SU1129728A1 - Device for checking groups of information pulses - Google Patents

Abstract

A DEVICE FOR THE CONTROL OF INFORMATION PULSES GROUPS, containing an OR input element, whose inputs are connected to the input buses, a Delay element and a serially connected pulse generator, an AND element, a trigger and an indicator, as well as a control channel consisting of a series-connected AND element, a trigger and indicator, characterized in that, d the purpose of expanding the functionality, it additionally introduced three elements AND, two elements NOT, n is an input element SHS delay element, two switches and (n-1) control channels consisting of a series-connected AND element, a trigger and an indicator, the first inputs of the AND elements included in the control channels are connected to the inputs of the p-input element OR, whose output is connected to the first input of the first additional element AND, the second input of which is connected to the output of the second additional element AND, the second inputs of the elements AND, the ENTRANCE of the control channels, and the first INPUT of the third additional element I, the second input of which is connected to the first contact of the first the switch and the output of the first element is NOT, the input of which is connected to the output of the first additional element; nta I and, through the delay element, to the second contact of the first selector, the switching contact of which through the serially connected pulse generator and the second element is NOT connected to the first input of the second additional element I, The second V5SOD of which is connected through a delay element to the third input of the second additional element I, the output bus and the switching contact of the second switch, the first The second contact is connected to the second output of the trigger, the second input of which is connected to the output of the third additional element AND and the second. the inputs of the triggers included in the control channels, the second outputs of which are connected to the inputs of the additional p-input element OR, the output of which is connected to the second input of the element I.

Description

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The invention relates to an impulse technique and can be used to control the operation of storage devices on a magnetic tape. A device for monitoring groups of information pulses, made in the form of a two-beam oscilloscope, the inputs of which are connected to information buses of storage device 1, is known.

A disadvantage of this device is low productivity when monitoring and adjusting a tape drive to compensate for the misalignment of a line of information, for which multiple checks and adjustments of all recording and playback channels are required relative to one conventionally adopted as a standard, as well as analysis of the total signal from all channels.

The closest to the technical essence of the invention is a device for controlling the time of dispersion of groups of pulses, containing serially connected p-input element P1LI, delay element, pulse shaper, first AND element, trigger and indicator, as well as serially connected h-input element AND , the second element is And, the trigger jH indicator, while the input buses are connected to the inputs of the p-input elements OR and And, whose inputs of the same name are connected to each other by the output of the p-input element AND connected to the second input the first element is And, and the output of the first trigger is connected to the second input of the second element And 2.

However, the known device cannot be used to control the data storage devices on a magnetic tape, since it does not provide the possibility of determining the reversal of the line of information in the storage device to ensure adequate compensation. With the help of a known device, a complete quality control of the magnetic tape cannot also be carried out due to the impossibility of determining a specific track with a defect.

The purpose of the invention is to expand the functionality of the device.

The goal is achieved by the fact that in the control device

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groups of information pulses containing an n-input OR element, whose inputs are connected to input buses, a delay element, and successively connected impulse driver, And element, trigger and indicator, as well as a control channel consisting of AND element, trigger and indi10, additionally introduced three elements. And, two elements NOT, / n-input element OR, delay element, two switches and (n-1) control channels, consisting of consecutively connected elements AND, a trigger and an indicator, with the first inputs of the elements AND control channels connected to the inputs of the p-input of the RSHI element,

20 output of which is connected to the first input of the first additional element And, the second input of which is connected to the output of the second additional element And the second

25 inputs of AND elements entering into

the composition of the control channels, and the first input of the third additional element And, the second input of which is connected to the first contact of the first

30 switch and the output of the first element NOT, the input of which is connected to the output of the first additional element I and, through a delay element, to the second contact of the first .J5 switch, the switching contact of which through the serially connected pulse shaper and the second element are NOT connected to the first input of the second optional 40 element And, the second input is through the delay element connected to. the third input of the second additional element I, the output width and the switching contact of the second switch, the first contact of which is connected to the second output of the trigger, the second input of which is connected to the output of the third additional element And and the second inputs of the triggers, the second outputs which are connected to the inputs, add; oh h-input element OR, the output of which is connected to the second input of the element I.

55 Figure 1 shows the functional diagram of the device for monitoring groups of information pulses j in Figures 2 and 3 - timing diagrams explaining

operation of the device in the modes of checking the drive and checking the quality of the magnetic tape.

A device for monitoring groups of information pulses contains an G1 input element OR. 1, the inputs of which are connected to the input buses 2, delay element 3 and pulse generator 4 connected in series, element 5, trigger 6 and indicator 7, as well as a control channel consisting of series connected elements AND 8, trigger 9 and indicator 10 as well as additionally introduced three elements AND 11-13, elements NOT 14 and 15, p-input element OR 16, delay element 17, two switches 18 and 19 n C-1) control channels consisting of AND 8 elements connected in series , trigger 9 and indicator 10, with the first inputs of elements And 8, in connected to the control channels, are connected to the inputs of the n-input. the element OR 1, the output of which is connected to the first input of the first additional element AND 11, the second input of which is connected to the output BTopioro of the additional element AND 12, the second inputs of the elements AND 8 that are part of the control channels and the first input of the third additional element And 13, the second the input of which is connected to the first contact of the first switch 18 and the output of the first element NOT 14, the input of which is connected to the output of the first additional element 11 and through the delay element 3 to the second contact of the first switch 18, crossing The switching contact is connected through a series-connected pulse shaper 4 and the second element NOT 15 is connected to the first input of the second additional element 12, the second input of which through the delay 17 is connected to the third input of the second additional element 12, the output 1LINE 20 and the switching contact of the second the switch 19, the first contact of which is connected to the second output of the trigger 6, the second input of which is connected to the output of the third additional element And 13 and the second inputs of the trigger 9 included in als control, the second outputs of which are connected to

the inputs of the additional p-input element OR 16, the output of which is connected to the second input element AND 5

The device works as follows.

