SU900206A1 - Device for measuring random process outburst duration probability distribution - Google Patents

Description

(54) DEVICE FOR MEASUREMENT OF DISTRIBUTION OF PROBABILITIES OF EMISSIONS OF RANDOM PROCESSES

one

This invention relates to radio measurements.

A device for measuring parameters of random processes is known. containing a matching logic, measuring circuit, trigger, memory, display unit, return circuit, delay circuit U1.

However, this device does not allow accurate measurements of the probability distribution.

The closest to the proposed technical essence and the achieved result is a device containing an input stage, the input of which is connected to the input bus, a series-connected pulse width-pulse converter, a digital discriminator and a counter, a second counter, the input of which is connected to the converter duration input- the number of 1ShS21.

pulses

The disadvantage of this device is the insufficient frequency range and accuracy.

The purpose of the invention is to expand the frequency range and higher {less accuracy.

The goal is achieved by the fact that in a device for measuring the distribution of probabilities of the durations of emissions of random processes, containing an input stage, the input of which is connected to the input bus, a series-connected converter duration-number of pulses, a digital discriminator, and a counter with the input of the converter the duration-number of pulses, introduced the switch, the pulse generator sample

30 and a series-connected time scale converter and interval generator, with one input of the scale converter

time is connected to the output of the sampling pulse generator and the second input of the interval imager, two outputs of which are connected via a switch to the input of the converter duration-number of pulses.

FIG. 1 shows the structural electrical circuit of the proposed device; in fig. 2 is a block diagram of an interval generator.

The device contains an input stage 1, a time scale converter 2, a sampling pulse generator 3, a shaper 4 intervals, a counter 5, a converter 6 duration-number of pulses, a digital discriminator 7, a counter 8 and a switch 9. The input signal is fed to the input bus 10.

The shaper has 4 intervals (Fig. 2 contains a controlled one-shot II, time selectors 12 and 13, an inverter 14, a delay element 15, triggers 16-18.

The device works as follows.

The implementation of the random process x (t) enters through the input stage 1 to the time scale converter 2. This block is made on a storage electron-storage tube and is intended for changing the time scale of the realization recorded on the target of the tube (not shown).

Changing the time scale is as follows. Real-time implementation is recorded on the target by a recording beam. After the end of the recording, the reading is performed with a special reading beam. The movement of the reading beam occurs periodically in the direction perpendicular to the direction of the recording beam. The movement of the reading beam starts always from the same level.

At the same time, a trigger (not shown) is triggered, returning to its initial state by an impulse that occurs when the reading beam crosses the potential topography of the target at the recording location. As a result, the trigger generates shirted-modulated pulses (PWM pulses), the durations of which correspond to instantaneous values of realization at the points of reference. The bend of these pulses reproduces the recorded implementation. Since the speed of the reading beam is different than the speed of the recording, then the PWM pulses will represent the implementation of the process in a modified time scale.

The operation of the time scale converter 2 occurs cyclically. The beginning of the cycle is set by the pulse of the generator 3. After this, a write-read occurs and at the output of the transducer 2 a series of PWM pulses appear.

A series of pulses is fed to the input of the Former 4 intervals, where the formation of the duration of the emissions T and the intervals between them O-. To another input of the imaging unit 4, pulses are received from the generator of 3 pulses of samples.

Controlled one-shot trigger 11 simultaneously with pulses

11IM produces a pulse. The duration of which is bi-controlled by control voltage and this duration also determines the level of selection, the excess of which by the implementation determines emissions PWM pulses and one-shot pulses act on time selectors 12 and 3, and one-shot pulses go through time selector 12; Inverter 14. In this case, the trigger 16 generates pulses, the duration of which correspond to the duration of the emission of the realization above the threshold

level u. Since the entire implementation recorded on the handset has several bursts, a further part of the circuit, including the delay element 15 (the delay occurs for the reading period)) triggers 17 and 18, select one of these bursts. The duration of this surge T is examined in the rest of the circuit (pulses from the first terminal of the switch). From the second terminal, corresponding to the second shoulder of the trigger 18, pulses are removed, the duration of which determines the intervals -6-. The operation of the rest of the circuit, including the interval-number converter, the digital discriminator and the counters, has no differences from the operation of the known device.

Claims (2)

1. For Japan No. 48-35028, cl. 110 D 15, 10.25.73. 2. USSR author's certificate  171479, cl. G 01 R 23/10, 12.03.64