SU1494239A1 - Boundary distortion meter - Google Patents

Abstract

The invention relates to telecommunications. The purpose of the invention is to improve the measurement accuracy. The marginal distortion meter contains a matching unit 1, specifying rr 2, a unit of forming significant moments, a counting unit 4, a memory block 5 and 6, a comparison block 7 and 8, a HE 9 block, a mode setting block 10, a decoder 11 , e-mails OR 12 and 13, trigger 14, and e-mails AND 15.16 and 17. The goal is achieved by performing a separate fixation of the edge distortions of different signs. 1 il.

Description

Inventions (5 s; to electro; and chi can also be iicnojn. JoBa but for measuring the edge distortions in telepa r (J) iibrx caiplx sn gey).

The goal and ilbrätspi is to increase the accuracy of the incidence by adjusting the regional distortions of various images.

H, and the drawing shows the

The circuit is functional.

The edge distortion meter contains a matching unit 1, I ask) 111 generator 2, block 3 forms 1 of significant moments, block 4 counts, HCUBba J and second blocks 5 and 6 of memory, the first and HTS1PO blocks 7 and 8 of the comparison element HE 9 , block 10 installation modes, delifrats 1 1, the first and second elements I. In 12 and 13, the trigger 14, the first - the third elements And 15 - 17.

The device works in the following way.

PexaiM device operation sets

block 10. When measuring and registering {and all the edge distortions, their installation odes of trigger 14 from block 10 cch:) the lempers OR 12 and 13 are signaled in such a way that in the selected session time the trigger 14 finds .is in a single state. So, for example, for RS-flip-flop 14 with G1p, we n1 control input and we need to send a constant

YANNY11 are rare; a signal on the S-in and a constant zero signal on the R-input. In this case, the signals arriving at the second inputs; 1, s of the elements OR 12. and 13 with ale (AND 16 and 17, do not affect the operation of the toigger.

With the arrival of the first after the beginning of the session of the input signal from the mucus channel, the matching unit 1 starts the block 3, running 11, for example, in the form of a trigger, sets it to a certain state (for example, one). Unit 3 controls the operation of unit 4 of the account. which is a reverse counter, i.e. determines the direction of the counting - the addition or subtraction of the clock and mils coming from the master oscillator 2. Initially, the counting unit 4 works on addition. Having counted out the number of clock pulses corresponding to 50% of the duration of the elementary code message of the signal, the block 4 of the count results in the transfer signal, which arrives at

Q

50

five

0

five

Q

5 Q

b.yuk 3, having switched its n opposite state, while from block 3 to block 4 of the counting a signal arrives; kln) of his 150dia in the mode of subtraction of clock pulses. Having counted to zero, the counting unit 4 switches the block 3, and as a result, its mode, and starts working again on addition, and so on. In this way, a grid of reference time samples is created within the duration of each elementary codebook of the input signal.

With the arrival of the actual real time of the first moment of the signal (sometimes it is called the actual characteristic moment of recovery) the matching unit 1 generates a pulse, through the open first element 15 and goes to the first control inputs of the first and second blocks 5 and 6 of memory, to the second the control inputs of which receive signals from block 3 and PC element 9, which serves as an inverter, i.e. at any time, it is possible to record information only in one of blocks 5 and 6 of memory. In memory block 5, recording is possible only in the interval corresponding to the unit state of block 3 (the addition mode of the counting block), i.e. In memory block 5, positive values of edge distortions are recorded or, otherwise, delays of significant significant recovery points relative to the reference values of their recovery points (hereinafter referred to as positive edge distortions). Likewise, only negative marginal distortions are recorded in memory block 6. The specific value of the edge distortion recorded in one of the blocks 5 and 6 of the memory is determined by the moment of arrival of the pulse from the element 15, i.e. true meaningful recovery moment (DZMV). ) In the corresponding 1-n 1 block 5 or 6 of the memory, the state of the block 4 is recorded. The information from the memory blocks is decrypted by the decoder 11 and provided to the recipient in the desired form.

When measuring maximum values of edge distortion, trigger 14 is controlled by signals from elements 16 and 17. At the same time, block 10 is set to such a state as not to affect the operation of the device (in this case, its output

Dows must arrive at the inputs of the 1SH 12 and 13 terminals (zero potentials).

Let us consider in more detail the operation of the circuit in this mode.

The device cocTOHfine nodes are reset: zero distortion values are recorded in blocks 5 and 6 of memory, trigger 14 is in one state, unit 3 is also, counting unit 4 starts to work on addition from the first since the beginning of the DZMV measurement.

Suppose, in the initial part of the session, the DZMZ coincides (within the resolving power of the meter) with the reference computer (EELV). By the time this DZMV arrives, unit 3 is in the zero state. The counting unit 4 counts up to a nude and, since the contents of the memory unit 6 are zero, the second comparison unit 8 is activated and through the third element AND 17 and the second element OR 13 sets the trigger 14 to the zero state. At the same time, when the counting unit reaches zero, block 3 is switched and gives the PULSE to the control input of the first memory block 5. From the first comparison unit 7, the pulse is also fed to the input of the trigger 14 via the second AND 16 and the first element OR 12. This pulse sets the trigger 14 to the one state. The pulses of the first and second elements OR 12 and 13 come either simultaneously, or the pulse from the second element OR 13 is delayed by a negligible time determined by the propagation of the signal along the chain of blocks 3 and 5. In the first case (with simultaneous input of signals on the trigger inputs 14 ) it does not compare at all; in the second case, its time in the zero state is much less than the resolution of the device and does not cause disruption of its operation.

