SU1277406A1 - Device for measuring error factor - Google Patents

Abstract

The invention relates to telecommunications. The purpose of the invention is to enhance the functionality by providing variable measurement time and an indication of the number of errors. The device contains an error analyzer 1, a time sensor 2, counters 3 and 4, indicators 5 and 6, a divider 7 with a variable division factor, a key 11. The shaper 8 of the initial setup code, the reversible counter 9, the control unit 10 are newly entered. The measurement process ends with a count in the range for which the criterion for providing the specified accuracy and measurement error is fulfilled. Such a criterion is the number of recorded errors randomly distributed over time. For example, for a accuracy of 0.95 and an error of ± 20%, the criterion for stopping a measurement is the registration of 96 errors. Unit 10 generates a pulse of the initial setup, the control potential and ensures the operation of the device in the mode of automatic or manual setting of the measurement time. In the automatic installation mode, the measurement is terminated when the content of the counter 3 conforms to the established criterion for the arrival of the next impulse from the sensor 2. In the manual installation mode, the measurements are terminated after the end of the specified time interval.

Description

The invention relates to telecommunications and can be used to assess the quality of information transmission in discrete communication channels.

The purpose of the invention is to enhance the functionality by providing variable time measurement and indication of the number of errors,

The drawing shows a structural electrical circuit of the proposed device.

The device for measuring the error rate contains an error analyzer 1, a time sensor 2, the first and second counters 3 and 4, the first and second indicators 5 and 6, a divider 7 with a variable division factor, an initial setup code generator 8, a reversible counter 9, block 10 control and key 11,

The device works as follows

At the initial time, the signal from the second output of the control unit 10 nullifies counters 3 and 4, the time sensor 2 starts, the indications of the preceding measurement disappear from indicator 5 and 6. The code combination from the generator 8 is recorded in the reversible counter 9. At the same time, the state of the first output of the control unit 10 changes, which, passing to the control input of the key 11, permits the passage of pulses from the analyzer 1. The analyzer 1 detects errors in the sequence supplied to the input of the device, forms at its output, connected to the input of the divider 7, the number of pulses proportional to the number of errors in the sequence. These pulses, after passing the key 11 and the divider 7, which at this stage does not change their frequency, are received at the input of the counter 3, recalculated by it, and the result of the counting is displayed by the indicator 5. Before the overflow of the counter 3 on the indicators 5 and 6 the number of registered ones is highlighted; errors in the form of A,. .A, where and is the number of decimal places in counter 3. This result is indicated until counter overflows 3 or until the end of the measurement.

When an error in the input sequence equals 1-10, counter 3 at its output overflow generates a pulse

-

about

m d and

20

25

overflow, which, arriving at the subtracting input of the reversible counter 9, subtracts the unit from its Content, arriving at the counting input

5 of the counter 4, adds one to its contents and, arriving at the input of the installation 100 ... O itself of the counter 3, sets it to the state 100 ... O. This leads to the installation of the number 100 on the indicators 0 indicators. corresponding to the number of errors registered at this time. Similarly, the device is triggered with each overflow of the counter 3, while increasing by one the value of the exponent of the displayed number.

Due to the fact that the outputs of the counter 4 are connected to the control inputs of the divider 7 with a variable division factor, the division ratio of the latter in the measurement process changes the division ratio of the number of pulses at the input (the number of detected errors) in accordance with the current result of the summation of the counter 4 .

The measurement process ends with a count in the range for which the criterion for providing the specified accuracy and measurement error is fulfilled. Such a criterion is the number of logged {errors randomly distributed over time. For example, for

55 confidence 0.95 and error

The ± 20% criterion for stopping a measurement at the end of the current range is the registration of 96 errors.

40 The control unit 1 Oj, taking on its group input the code from the output of the counter 3, monitors its state and, if the code corresponds to number 96 according to the signal from the sensor 2 time; J5, it changes the state of its first output, thereby prohibiting the passage error pulses through the key 11. At the same time, the code from the output of the reversible counter 9, supplied to

The Q D-inputs of counter 4, according to the potential change at its C-input, are rewritten to its output, displayed on the indicator 6 as an indicator of the degree of the error rate, replacements previous55 BELOW reading is the degree of the number of errors. In the reversible counter 9, the formation of the value of the exponent of the error rate coefficient occurs simultaneously with the formation of the exponent of

la errors in the counter 3 in accordance with the following rule.

one

where r is the number corresponding to the code set by the format Lem 8;

error rate;

jj is the number of pulses at the output of time sensor 2, numerically corresponding to the number of the measurement time range.

The time sensor 2 carries out the issuance of pulses of the end of the measurement time interval, counted from the moment of arrival of the zeroing pulses from the control unit 10, the magnitude of the intervals of each range is equal to

pi

Tp

ten

- range order number

measurement time; - measurement time for the first range, 0

 -"-Where

f - clock

pulse frequency of the input sequence under investigation. The control unit 10 generates a pulse of the initial setting, the control potential and ensures the operation of the device in the mode of automatic or manual setting of the measurement time. In the automatic installation mode, the measurement is terminated when the contents of the counter 3 correspond to the established criterion upon the arrival of the next pulse from sensor 2. In the manual installation mode, the measurements are terminated after the end. Compiler V. Slepakov I. Casard editor Tehred L. Oleinik Proofreader A. Ilyin

6761/57

Circulation 624 Subscription

VNIIPI USSR State Committee

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

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

774064

SRI ahead of a specified time interval (measurement range).

