ensured if the jump-like change of the pair-delay line takes place at the moment when the whole signal under investigation is in line. As a result, the first controlled delay line 5 enters the time delay through the first matching unit 6. signal with a narrower spectrum. In the second and subsequent control delay lines 5, similar time scale transformation processes occur. In this case, the control inputs are supplied to the inputs of the corresponding key blocks 8 from the outputs of the control block 9. From the delay lines 5, HMGTb should have a delay time exceeding the delay time of the previous line by cj, times (q, is the transformation ratio of the time scale of the previous line). Thus, the output of the Kth controlled delay line 5 is an extended signal through the matching unit b and the second channel switching unit 18 to the input of the preamplifier 1p. Its duration corresponds to a certain normalized duration, and the narrowed spectrum when passing through the preamplifier 10 is not distorted. The transformed signal amplified in the preamplifier 10 through the first delay line 16 and the vertical deflection amplifier 15 is supplied to the vertical deflection plates of the CRT 14. Simultaneously, the signal through the synchronization unit 11 starts the sawtooth voltage generator 12, linearly varying in voltage, amplified in the amplifier 13 horizontal deviation, is fed to the horizontal deflecting plates of the CRT 14, and the waveform of the test signal is reproduced on the screen of the CRT 14. The display of block 1 of the sweep duration indication shows the sweep duration taking into account the amount of stretch of the signal under investigation, Tc, e „taking into account the number of blocks of 8 keys involved and the amount of stretch of the signal (time scale transformation ratio) in a separate line. If, for example, in the signal expansion channel, five controllers are connected in series

lines of delay, then with a double stretch of the signal in each line, a stretch of the signal in the channel can be achieved 2 times.

In the case when the signal with the longest admissible duration is investigated under the action of the control voltage coming from the control unit E, the first channel switching unit 4 passes the test signal to the input of the first controlled delay line 5 of the compression channel of the signal under study. Under the action of the control voltage of the control unit 9 supplied to the input of the first key block 8 at the moment when the entire signal is in the first controlled delay line 5, its delay decreases in a jump-like manner and, as the instantaneous values of the signal come out of the line, they are compressed in time i.e. a time scale transform occurs, and the signal spectrum is expanded.

The signal then passes through the first matching bit block 6 and the subsequent sequentially connected controlled delay lines 5 and the matching block 6, undergoing similar transformations. The delay time of each line must be less than the delay time of the previous line. Through the second channel switching unit 18, the signal of the normalized duration (of the same magnitude as the output of the stretching channel) is fed to the input of the preamplifier 10, which does not require a change in the sweep duration on the screen of the CRT 14 to be reproduced on the display of the transformed signal. 17 display the duration of the sweep.

In the case of examining signals of any duration (within the dynamic range of permissible durations), control unit 9 generates control pulses for corresponding blocks of 8 keys that change the electrical length of a certain number of delay lines, and if the duration of the signal under investigation is less than the specified normalized duration, the signal enters the extension channel, if the duration of the signal under study is longer than the normalized duration, it enters the compression channel. Electrically controlled delay lines 5, for which no control pulses are applied, play the role of ordinary delay lines.

If the expansion channel allows the signal to be expanded K times, and the compression channel shrinks the signal by K times, then the signal duration at the preamplifier input will be normalized by changing the input signal duration by K times.

The normalization of the signal duration at the input of the amplification path, at which the spectral width of the signal under investigation is matched with the passband of the amplified path, provides an extension of the range of repetitions and durations. nonrecurring pulse signals under investigation and automatic scale setting of the signals under study. Normalizing the signal duration at the input of the amplification path significantly simplifies the sawtooth generator, ensures high linearity of the sweep voltage (time scale uniformity), improves the measurement accuracy of the parameters of the signals under study, simplifies their digital processing and reduces the device drift.

Claims (1)

ELECTRON BEAM Oscilloscope containing a block of input signals, the first input of which is connected to the bus of the signal under study, the second input is the output of the amplitude and duration calibrator, and the output is with the input of the second delay line and the input of the unit for measuring the duration of the studied signal, the output of which is connected to the input of the block control, the first output connected to the input of the scan duration indication unit, a preliminary amplifier, the output of which is connected to the input of the first delay line and the input of the synchronization unit, the output is connected connected to the input of the sawtooth voltage generator, the output of which is connected to the input of the horizontal deflection amplifier, the output connected to the horizontally deflecting plates of the cathode ray tube, the vertically deflecting plates of which are connected to the output of the vertical deflection amplifier, the input connected to the output of the first delay line, K electrically controlled lines stretch channel delay and K stretch channel matching blocks, the output of the first electrically controlled channel delay line the stretching channel is connected. through the first block matching the stretching channel and a series of electrically controlled delay lines and the matching blocks of the stretching channel pairwise connected to the input of the Kth electrically controlled delay line of the stretching channel, the output of which is connected to the input of the Kth block. coordination of the extension channel, characterized in that, in order to ensure a wide range of durations of repeating and non-repeating pulse signals and automatically setting their time scale, it is equipped with first and second channel switching units, K electrically controlled compression channel delay lines, K compression channel matching units , 2K key blocks, the inputs of which are connected to 2K outputs of the control unit, and the output to the control inputs of the electrically controlled delay lines of the channels of channels _ extension and compression the first output of the first channel switching unit is connected to the input of the first electrically controlled delay line of the extension channel, the first input is the output of the second delay line, the second output is the input of the first electrically controlled delay line of the compression channel, and the second input is connected to the second. by the direct output of the control unit and the second input of the second channel switching unit, the first input of which is connected to the output of the Kth block according to W of the expansion channel, the third input is with the output of the Kth compression channel matching block, and the output is with the preliminary input an amplifier, and the output of the first electrically controlled delay line of the compression channel is connected through the first block matching the compression channel and a number of pairwise sequentially connected electrically controlled delay lines and blocks matching the compression channel with the input of the Kth e electrically up1117536 equal delay line of the compression channel, the output of which is connected to the input K-th block matching channel compression,