Suppose the following DEVM is lagging behind in time from the corresponding EVWM. At the moment of its arrival, block 3 is in the single state, block 4 of the counting works on addition, therefore, information from it is recorded in a memory block 5, fixing positive marginal -i distortion 1 (in this case, fixed + M). the time interval corresponding to the duration between;

) 239

COLLECTION OF EZVM, FIRST OF SNF I. rpi:; i does not work two; k; .y. n km; r equal to zero cocTojiuisn b:; about h of the count (until a bullet value is recorded in block 5); and n g — yuchp of the arrival of the DZMV (it records h of the memory 5 and automatically immediately the first BLDt block 7 match by coincidence

10 values of the block 4 of the account and block 5 gives the signal). However, this signal does not change the state of flip-flop 14, since it is intended to set it to one state, and the flip-flop

15 14 is already in it. Similar reasoning also occurs with the following DZMV, the marginal distortions of which are more in absolute value and the same in sign with + L 1. If

20 further, the marginal distortions of this sign are less than + L 1 or absent. TOj although two impulses are removed from the output of the first block 7, symmetrically located relative to 25 EMPW (due to the coincidence of the value recorded in the first memory block 5, and the value of the count block 4 when counting backward (subtraction) and forward (complex) directions x, on the trigger

30 14 through the second element AND 16 receives only a pulse, which coincides with the mode of addition of account block 4, which is determined by the resolving signal from block 3 to the second input of the second element 16. Also, if further distortions of this sign are less recorded in the first block 5, then at the moment of their arrival, the trigger 14 is in the zero state and prevents them from being written to the first block 5 of the memory.

The fixation of negative maximum edge distortions is carried out similarly. Only difference

jc is that there is no double triggering of the second comparison unit 8 for the appearance of a new maximum value of negative marginal distortion, since in the computation mode of the counting unit 4 it first reaches the new value of the marginal distortion (negative) and then zero (or less). absolute value) at which the addition is not carried out, since in the BTODOM memory unit 6 a new, more in absolute value, edge distortion value has already been recorded.

35

7

Thus, the trigger 14 is the forbidden zone for recording the n values of the edge distortion (relative to the negative zone is relative to positive), if the absolute value of the recorded values is less than

marks.

Formula of invention

The edge distortion meter that contains the mode setting block, the master generator, the first block of comparison, the trigger connected in series and the first AND element and the consecutively connected matching block, the generating unit of meaningful

eight

0

s

comparison, the second input of which is connected to the output of the first memory block, characterized in that, in order to improve measurement accuracy by separately fixing the edge distortions of different signs, the second element li and the first OR element, whose output is connected to the first trigger input, are inserted, and a series-connected element NOT, a second memory block, a second comparison block, a third AND element and a second OR element, the output of which is connected to the second trigger input, the first and second outputs of the mode setting unit n Connected to the other inputs of the first and second elements, respectively, OR, you

moments, the counting unit, the first unit, the 20th stroke, the motorization unit and the decoder, the output of which is the output of the device whose input is the input of the matching unit, the output of which is connected to another input of the first element, And 25th output of the second to the second input of the second comparison unit, the output of the master oscillator is connected to another input of the counting unit, another output of which is connected to another 30 input of the block for forming significant moments, the output of the counting unit is connected to the first input of the first block

cops are connected to the third input of the memory block, to the first input of the second And element and to the input of the NOT element whose output is connected to another input of the third And element, the output of the counting unit is connected to another input of the second comparison unit and to the second input of the second memory block, the third input of which is connected to the output of the first element I, and the output connected to another input of the decoder, the output of the first comparison unit is connected to the second input of the second element I.

the course of the formation block

cops are connected to the third input of the memory unit, to the first input of the second element And, and to the input of the element NOT, the output of which is connected to another input of the third element And, the output of the counting unit is connected to another input of the second comparison unit and to the second input of the second memory unit, the third input of which is connected to the output of the first element I, and the output connected to another input of the decoder, the output of the first comparison unit is connected to the second input of the second element I.

Claims (1)

To the Formula of the invention An edge distortion meter containing a mode setting unit, a master oscillator, a first comparison unit, a trigger and a first element And connected in series, a matching unit, a significant moment generation unit, a counting unit, a first pass-2 unit (memory and a decoder whose output is the output of the device, the input of which is the input of the matching unit, the output of which is connected to ν to the other input of the first element AND, 2ί the output of the second is connected to the second input of the second comparison unit, the output of the nerator is connected to another input of the account unit, the other output of which is connected to another 3 (input of the unit for generating significant moments, the output of the account unit is connected to the first input of the first comparison unit, the second input of which is connected to the output of the first memory unit, characterized in that, with to increase the measurement accuracy by separately fixing edge distortions of different signs, the second AND element and the first OR element are connected in series, the output of which is connected to the first input of the trigger, and connected in series e element NOT, the second memory unit, the second comparison unit, the third AND element and the second OR element, the output of which is connected to the second input of the trigger, the first and second outputs of the mode setting unit are connected to other inputs of the first and second OR elements, respectively, the output of the forming unit significant moments connected to the third input of the memory unit, to the first input of the second AND element and to the input of the element NOT, the output of which is connected to another input of the third AND element, the output of the counting unit is connected to another input of the second comparison unit and to the second input of the second memory unit, the third input of which is connected to the output of the first element And, and the output is connected to another input of the decoder, the output of the first comparison unit is connected to the second input of the second element I.