Claims (2)

The invention relates to telecommunications and can be used to assess the quality of information transmission in discrete communication channels. The purpose of the invention is to expand the functional capabilities by providing a variable time for measuring and indicating the number of errors. The drawing shows a structural electrical circuit of the proposed device. The device for measuring the error rate contains an error analyzer 1, a time sensor 2, the first and second counters 3 and 4, the first and second indicators 5 and 6, a divider 7 with a variable division factor, an initial setup code generator 8, a reversible counter 9, a block 10 control and key 11, the device operates as follows. At the initial time, the signal from the second output of the control unit 10 nullifies counters 3 and 4, sensor 2 starts up, C indications 5 and 6 disappear the indication of the previous measurement. The code combination from the generator 8 is recorded in the reversible counter 9. At the same time, the state of the first output of the control unit 10 changes, which, passing to the control input of the key 11, permits the passage of pulses from the analyzer 1. The analyzer 1 detects errors in the sequence supplied to the device input, forms at its output, connected to the input divider 7, the number of pulses proportional to the number of errors in the input sequence. These pulses, after passing the key 11 and the divider 7, which at this stage does not change their frequency, are received at the input of the counter 3, recalculated by it, and the result of the counting is displayed by the indicator 5. Before the overflow of the counter 3 on the indicators 5 and 6 the number of registered ones is highlighted; errors in the form of A,. .A, where and is the number of decimal places in counter 3. This result is indicated until counter overflows 3 or until the end of the measurement. When the number of errors in the input sequence is 1-10, counter 3 at its overflow output generates an overflow pulse, which, arriving at the subtracting input of the reversing counter 9, subtracts from its Contents unit, arriving at the counting input of counter 4, adds unit to its content and, entering the input of the installation 100 ... O of the meter 3 itself, sets it to the state 100 ... O. This leads to the installation of the number 100 on the indicators.,. corresponding to the number of errors registered at this time. Similarly, the device is triggered with each overflow of the counter 3, while increasing by one the value of the exponent of the displayed number. Due to the fact that the outputs of the counter 4 are connected to the control inputs of the divider 7 with a variable division factor, the division ratio of the latter in the measurement process changes the division ratio of the number of pulses at the input (the number of detected errors) in accordance with the current result of the summation of the counter 4 The measurement process ends with a count in the range for which the criterion for providing the specified accuracy and measurement error is fulfilled. Such a criterion is the number of logged {errors randomly distributed over time. For example, for a accuracy of 0.95 and an error of ± 20%, the criterion for stopping a measurement at the end of the current range is the registration of 96 errors. The control unit 1 Oj, receiving a code from the output of the counter 3 on its group input, monitors its state and, when the code corresponds to number 96, the signal from time sensor 2 changes the state of its first output, thereby prohibiting the passage of error pulses through the key 11. At the same time, the code from the output of the reversible counter 9, fed to the D inputs of counter 4, according to the potential change at its C input, is rewritten to its output, displayed on the indicator 6 as an indicator of the degree of error rate, replacing the previous indication No number of errors. In the reversible counter 9, the formation of the value of the coefficient of the error rate coefficient occurs simultaneously with the formation of the degree of the number of errors in the counter 3 in accordance with the following rule. 1 where vol is the number corresponding to the code set by the format Lem 8; error rate; jj is the number of pulses at the output of time sensor 2, numerically corresponding to the number of the measurement time range. The time sensor 2 performs the output of the pulses of the end of the measurement time interval, counted from the moment of arrival of the zeroing pulses from the control unit 10, the magnitude of the intervals of each range is equal to the value where h is the sequence number of the measurement time range; T is the measurement time value for the first range, 0 T. - „- f - the pulse frequency of the pulse of the input sequence under investigation. The control unit 10 generates a pulse of the initial setting, potential. control and ensures the operation of the device in the mode of automatic or manual setting of the measurement time. In the automatic setting mode, the measurement is terminated when the contents of the counter 3 match the established criterion for the arrival of the next pulse from the sensor 2. In the manual setting mode, measurements are terminated at the end of the 064 SRI in advance of the specified time interval (measurement range). The invention The device for measuring the error rate, containing a time sensor, serially connected Error Analyzer, key, divider with variable division factor, first counter and first indicator and serially connected second counter and second indicator, the input of which is connected to the variable divider control input the overflow output of the first counter is connected to the counting input of the second counter, characterized in that, in order to expand the functionality of the Providing a variable measurement time and error number indication, a control unit and a sequentially connected initial setting code generator and a reversible counter are entered into it, the first output of the control unit is connected to the control input of the key, to the zero input of the first counter, and to the Correspondence input of the second counter, The second output of the control unit is connected to the C input of the reversible counter and to the zero input inputs of the second counter and time sensor, the output of which is connected to the first input of the control unit and to the input is folded and a reversible counter, the input of which subtraction is connected to the installation. an input and an overflow output of the first counter, the output of which is connected to the second input of the control unit, and the output of the reversible counter is connected to the D input of the second counter.