SU1022067A1 - Device for recording and analyzing electric signals - Google Patents

Abstract

A DEVICE FOR RECORDING AND ANALYSIS OF ELECTRIC SIGNALS containing a serially connected signal source, a recording unit and a playback unit, one of the outputs of which is connected to a discriminator, as well as a clock signal sensor connected via an adder to the second input of the recording unit, and an analyzer whose output is connected to A recorder, characterized in that, in order to improve the measurement accuracy, an analog-to-digital converter, a time code sensor, have been entered into it. a time code block, a code converter, a frequency multiplier, a key, a comparison block, a sampling area generator, a block order, the analog-to-digital converter input connected to the second output of the playback unit, and the output through the key to the analyzer input, the first discriminator output through The frequency multiplier is connected to the control input of the analog-to-digital converter, the second output is connected to the first input of the time code allocation unit, the second input of which is connected to the second input of the playback unit, and its output - with the input of the converter code which outputs through the block comparison u. The transmitter is connected to the sampling zone driver, the output of which is connected to the control key input, the output of the master unit Zle is connected to C: I by the second inputs of the comparator unit, and the time code sensor connected to the second output of the sync signal is connected to the second input of the adder. ABOUT

Description

The invention relates to an analysis technique and an accurate magnetic recording; it can be used in a re-recording and analysis apparatus: electrical signals. A harmonic analyzer is known that contains a signal source, a memory unit, a time scale converter, and the memory block is connected to the first input of a time scale converter, the second input of which is connected to the source signal. The time scale converter output / is connected to the second input of the Sz- H. The disadvantage of this device is the low accuracy of the analysis of non-periodic electrical signals. . . . The closest in technical essence and the achieved effect to the invention is a device, which contains a signal source, a recording unit, a playback unit, a tape mechanism, an adder, a meter, and a time correction correction signal. a scale sensor, an intermediate frequency filter, a discriminator, a mixer, a local oscillator, and a frequency spectrum analyzer consisting of a mixer, a local oscillator, and a narrowband filter tuned to one of the combination frequencies of the C 2 mixer. The drawbacks of the device are the presence of significant errors in spectral analysis when measuring the frequency spectra in real time. This is due to the use of an intermediate frequency, which is a combination of the frequencies of the local oscillator signals and the analyzed signals and the absence of an exact time reference of the analyzed electrical signal segments. The purpose of the invention is to improve the measurement accuracy. The goal is achieved in that a device for recording and analyzing electrical signals, containing a signal source connected in series, a recording unit and a playback unit, one of whose outputs is connected to a discriminator, as well as a sync signal sensor connected via an adder to the second input of the recording unit, and analyzer, the output of which is connected to the recorder, is introduced an analog-to-digital converter, a time code sensor, a time code allocation unit, a code converter, a frequency multiplier, a key, a comparison unit, and the sampling zone finder, the master unit, while the analog-to-digital converter input is connected to the second output of the playback unit, and the output is via the key to the analyzer input, the first output of the discriminator is connected to the control input of the analog-digital converter through the second input to the first the input of the time code allocation unit, the second input of which is connected to the second input of the playback unit, and its output to the input of the code converter, the outputs of which through the comparison unit are connected to the area support you orc, whose output is connected to a control input of a key, and outputs the driver unit are connected to second inputs of the comparing unit and to the second sensor output clock time code sensor is connected, the output of which is connected to the second input of the adder. The drawing shows a block diagram of the device. The device contains a source of 1 signal, a recording unit 2, a playback unit 3, an analog-to-digital converter (ADC) 4, a time code sensor 5; time code allocation unit 6, discriminator 7, adder 8, code converter 9, frequency multiplier 10, key 11, clock signal sensor 12, comparison unit 13, sampling area generator 14, analyzer 15, driver unit 16, recorder 17. The device works as follows . From the output of source 1 of the signal, the electrical signal in analog form is fed to the first input of the node recording unit 2 from the multi-track magnetic recording, where information is recorded on one of the magnetic carrier tracks, on the other track of which the service information is recorded in parallel, which is fed to the second input of the recording unit 2 from the output of the adder 8. The service information is an additive mixture of clock signals and time code pulses, which is received in adder 8, summing the clock signals from the -12 sync sensor signals and time code pulses, kotoryevyrabatyvayuts sensor 5 timecode. When playing back the recorded on a magnetic media from the first output of the playback unit 3 to the first input of the A / D converter 4, electrical signals are transmitted in analog form for conversion to binary code. In parallel with the second output of the 3-reproducing unit, an additive mixture of clock signals and pulses of the time code is applied simultaneously to the first input of the block b for allocating the time code and the input of the discriminator 7. In the discriminator 7 is the selection of the sync signals by amplitude selection. The delayed and extended sync signals ic of the discriminator 7 are fed to the second input of the time code allocation block b, where they are used to extract the time code from the service signal. From the output of block 6, the allocation of the time code, the code corresponding to the current time, is supplied. To the input of the code converter 9, which is a serial code converter, into a parallel one. Signature unit 16 is a register whose outputs are outputs of a unit. The input of the specified register is connected to the typesetters. With the help of typesetting devices, it is possible to type a definite. Thus, the parallel code that determines the current experiment time is transmitted to the outputs of the master unit 16i. Accordingly, the second inputs of the comparator unit 13 are connected to the outputs of the master unit 16. Its first inputs are connected to the outputs. Converter 9, to which the parallel code is output, corresponds to the current experiment time. The impulse from the output of the comparator block 13 is fed to the input of a formarr. 14 sampling zones, which the fort has resolving potential. The beginning of the resolving potential is determined by the pulse from the output of the comparison unit 13, and the duration is determined by the observation interval necessary to obtain a consistent assessment of the frequency (Full spectrum. The potential is supplied to the control input of the key 11. MCh 4 is a hard-synchronized analog - a digital converter, to the output of which, through the key 11, is connected an analyzer 15, which is a set of digital filters with integrators.

