SU836813A1 - Device for measuring binary signal predominances - Google Patents

Description

one

The invention relates to telegraphy and can be used to control and adjust synchronous discrete communication channels.

A device for measuring the predominance of binary signals is known, comprising a pulse edge former, the first and second outputs of which are connected to the first inputs of the first and second frequency tuning blocks, respectively, the second inputs of which are connected respectively to the first and second outputs of the reference signal generator, trigger, first input to It is expensively connected to the output of the first block of automatic frequency control, and the indicator of the magnitude of prevalences 1.

However, the known device for measuring the predominance of binary signals has a low measurement accuracy, since the registration of the magnitude and sign of the signal is performed using a single indicator.

The purpose of the invention is to increase the point of iocTH measurement.

To do this, a device for measuring the predominance of binary signals contains a pulse edge former, the first and second outputs of which are connected to the first inputs of the first and second blocks of automatic frequency control, respectively, the second inputs of which are connected respectively to the first and second outputs of the reference signal generator, trigger, first input which is connected to the output of the first block of automatic frequency control, and the indicator of the magnitude of the prevalence, modulo two modulo are added, first the second and second indicators of the predominance sign and the integration unit; the first input of the trigger is combined with the first input of the modulo two adder, the second input of which is connected to the output of the second automatic frequency control unit and the second input of the trigger, the first and second outputs of which are connected respectively to the inputs the first and second indicators of the sign of predominance, and the output of the modulo two adder is connected to the input of the integration unit

5 and the predominance indicator input, the output of which is connected to the output of the integration unit.

FIG. 1 shows the electrical circuit diagram of the device.

Claims (1)

0 to measure the dominance of binary signals / in FIG. 2 - voltage diagrams at various points of the device circuit. A device for measuring the predominance of binary signals contains the pulse edge former 1 first 2 and second 3 blocks automatically. frequency adjustments, reference signal generator 4, trigger 5, indicator of magnitudes of predominances b, modulo two 7, first 8 and second 9 indicators of the predominance sign, integration unit 10. The device for measuring the predominance of binary signals works as follows. Each automatic frequency adjusting unit 2 and 3 generates pulses corresponding to the expected values of the leading and trailing edges of incoming binary signals, respectively. These pulses are formed by dividing the frequency of the reference signal generator 4 to the frequency of the corresponding information transfer rate with phase correction of the output signals until it coincides with the mathematical expectation of the phase of the signals at the output of the pulse edge generator 1. Phase change can be performed, for example, by adding and subtracting pulses in the input elements of the automatic frequency control blocks 2 and 3. In the absence of dominance, the edges of the binary signals (Fig. 26) coincide with the clock frequency (Fig. 2a) and the math The main waiting for the leading and trailing edges are in phase (Fig. 2c, d), as a result of which, at the output of the modulo two 7 signals are missing (Fig. 2e). If there are prevalences (Fig. 2e), the expectation of the leading and trailing edges (Fig. 2g, 3) are mutually shifted and at the output of the modulo two 7 impulses are formed (Fig. 2i), the duration of which is proportional to the shift (magnitude of dominance). Since by the time of the arrival of a positive differential signals. Mathematical waiting for the trailing edge (Fig. 2h), arriving at the second input of the trigger 5 (the first input had a positive level), the trigger 5 is triggered (Fig. 2k) and the prevalence sign indicator 9 registers the prevalence negative impulses. Pulses, generated by the modulo two 7, are fed to the inputs of the prevalence magnitude indicator 6 and to the integration unit 10. Formula of the Invention A device for measuring the dominance of binary signals containing a front driver and pulses, the first and second outputs of which are connected to the first and second outputs, respectively blocks of automatic frequency control, the second inputs of which are connected respectively to the first and second outputs of the generator of the reference signals, the trigger, the first input of which is connected to the output The first automatic frequency control unit, and the prevalence value indicator, characterized in that, in order to improve the measurement accuracy, a modulo two adder, the first and second predominance indicators and the integration unit are entered, the first trigger input being combined with the first adder input module two, the second input of which is connected to the output of the second automatic frequency control unit and to the second trigger input, the first and second outputs of which are connected respectively to the inputs of the first and second terminals ikatorov predominance sign, and the output of the adder modulo two is connected to the input of the block integration values and the input indicator predominance whose output is connected to the output integrating unit. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 614547, cl. H 04 L 11/08, 1976 (prototype). 6 r in e V to