SU1117689A2 - Device for recording and reproducing binary information on magnetic tape - Google Patents

Abstract

DEVICE FOR RECORDING AND REPRODUCTION OF BINARY INFORMATION ON A MAGNETIC TAPE on auth.St. No. 720491, characterized in that, in order to provide current control during information reproduction, a test sequence shaper, an information and test sequence shaper, an adder, a dividing interval shaper, a reproduction signal separator, a shaper of the playback signal reproduction, input the start-up bus and the control and indication unit, whose inputs are connected respectively to the direct output of the separation gate generator in playback and first. the output of the playback signal separation unit, the two outputs of the playback device are connected respectively to the inputs of the separation unit of the playback signals and the generator of the playback signal gates, the second output of which is connected to the second input of the playback signal separation unit, the second output of which is the output of the device - the world of clock pulses is connected to the first inputs of the test sequence driver, the separation interval interval generator Into the gate generator of the information § and test sequence, the second input is co-connected with the input (L start bus, direct output - with the second input of the divider intervals and the first adder input, and the inverse output with the second input of the test sequence generator, output the latter is connected to the second input of the adder, the third input of which is connected to the world of information impulses, and the output to the first input of the recording device 00 connected to the output of the distributor by the second input numerator with GOVERNMENTAL intervals. .

