SU1499520A1

SU1499520A1 - Device for measuring distortion of synchronous telegraph signals

Info

Publication number: SU1499520A1
Application number: SU884357135A
Authority: SU
Inventors: Николай Петрович Галкин
Original assignee: Предприятие П/Я Г-4492
Priority date: 1988-01-04
Filing date: 1988-01-04
Publication date: 1989-08-07

Abstract

Изобретение относитс к электросв зи. Цель изобретени - повышение надежности работы устройства. Устройство содержит задающий генератор 1, блок 2 добавлени и вычитани , делитель 3 частоты импульсов, распределитель 4, формирователи 5 и 9 зон отставани и опережени , реверсивный счетчик 6, блок 7 индикации, выделитель 8 фронтов посылок, элементы И 10 и 11, делитель 12 коррекции с переменным коэффициентом делени , измерительный реверсивный счетчик 13, усредн ющий реверсивный счетчик 14, триггер 15 и переключатель 16. Цель достигаетс за счет устранени погрешности отсчета путем автоматического корректировани частоты генератора 1 с помощью введенных формировател 9, элементов И 10 и 11 и счетчика 14. 1 ил.The invention relates to telecommunications. The purpose of the invention is to increase the reliability of the device. The device contains a master oscillator 1, a block 2 for adding and subtracting, a divider 3 pulse frequencies, a distributor 4, shapers 5 and 9 lagging and advancing zones, a reversible counter 6, a display unit 7, a selector 8 parcel edges, elements And 10 and 11, a divider 12 variable division correction factor, measuring reversible counter 13, averaging reversible counter 14, trigger 15 and switch 16. The goal is achieved by eliminating the counting error by automatically correcting the frequency of generator 1 by entering s shaper 9, AND gates 10 and 11 and counter 14. The 1-yl.

Description

распределител 4 и вьщелител 8 фрон-се когда расфазировка не превышаетdistributor 4 and allocator 8 front-ce when dephasing does not exceed

тов посыпок определ ютс периоды времени , в течение которых в реверсивном счетчике 6 производитс сложение либо.вычитание импульсов, поступающихTo determine the dressing, the periods of time are determined during which in the up-down counter 6 is added or subtracted.

(0,05 - O,I)TO. После уменьшени расфазировки до такой величины менты И 10 и 11 по вторым входа крываютс сигналами с выхода вт(0.05 - O, I) TO. After decreasing the skew to such a value, the cops And 10 and 11 at the second entrance are covered with signals from the output of watts.

(0,05 - O,I)TO. После уменьшени расфазировки до такой величины элементы И 10 и 11 по вторым входам открываютс сигналами с выхода второго(0.05 - O, I) TO. After reducing the skew to such a value, the elements And 10 and 11 on the second inputs are opened with signals from the output of the second

формировател 9 и фронты посылок через первый 10 и второй 11 элементы И поступают на вход сложени или вычитани усредн ющего реверсивного счет чика 14 в зависимости от знака рассогласовани по частоте. Импульс переполнени на выходе усредн ющего реверсивного счетчика 14 поступит на вход сложени (вычитани ) измери- тельного реверсивного счетчика 13, увеличива (уменьша ) записанное в нем кодовое число на 1. Это увеличение (уменьшение) кодового числа трансформируетс в увеличении (умень шении) количества импульсов, посту- пающих на вход блока 2 с выхода делител 12. В измерительном реверсивном счетчике 13 записываетс такое число, при котором веро тности по в- лени импульсов опережени и отставани на выходе элементов И 10 и 11 одинаковые, т.е. опорна частота на выходе блока 2 равна частоте задающего генератора на передающей сторо- не. Информаци измерительного реверсивного счетчика 13 поступает в блок 7 индикации. Записанное в измерительном реверсивном счетчике 13 число определ ет .величину и знак рас- стройки по частоте.shaper 9 and the fronts of parcels through the first 10 and second 11 elements And are fed to the input of the addition or subtraction of the averaging reversing counter 14, depending on the sign of the frequency mismatch. The overflow pulse at the output of the averaging reversible counter 14 is fed to the input of the addition (subtraction) of the measuring reversible counter 13, increasing (decreasing) the code number written in it by 1. This increase (decrease) of the code number transforms into an increase (decrease) in the number pulses received at the input of block 2 from the output of the divider 12. In the measuring reversible counter 13, a number is recorded at which the probabilities of the pulses of advance and lag at the output of the elements And 10 and 11 are the same, i.e. the reference frequency at the output of block 2 is equal to the frequency of the master oscillator on the transmitting side. The information of the measuring reversible counter 13 enters the display unit 7. The number recorded in the measuring reversing counter 13 determines the magnitude and sign of the frequency detuning.

Claims

The elimination of false readings when switching the limits of measurements is as follows. One input of the trigger 15 through the switch 16 (one switch is shown on the switch) is applied to the ground potential, which prepares the installation of the trigger 15 with a signal from the first driver 5 to allow the normal operation of the display unit 7. Disabling the potential of the earth sets the trigger 15 to the state that prohibits the ignition of the indicators and ensures that the previous readings in block 7 are reset. After the switch 16 is set to a new position, the signal from the output of the first driver 5 sets the trigger 15 to a state that allows - elements below in block 7, claims

A device for measuring distortion of synchronous telegraph signals.

g 5 0 5 about

about with

five

containing a variable division divider correction divider, display unit, trigger, switch, serially connected master oscillator, addition and subtraction unit, pulse frequency divider, distributor, backward and forward zone driver, reversible: counter, whose code is connected to the second input of the addition unit and subtracting, the third input of which is connected to the output of the correction divider with a variable division factor, the input of which is connected to the additional output of the master oscillator, the first The code of which is connected to the second input of the reversible counter, the measuring reversible counter, the information outputs of which are connected to the control inputs of the correction divider with a variable division factor and to the information inputs of the display unit, the edge selector of the parcels whose output is connected to the corresponding input of the display unit and the second input the former of the lagging and advancing zones, the second output of which is connected to the first input of the trigger, the second input of which is connected to the outputs of the switch, and the output the trigger and the output of the distributor are connected to the corresponding display inputs, characterized in that, in order to increase the reliability of the device, a second driver for the lag and advance, the first and second elements AND and the averaging reversing counter are introduced, while the inputs of the second lag and advance zone driver and the first and second outputs of the second driver of the lag and advance zones, respectively, through the first and second elements AND, the second inputs of which are from Uniform yield extractor fronts parcels are connected respectively to the inputs of the adding and subtracting the averaged guide down counter, overflow outputs of which are connected to the inputs of the adding and subtracting measuring down counter.