For checking the accumulator, the switch 18 is set to the position where the output of the delay element 3 is connected to the input of the pulse driver 4. The switch 19 is open in this mode.

The group of information pulses, read from all the tracks of the magnetic tape and forming a line of information, comes from the input bus 2 (FIG. 2 and B) to the inputs of the elements AND 8 control channels and the h-input element OR 1, the leading edge of the first received pulse through the element RSHI 1, the element 11 and the delay element 3 starts the pulse shaper 4 (Fig.26, d, 5)., The pulse from the output of the imaging device 4, the passage through the element 15 and the element 12, locks the element 11 (Fig. 2e; {:), preventing the generator from being restarted by other pulses of this system. and AND gate 13 (Figure 2) to permit the setting operation trigger signal 9 in a single state (fig.2z) and 8 elements and control channel (FIG. 2 k, l) ,.

Thus, only the pulses from the incoming line to the device are written to the triggers of the 9 conrol channels (Fig. 2m, n), the leading edges of which lag behind the first by a time less than the delay time of the delay element 3, which is determined by the skew information tolerance. from the condition of normal operation of the tape drive,

If at least one of the flip-flops 9 is not set to one (fig.2n) and the corresponding indicator 10 remains off, then the unit potential from the zero output of this flip-flop through the element IL-16 (fig.2B) resolves through the And 5 element the setting of the trigger 6 in a single state by a pulse from the output of the imager 4, i.e. turning on the indicator 7. During steady-state movement of the magnetic tape in the drive (on the bus 20 unit potential), the device returns to its initial state after analyzing each line of information at the output of element 13 (Fig. 2k); a pulse of resetting of the flip-flops 6 and 9 is generated; from the moment of termination of the impulse of the imaging unit 4 until the arrival of the first impulse by the following line (Fig. 2e). Thus, the switch-on time of the device triggers during one cycle, and consequently, the average indications of the indicators with sufficiently long operation of the device with the drive (Fig. 2, n) (for example, the average light indicators) are determined by the duration ;; pulse generator 4, which is chosen equal to 0.7-0.8 of the period following the information lines. According to the status of indicators 7 and 10, the numbers of the channels that need to be tuned are determined. With the appropriate adjustment in the accumulator, the maximum readings of all indicators of the 10 control channels and the minimum indication of the indicator 7 are obtained, which indicates the correct setting of the storage device on the magnetic tape. At. checking the quality of the magnetic tape, the switch 18 is set to the position where the output of the element HE t4 is connected to the input of the pulse shaper 4 pulses. In this case, the shaper 4 is triggered by the falling edge of the last of the pulses of the line coming from the input of the device, through the element OR 1, the element 11 and the element 14, NOT 14 (fig. 3 01.5, b, d, e). It is the same as when checking the accumulator, except for the choo trigger 6 and the indicator 7 are turned on when there is a poor-quality section of the magnetic tape. This is determined by the absence of a playback signal on any channel (magnetic tape track) (Fig.ZB) under the condition of recording 1 on all channels simultaneously. In this case, when the switch 19 is closed, the zero potential from the output of the trigger 6 (FIG. ER) through the element 12 and blocks the insertion of new information in the triggers 9, the generation of a reset signal and stops the movement of the magnetic tape (fig.3c). With the indicator 10 turned off (Fig. 3m), the number of the defective tape track is determined. Positions e,, z, and, k, L, H | -o, n FIG. 3) correspond to the positions of e, g, s, and, k, l,, o, n Figure 2. Dp of continuing the movement of the magnetic tape and operating the device briefly opening the switch 19. The delay element 17 serves to block the entry of information into the flip-flops 9 when the magnetic tape does not move, determined by the acceleration time of the driving motor to the nominal speed UA record-play tape drives, and also determine the defective track of the tape in order to distribute its functional possibilities. zhnost In addition, there is an increase in the productivity of work when monitoring pulse sequences by automatically returning the device to its initial state at the end of each cycle and making it possible to determine by the indicator of the channel that requires tuning.

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Claims (1)

DEVICE FOR MONITORING INFORMATION PULSE GROUPS, comprising an η-input OR element, the inputs of which are connected to input buses, a Delay element and a pulse shaper connected in series, an AND element, a trigger and an indicator, as well as a control channel consisting of an AND element connected in series, a trigger and indicator, characterized in that, in order to expand the functionality, three additional AND elements, two NOT elements, an η-input OR element, a delay element, two switches and (p-1) channel are additionally introduced into it s control, consisting of a series-connected element And, a trigger and an indicator, and the first inputs of the elements included in the control channels are connected to the inputs of the η-input element OR, the output of which is connected to the first input of the first additional element And, the second input of which is connected to the output of the second additional element And, the second inputs of the elements And included in the control channels, and the first input of the third additional eluent And, the second input of which is connected to the first contact of the first switch and the output of the first element NOT, the input of which is connected to the output of the first additional element And and through the delay element, to the second contact of the first switch, the switching contact of which through the serially connected pulse former and the second element is NOT connected to the first input of the second additional element And, the second the input of which through the delay element is connected to the third input of the second additional element And, the output bus and the switching contact of the second switch, the first contact of which union of a second output flip-flop, a second input connected to the output of the third and additional element and the second inputs of flip-flops included in coc Tav control channels whose second inputs are connected to the additional inputs in the-input OR gate whose output is connected to the second input element I. 1 I 129728 2