SU599268A1 - Meter of random pulse train peak values - Google Patents

Description

The invention relates to radio measurements and can be used to measure peak values of pulses, in particular, interference pulses with undefined moments of occurrence.

Devices for digital measurement of peak values of pulse voltages are known based on the quantization of pulses in terms of level and the recalculation by the pulses of quantization thresholds J.

The closest technical solution to the invention is an amplitude analysis device, which contains a sensor connected by an output to the inputs of threshold devices, the outputs of which are connected to the sum of the reversing counters and simultaneously to the inputs of the delay elements. The outputs of the delay elements connected to the subtractive inputs of the reversible counters 21.

However, such a device cannot be used for automatic parameters of pulses of random sequences.

The purpose of the invention is to automate measurements during fluctuations of a pulse following transition.

This is achieved by the fact that, in a known peak meter, impulses of random sequences containing a sensor, a block

the threshold elements, the delay unit, and the counter are introduced, a counting pulse generator, a clock pulse generator, a first form “L pulses, and successively connecting circuits, the first of which consists of a Schmidt trigger, a second pulse conditioner RS-trigger, and the first gate unit the second one is from the second gating unit and adder, and the third one is from the third gating unit, the unit of silicatelles and the recorder,

the input of which simultaneously with the input of the third gating unit is connected to the output of the sync pulse generator connected via the first pulse generator with a lock, a block of threshold elements and a 5-input RS trigger, whose R input through the generator}

counting pulses are connected to the input of the block: delays, the output of the delay block is connected to the sync pulse generator and to the second gate. which is connected through a series-connected threshold block

elements and the first gating unit to the output of the sensor and to the input of the Schmidt trigger, Before the adder's input is connected to the output of the second gating unit, and the output of the PvD key counter to the third gating unit.

The drawing shows the structural electrical circuit of the proposed meter of peak values of the pulses of random sequences.

The pulse peak meter of random sequences contains a sensor 1 connected by an output to a trigger input

2 Schmidt and the first input of the first gating block 3, the output of which is connected to the signal input of the block 4 threshold elements. The second input of the first gating unit

3 is connected to the RS-flip-flop 5, the R-input of which is connected with the output of the second driver 6, and the S-input with the output of the first driver 7. The input of the second driver 6 is connected to the output of Schmidt trigger 2. The outputs of the block 4 threshold elements connected Сснг-. the secondary inputs of the second block 8 are gated, the outputs of which are connected to the inputs of the adder 9. The interrogation inputs of the second block

8 gates are connected to the outputs of a delay unit 10, the input of which is connected to the output of the generator P. of counting pulses connected to the output of the second driver 6. The last output of the unit 10 of delays is also connected to the input of the generator 12 clock pulses, the output of which simultaneously connects At the polling stage of the third gating unit 13, the synchronous input of the recorder 14 and the input of the first shaper 7. The output of the first forwarder 7 is connected simultaneously to the reset inputs of the block 4 threshold elements and the counter 15. Signal turn on of the counter 15 is connected to the output of the adder 9. The outputs of the counter 15 are connected to the inputs of the third gating unit 13 connected by outputs to the inputs of the block 16 of amplifiers. The outputs of the block 16 amplifiers are connected to the signal inputs of the recorder 14.

Sensor 1 is designed to form a sequence of video samples with a case. amplitudes and random instants of their occurrence. The pulses are extracted from the sequence fed to the input of the first gating unit 3 using Schmidt trigger 2, the output of which is connected via the second driver b to the R input of the RS flip-flop-5. A start pulse from the output of the first driver 7 is sent to the S input of the RS flip-flop 5. The selection pulse generated by the RS flip-flop 5 is applied to the second inlet of the first gating unit 3 and a voltage of the selected pulse is generated at its output. which affects the block of 4 threshold elements. Block 4 of threshold elements is designed to quantify the process under study at the level of w-thresholds and to represent the amplitude of each selected pulse of the sequence with a set of voltage drops at the outputs of threshold elements that are built (5 in the second pulse gating block 8 delayed in the block of 10 delays time K-1, where K takes values from O to m- 1. Gating pulses are formed at the output of the block 10 delays, when an impulse is applied to its input from the generator output 11 counting pulses s, triggered by a Schmndt trigger pulse 2 through the second driver 6. The outputs of the second gtrobing unit 7 are connected to the inputs of an adder; 9. intended for entering information from the outputs of the second gating unit 8 to the inlet flow of the counter 15, which serves to represent the amplitude of each pulse measured process in binary code n log2fn in order to reduce the redundancy code of the measured peak value, the pulse at the input of the recorder 14. Formed at the outputs of the counter 15 n-bit non-redundant code of the peak value The selected pulse is output to the recorder 14 through the third gating unit 13 and the amplifier unit 16. At the interrogation input of the third block 13, square sync pulses are received from the generator with 12 sync pulses, triggered by a delayed pulse (t - 1) t from the output of the 10 delay block. The sync pulse is simultaneously applied to the recorder 14. And the first driver 13. The second driver 7 is designed to generate reset pulses that set the triggers of the counter 15 and the RS flip-flop 5 to their original positions, after which the peak value of the next pulse of the sequence is extracted and measured. The processing time of the pulse peak meter is determined by the required measurement accuracy and dynamic range of the processes being studied, setting the number of thresholds m, as well as the speed of the recorder 14. In the case when the RS flip-flop 5 switches on the digital pulse peak meter to “O” , the first pulse of the sequence after the moment the pulse peak meter is turned on is not allocated by the first gating unit 3 and is not registered by the recorder 1 4, but through Schmidt’s trigger 2, the second driver 6, the clock generator 12, and the first driver 7 acts on the RS flip-flop 5, which generates a pulse of emission. In this case, the peak pulse meter measures and automatically records the binary code of the peak value of the pulse gated RS trigger of the 5 pulse sequence.

The proposed meter provides the ability to automatically measure the registration in the non-redundant binary code of the peak values of the pulses of random sequences and allows you to automate the measurement procedures for recording the parameters of random pulse processes, in particular, measuring and recording the statistical characteristics of the pulse interference in the information transmission channels. It can also be used for the statistical analysis of random spectra when used together with spectral analyzers. The presentation of measurement results in a non-redundant binary code allows processing the results on modern digital computers without the use of high-level programs, which makes it possible to use digital computers independently of mathematical software.