Description

 The invention relates to boring, in particular, to recording and reproducing binary information on a tape recorder of a narrow-band tape recorder. According to the main auth. No. 720491 known recording device and. playback of binary information on a magnetic tape, containing a recording unit connected by an output to a tape recorder, whose output is connected to a playback unit, while the recording unit contains an amplitude modulator and a modulating device connected by outputs to a matching device, and the playback unit contains a matching an input device connected respectively via a clock generator and an amplitude selector to a coincidence device and a delay device connected to a pulse generator information. In the device for increasing the quality of recording and reproducing, eliminating the effect of magnetic tape deformation, digital binary information modulates the amplitude of the pulses so much, and the resulting signal is recorded on one track of the magnetic tape, which during playback eliminates the influence of deformation and detonation of the magnetic tape on its the length and cross section of 1 J. However, the known device does not allow monitoring the reproduction of information without distorting the basic information, since it does not contain elements Recording signals containing interleaved pieces of information and a test code sequence ./ The aim of the invention is to provide current control during the generation of information. The goal is achieved by introducing a test sequence shaper, an information and test sequence shaper, an adder, a dividing interval shaper, a playback signal dividing unit, a playback dividing gates shaper, an input trigger bus, and a tape recorder and playback device for binary information on a magnetic tape. the control and display unit, the inputs of which are connected respectively, with the direct output of the splitter driver the playback signals and the first output of the playback signal separation unit, while the two outputs of the playback device are connected respectively to the inputs of the playback signal separation unit and the playback gate generator of the playback signals, the second output of which is connected to the second input of the playback signal separation unit, the second output of which is the device output , moreover, the driver of the clock pulses is connected to the first inputs of the driver of the Test Sequence, separator spacing bodies and the gate generator of the information and test sequences, the second input of which is connected to the trigger input bus, direct output to the second input of the splitter interval generator and the first adder input, and the inverse output with the second input of the test sequence generator, the output of the latter is connected to the second the adder input, the third input of which is connected to the information pulse shaper, and the output - to the first input of the recording device connected by the second input to the output oduer dividing intervals. On Fig.1 presents a diagram of the proposed device; in fig. 2 and 3 are time diagrams for recording and playback, respectively. The device contains a recording device 1, a tape recorder 2, a playback device 3, a test sequence driver 4, an information and test sequence gate generator 5, separation intervals driver 6, an adder 7, a playback signal separation unit 8, a playback signal separation gate generator 9 and indications, start input bus 11, input clock 12 clock pulses from the clock pulse generator (not shown) and input bus 13 pulse information mation coming from the pulse shaper information. The tape recorder 2 is connected to the output of the recording device 1 and the input of the playback device 3. The inputs of the block 10 are connected respectively to the direct output of the playback separator 9 of the separation signal gates and the nepBbW output of the playback signal separation unit 8, the two outputs of the playback device 3 are connected respectively to the inputs of the playback signal separation unit 8 and the generator of the playback signal generator 9, the second output of which connected to the second input of the playback signal separation unit 8, the second output of which is the output of the device. Moreover, the clock pulse shaper is connected to the first inputs of the shaper 4 of the test sequence, shaper 6 of the spacing intervals, and the shaper of 5 gates of the information and test sequence through the input bus 12 clock pulses. The second input of the imaging unit 5 gates of the information and test sequences is connected to the input bus 11, the direct output connects to the second input of the imaging unit 6 separation intervals and the first input of the accumulator 7, and the inverse output connects to the second input of the imaging unit 4 of the test sequence, the output of the latter is connected to the second the input of the adder 7, the third input of which is connected to the information pulse shaper via the input bus .13 pulses of information, and the output from the first input of the recorder 1 connected by the second input to The shaper output 6 separation intervals. The device works as follows. The triggering pulse of the beginning of the digital binary information and the tact pulses are fed to the inputs of the shaper 5 of the information and test sequence (Fig. 1). The shaper 5 gates information and test sequence contains, for example, the number of 96 clock cycles, a static trigger and an inverter (NOT) (not shown). The triggering pulse (Fig. 25) translates the static trigger into a single state and simultaneously zeroes the counter of the number 96. After 96 counts are counted, the counter enters a pulse (Fig. 2c), which translates the static trigger into the initial (zero) state. Thus, a resolution strobe with a duration of 96 clocks (Fig. 2a) is selected, which is fed directly to the adder 7 and to the shaper 6 of the dividing intervals, and in the inverse to the shaper 4 of the test sequence (Fig. 2E). The test sequence driver 4, for example, contains a pattern, matches AND, to which the inverted strobe is enabled, clock pulses, a binary code counter (for example, 1333 YIE2) and a selector multiplexer (not shown). The tact pulses that have passed through the circuit And during the time of the inversion of the resolution gate (Fig. 2e) are applied to a counter, which gives the result of counting in a parallel binary code. The outputs of the parallel binary code are provided to the control selector-multiplexer inputs. The information inputs of the selector-multiplexer are stitched constantly in the desired test control code, or this code is dialed using toggle switches to connect them either to the logical O or to the logical-f; 1. Under the effect of clocking with a parallel binary code, the flashed control test code arrives at the output of the selector-multiplexer in a serial form with a clock pulse frequency (Fig. 2;) and is fed to the input of the adder 7. The adder 7 contains, for example, two circuits 2I — NO , the inverter is NOT and the scheme 2Ш1И-НЁ (not shown). One input of the first circuit And is supplied with digital binary information (Fig. 2h), and to the other input - a gate resolution (Fig. 2d). At one input of the second circuit AND, the test control code (Fig.) Is fed, and at the other input, the NOT is already inverted by the NOT-strobe-resolution (Fig. 2e) circuit. Both schemes and schemes filed in two. the input of the OR circuit, where these signals are combined, and then fed to the information input of the recording device 1 (Fig. 2i). The synchronization clock pulses are fed to the other input of the recorder 1. Clock synchronization pulses are generated in the shaper of 6 dividing intervals from the pulse clock (Fig. 2c) and the resolution gate and must be an interruption of a simple clock pulse sequence with a gap of 2-3 clock pulses between the digital binary information and the test code of the controller (Fig . 