SU1350841A2 - Device for measuring domination of discrete signals - Google Patents

Abstract

The invention is an improvement of the invention according to the author, St. No. 879805 and provides an indication of the direct value of the magnitude of the predominance, regardless of their sign. The device contains triggers 1, 9, 16, an allocator, alternating sign 2, delay element 3, master oscillator 4, elements AND 5, 7, в, - 17, 18, elements ШШ 11, 15, 19, counters 6, 12, reversible counter 10, the code converter 13 and the display unit 14. The incoming digital signal with the help of flip-flop 1 is converted into a signal with steep edges and a calibrated amplitude. From its outputs, signals of positive and negative polarities are received through acc. elements AND 17, 18 and through element OR 19 to the selector of alternating sign 2, passing polar signals through one of the elements And 17, 18 sets the trigger 16, the state of which changes the transition signal from the state - O to the state of the highest bit code converter 13. A change in the state of trigger 16 changes the polarity of the parcels being analyzed, which leads to a change in the sign of the predominance of the parcels. So, the state of the trigger 16 carries information on the sign of the predominance. Introduced trigger 16 and elements And 17, 18, OR 19. 1 Il. (Lk)

Description

The invention relates to telecommunications, can be used to measure the predominance of discrete signals in the transmission of digital information, and is an improvement of the invention by the author. St. No. 879805,

The purpose of the invention is to indicate the direct value of the magnitude of the prevalence regardless of their sign.

The drawing shows the structural electrical circuit of the device for measuring the predominance of discrete signals.

The device contains the first trig-. ger 1, splitter 2 alternating sign, delay element 3, master oscillator 4, first element 5, counter 6 second element 7, third element 8, second trigger 9, reversing counter 10, first element OR G1, counter 12, code converter 13 , block 14 indications, the second element OR 15, the third trigger 16, the fourth element AND 17, the fifth element AND 18, the third element OR 19.

The device works as follows.

A digital signal from the output of the demodulator (not shown) is fed to the first trigger 1, where it is formed with steep fronts and with a calibrated amplitude. From the direct and inverse outputs of trigger 1, discrete signals of positive and negative polarity arrive at the first inputs of the element 17 and element 18, the second inputs of which receive signals respectively from the direct and inverse outputs of the third trigger 16. Thus, depending from the state of the trigger 16, one of the elements 17 and 18 is closed and the other is open and passes a discrete signal of the corresponding (positive or negative) polarity. The signal from the output of the element And 17 positive polarity or from the output of the element And 18 negative polarity through the element OR 19 enters the allocator 2 alternating signs, from the output, and which has short pulses corresponding to the falling edge of the parcels being analyzed (for example, positive ones) arrive at the element 3 delay. and one of the inputs of the elements And 7 and 8.

The pulses from the output of the master oscillator 4 through the first element And 5 are fed to the counting input of the counter

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five

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6. The second input of the element And 5 receives a discrete signal from the output of the element OR 9, opening it with a positive polarity pos. The conversion factor of the counter 6 is selected from the condition of obtaining at its output a signal with a period Td, where T0 is the duration of the elementary dressing. The voltage from the corresponding outputs of the counter 6 enters the inputs of the elements And 8 and 7, forming the selection zones, respectively, for shortened and elongated dressing. The first inputs of the And 7 and 8 elements are signposts of alternators from the 2 sign alternators, and the fourth input of the And 8 element is the enabling or disabling potential from the output of the trigger 9, which is set to position O with the back front of the dressing from the output of the delay element 3. The position of the Inhibit from the And 8 element is removed after the trigger 9 is set to 5 in position 1 by the signal from the output of the last discharge of counter 6. Such blocking of the And 8 element eliminates the effect of splitting on the measurement of the predominance of the signal.

And ipyls corresponding to the rear edges of shortened inserts from the output of the element And 7 and extended parcels from the output of the element And 8 arrive at the inputs of the Subtraction and Addition of the reversible counter 10. In the presence of pre-. Possession and, depending on their sign, an overflow pulse appears at one of the outputs of the reversible counter 10, which enters either the input Addition or the input Vych0

five

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five

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five

the measurement reversible counter, changing in the latter by 1 in the direction of either increasing or decreasing the recorded. up to this code number. In the initial state in the counter 6, a code number 00, ... O is set, which the front of the parcel from the output of the delay element 3 is rewritten into the counter 6 and is the starting point of the time scale when changing the feed. If the permanent predominance of sowing is equal to O, then the probability of occurrence of rear fronts in the selection zones is 0.5 and the overflow pulse at the outputs of the reversible counter 10 is absent.

If the predominance of the output from the element 1 19 19 is negative (shortened dressings), then the probabilities of the appearance of fronts in the selection zones are not equal to each other and the overflow pulse arrives at the input of the code converter 13, recording the number 1 in the last one, counter 6 is shifted in advance towards 1%. Adding overflow pulses to the input The addition of the code converter 13 and the time scale shift in counter 6 is performed until the shift value is compared with the value of the predominance of discrete signals, which corresponds to the recorded code number in the measurement reversing counter. At a shift step of 1%, the code converter 13 and the counter 6 consist of two binary-decimal decades. Information about the amount of dominance from the output of the code converter 13 is fed to the inputs of the display unit 14, which indicates the amount of prevalence in percent.

If the analyzed parcels (positive polarity) from the output of the element OR 19 have a positive predominance (corrected), then the overflow pulse from the output of the reversible counter 10 enters the input of the code converter 13, writing the code number 10011001 (99) into the input, which corresponds to the prevalence of 1%. The transition of the higher bit of the code converter 13 from the state O to the state 1 is fed to the input C of the I6 trigger and translates it to another state. Changing the state of the trigger 16 changes the polarity of the analyzed parcels, which leads to a change in the sign of the predominance of the parcels from the output of the element OR 19 and the overflow pulse enters the code converter 13 to the input Addition, Receipt of overflow pulses to the input Addition and shift of the timeline in the counter 6 Evi n

Editor V, Petrash Tehred M. Khodanych Proofreader G, Reshetnik

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Order 5299/57 Circulation 636 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab, d, 4/5

Production and printing company, Uzhgorod, st. Project, 4

until the moment of comparing the magnitude of the shift with the magnitude of the predominance. The trigger state 16 carries information about the sign of dominance. If at the direct output of the trigger 16, the voltage corresponds to 1, then the predominance has the sign - if it corresponds to O, then the predominance has the sign +,

At the same time, the pulses from the outputs of the AND 7 and 9 elements through the OR 11 element arrive at the counting input of counter 12, and the pulses from the outputs of the reversible counter 10 through the OR element 15 to the zeroing input of counter 12, the capacitance K of which is determined by the shift (sampling) prevalence scale. If during the analysis of K parcels, the reversible counter 10 has not reached overflow, then it is reset to its original position by an overflow pulse from the output of counter 12,

Claims (1)

Formula isobteni A device for measuring the predominance of discrete signals according to the authors, 879805, characterized in that, in order to indicate the direct value of the magnitude of the prevalence regardless of their sign, the fourth and fifth elements AND, the third OR element and the third trigger, direct the output of the first trigger is connected to the input of the selector alternating connected fourth element AND and the third element OR, the second input of which is connected to the output of the fifth element AND, the first input of which is connected to the inverse output of the first trigger, The second input of the fourth and fifth elements I is connected respectively to the direct and inverse outputs of the third trigger, the counting input of which is connected to the output of the higher bit of the code converter, and the direct output to the sign input of the display unit.