total analysis. A recorder 17 is connected to the output of the analyzer 15, where the result is recorded. Comm Frequency Analysis. To the first output of the discriminator 7 is connected to the input of the frequency multiplier 10. To the output of the frequency multiplier 10 is connected up. equal (th ing input ADC 4.

 This control structure of the A / D converter 4 allows the frequency analysis to be carried out at an in-speed reproduction rate. magnetic media formations arbitrarily different from the recording speed. If the playback speed changes in relation to the recording speed N times, then the period of the reproduced sync signals is changed by I times. The synchronization frequency is proportional to

APS 4, which is set by the clock pulses, coming from the output of frequency multiplier 10. At the same time, the sampling period of the original signal remains. is constant. Increasing the playback speed with respect to the recording speed allows reducing the time of frequency analysis in proportion to this increase in speed, as well as finding the most optimal frequency range Q of the analysis zones, since the band edge frequencies are transported in proportion to the speed change.

Thus, the device eliminates the effect on the measurement results of the stability of the speed of the tape-carrying mechanisms of the recording and reproducing units of magnetic recording apparatus. This is done by tracking the synchronization frequency and, accordingly, by electronic correction of this frequency during analog. digital conversion, and not the regulation of such an inertial link of the tract, as a tape drive mechanism. 5 This improves the accuracy of hardware analysis by 20%.

Claims (1)

(57) A DEVICE FOR RECORDING AND ANALYSIS OF ELECTRICAL SIGNALS, containing a signal source in series, a recording unit and a playback unit, to one of the outputs of which a discriminator is connected, as well as a clock sensor connected through the adder to the second input of the recording unit, and an analyzer, output which is connected to the recorder, characterized in that, in order to increase the accuracy of measurements, an analog-to-digital converter, a time code sensor, a time code allocation unit, a code converter are introduced into it intelligently a frequency amplifier, a key, a comparison unit, a sample zone former, a master unit, while the input of the analog-to-digital converter is connected to the second output of the playback unit, and the output through the key to the input of the analyzer, the first output of the discriminator is connected to the control input of the analog-digital through a frequency multiplier converter, the second output is with the first input of the time code allocation block, the second input of which is connected to the second input of the playback block, and its output is with the input of the code converter, the outputs of which are via the The connections are connected to the sample zone former, the output of which is connected to the control input of the key, and the output of the driver unit is connected to the second inputs of the comparison unit, and a time code sensor is connected to the second output of the clock sensor, the output of which is connected to the second input of the adder.