SU596956A1 - Time interval distribution function digital analyzer - Google Patents

Description

(54) DIGITAL ANALYZER OF TIME-INTERVAL DISTRIBUTION FUNCTIONS

switching; the first output of which is connected to the first inputs of the storage units of the reference distribution function, the second inputs of which are the second input of the analyzer, the output of the first storage unit of the reference distribution function is connected to the nerve inputs of the distribution comparison unit and the inequality unit, the second input of which is connected to the output of the second reference storage unit distribution function, while the second input of the distribution comparison unit is connected to the second output of the switching unit, and the third input is connected to the output a generator.

The drawing shows a structural electrical circuit of a digital time interval distribution analyzer.

The digital analyzer contains a reference oscillator 1 and a quantization unit with amplitude and time 2 whose outputs are connected to a counter, which measures the durations of intervals 3. Counter 3 is connected to the input of discriminator 4, which has as many outputs as to how many zones the possible meaningful measured and E1 intervals are divided. Each output of the discriminator 4 is connected to the corresponding channel of the interval averagers block 5. The output of the counter 3 is also connected there. The block of averagers of the intervals 5 is connected to the information input of the mode switching unit 6. The mode switching block 6 has two states: "calculation and" information update.

In the state "computation, the output of the averaging unit 5 is connected to the first input of the comparison distribution unit 7, and in the state" updating information, to the storage units of the reference distribution function 8 and 9.

The storage unit of the reference distribution function 8 has euie one input for recording the reference distribution function from an external source, and its output is connected to the second input of the distribution distribution comparison unit 7 and to the first input of the inequality determination unit 10. The inequality detection unit 10 has a second input, the block 9 is connected to, and the output connected to the control input of the switching unit 6 to the inputs of the installation of the initial state of the counter 3 and the averagers block 5. The distribution comparison unit 7 has a clock input, CONNECTIONS to the output of the reference oscillator 1.

The principle of operation of the analyzer is as follows.

The analyzed signal is fed to the input of the quantization unit 2, at the output of which signals are generated about the intersection of the selected quantization level by the analyzed signal. The signals on the intersection of the quantization level are received as controlling the input of the counter 3, alternately permitting or prohibiting the passage to the second input of the counter of the pulses of the reference generator 1 following the specified quantization frequency. The number of pulses that feed the counter 3. Between two control signals and fixed

at its output, the proportions; 1no the duration of the corresponding time interval.

Information) 1 about the duration of the next measured interval from the output of the counter 3 is fed to the discriminator 4, which determines which zone of the duration iio the measured inlv.l. and connects the corresponding channel block averagers intervals 5 to the output of the counter 3.

The averaging block 5 contains as many channels as the zones are divided into all possible values of the duration of the measured intervals. Each channel has a self-sustaining averager, at the output of which, after repeated repetitions of the operations described above, a value is formed that is proportional to the frequency of the measured intervals in the corresponding duration zone.

The combination of these values over all channels on the output of the block of averagers 5 determines the distribution function of the measured intervals.

If the switching unit 6 is in the state "computation, then the distribution function through the block 6 enters the comparison distribution block 7. The second input of the block 7 receives the reference distribution function from block 8.

In block 7, a comparison is made about the comparison of two distribution functions arriving at it and calculating the probability that the compared distribution functions correspond to the same distribution law. The calculation is performed according to one of the known criteria of consent, for example, X-square or Kolmogorov. At the same time, the operation of the distribution comparison unit 7 on the synchronization input connected to the reference generator 1 is synchronized with the operation of the remaining analyzer units, which allows to perform calculations on the selected criterion according to the selected criterion simultaneously with the definition of the distribution function by other analyzer units, t. s. without increasing the total time of the random process analysis.

The reference distribution function can be written to the memory unit 8 from an external source at a special input. In addition, the distribution function obtained at the output of the block of averagers 5 at some time chosen by the operator can be used as a reference. For this, the mode switching unit 6 is set to the "update information" state and connects the output of the averaging unit 5 to the input of the unit

8 storing the reference distribution function 8.

The reference distribution function is additionally supplied to block 9. The outputs of blocks 8 and

9 are monitored for equivalence by block 10.

If in the signals stored in blocks 8 and 9 there is an unevenness, then at the output of block 0 a signal is generated that a hardware malfunction occurred.

According to this signal, the counter 3 and the block of averagers of the intervals 5 are automatically set by the operator or to the initial position and