2;, h). For this, the shaper of 6 split intervals contains, for example, a resolution strobe inverter, a discriminator for duration, shortening the duration of the inversion of the resolution strobe from the beginning and the end for a time of 2-3 clocks each (Fig. 2n), two circuits 2I-NOT for receiving pulses only within the resolution strobe (Fig. 2k) and the shortened resolution strobe invasion (Fig. 2m) and the OR scheme (not shown) to combine them and feed them to the clock input of the recording device t (Fig. 2n). In the recording device 1, the synchronization clock pulses are modulated in amplitude according to the law of the combined signal, and the received signal is fed through the matching device to the recording head of the tape recorder 2 (Fig. 2o, p). . In the playback device 3, connected to the tape recorder head 2, to receive the beat pulses (Fig. 3), the signal passes the two-way limit — inversion and delay. At the same time, the signal arrives at the amplitude limiter, and then at the coincidence device, where the recorded information is selected by the action of the tact pulses (Fig. 2i). , "- Tact pulses generated in the playback device 3, are fed to the input of the imaging unit 9 of the playback signal separation gates, which contains, for example, a combiner, a count of 96 ticks, a static trigger, an AND circuit and a count of 16 ticks. The signals of the direct inverted type of clock pulses and delayed clock pulses are summed by the duration according to the ZIS-HE scheme (not shown). At the output, pulses of the duration of all digital binary information and the duration of the test control code (Fig. 35) are obtained with a gap between them of 2-3 clocks. Inversions of such a signal are short pulses used to zero the counters of numbers 96 and 16 (ig. 3). The tact pulses of the direct form (Fig. Sc |) are fed to the counting input of the count 96, which, after the end of the count, gives out a pulse (Fig. 29). This pulse is applied to one input of a static trigger and sets it to one state (Fig. 2d). The output of the static trigger is connected to one input of the circuit, the second input of which is also fed to the clock of the direct form (Fig. For). Under the action of a single state of a static trigger, clock pulses pass to the output of the AND circuit and are fed to the counter for the number 16 (Fig. 3d). The count pulse of the number 16 is applied to the second input of the static trigger and translates it into the initial zero state. At the output of a static trigger, a signal appears in the form of a pulse in the intervals between digital binary information and a duration equal to the duration of the test control code (Fig. 3). This pulse from the output of the shaper of the separation of playback signals 9 is fed to one input of the playback signal separation unit 8, which contains, for example, two AND schemes and one NOT inverter. Information from the output of the playback device 3 (Fig. 3) (not shown) is fed to one input of the one and the other circuits AND. To the second input of the first circuit AND and to the input of the inverter, the output of which is connected to another input of the second circuit AND, a pulse is output from the output of the imaging unit 9 of the playback signal separation gates. Therefore, at the output of the first circuit AND there is only information of the test control code (Fig. 3), which is fed to the input of the control and display unit 10, and at the output of the second circuit AND there is only digital binary information that is fed to the output of the device (fig.). The control and display unit 10, for example, contains a binary pulse counter of the test control code, a decoder, an EXEC scheme (not shown), some information inputs of which are flashed continuously or using toggle switches in the desired test control code, and parallel for comparison to other inputs. the binary code of the test control from the decoder, a clocked. counter of the number of pulses for compliance of the reproduced code of the test control with the installed one, the memory register of the number of counted pulses and indicators of failure (or inconsistencies) of the test control code, which may be light, sound, or seven-segment boards (type 1 9 evil 3211) reflecting the number of mismatches along the entire length of the tape or its part. The invention permits recording-reproduction control without distortion by overlaying the information and test signals. JlShlsh lnpshshllllJlsh 5 cl shlshshnn

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Claims (1)

DEVICE FOR RECORDING AND PLAYING BINARY INFORMATION ON MAGNETIC TAPE by ed. No. 720491, characterized in that, in order to ensure current control during the reproduction of information, a test sequence generator, information and test sequence generator, adder, separation interval generator, playback signal separation unit, and playback signal separation shaper are introduced into it. the input trigger bus and the control and indication unit, the inputs of which are connected respectively to the direct output of the reproducing signal separation signal strobe generator and the first output of the playback signal separation signal unit, while two outputs of the reproducing device are connected 'respectively to the inputs of the playback signal separation unit and the reproduction signal strobe generator the second output of which is connected to the second input of the separation unit of the playback signals, the second output of which is the device’s output, and the clock driver is connected to the first inputs of the test sequence generator, the separator of the intervals and the gate generator of the information and test sequences, the second input of which is connected to the input trigger bus, the direct output to the second input of the separator interval driver and the first the adder input, and the inverse output with the second input of the shaper of the test sequence, the output of the latter is connected to the second input of the adder, the third the course of which is connected with the information pulse shaper, and the output with the first input of the recording device connected by the second input to the output of the separator intervals shaper. ι SU,.,. 1117689> 1 1117689