SU1622847A2 - Device for measuring pulse front fluctuations - Google Patents

Description

(61) 1385098

(21) 4498890/21

(22) 10/25/88

(46) 01.23.91. Bul H 3

(72) R.S.Tabachnik and S.N. Zasosov

(53) 621.317.33 (088.8)

(56) USSR Copyright Certificate WP 1385098, cl. G 01 R 29/02, 1988.

Basics of using magnetrons. / Ed. Yu.N. Khlopova. - I .: Soviet radio, 1977, p.1bO-1b7.

Gusev V.V., Zelichenko L.G. and others. Fundamentals of pulsed and digital technology. - M .: Soviet radio, 1975, pp.299-300, 412-413.

(DEVICE FOR MEASURING THE FLUCTUATION OF THE IMPULSE FRONT FRONT

(57) This invention relates to a radiol.

measuring equipment and can be used when testing pulsed microwave generators. The aim of the invention is to increase the reliability of measuring the number of pulses whose front fluctuations exceed a normalized value. The device contains a working 1 and clock 2 inputs, the first node 3 of the adjustable delay, the waiting reference generator 4, the logical elements BANKS 5 and 8, the generator 6 strobe pulses, the counter 7 pulses, the waiting generator 9, the driver Yu short pulses, the second node 11 adjustable delays. The device determines the relative average number of pulses whose fluctuations of the front of which exceed a given value. 2 Il.

g

Y

The invention relates to radio-measuring equipment, can be used in testing pulsed microwave generators, and is an improvement of a known device according to ed. V 1385098.

The purpose of the invention is to increase the reliability of measuring the number of pulses whose front fluctuations exceed the normalized value.

FIG. L is a block diagram of the device; 2, waveforms explaining the operation of the device.

A device for measuring fluctuations of the pulse front contains a worker 1 and a clock 2 inputs, the first node 3 of an adjustable delay, the waiting reference generator M, the first logical element BAN 5, the generator 6 of strobe pulses, the counter 7 pulses, the second generator 9. In this case, the standby generator 9 comprises serially connected shaper 10 short pulses and the second node 11 of an adjustable delay. The input of the first node 3 of the adjustable delay is connected to the clock input 2 of the device, and the output is connected via a series-connected waiting generator, the first logical element BAN 5 and the strobe pulse generator 6 to the input of the pulse counter 7. The waiting generator 9 is connected to the output of the first node 3 of the adjustable delay, and the output through the second logical element BAN 8 to the input of the strobe-pulse generator 6. The inputs of the first and second logic elements 5 and 8 BANKS are connected to the working input 1.

A device for measuring fluctuations of the pulse front operates as follows.

The measured pulses with a fluctuating front are applied to the working input 1 of the device and are simultaneously fed to the enabling input of the first 5 and the inhibiting input of the second 8 logical BAN elements. The clock pulses applied to the clock input 2 of the device pass through the first node 3 of the adjustable delay and the front is triggered by the waiting reference oscillator L of the rectangular pulses and the waiting generator 9. The reference pulses from the output of the waiting reference oscillator U sub0

five

0

five

0

five

0

five

0

five

yy.ch to prohibit the input of the first logical element BANE 5.

In this case, the reference pulses block the passage through the logical element BANGE 5 of all measured pulses, the front of which is late relative to the front of the reference pulses. For part of the measured pulses, the front of which is ahead of the front of the reference pulses, the logical signal BREAD 5 passes the signal during the time from the beginning of the front of the fluctuating pulse to the moment corresponding to the level at the front of the reference pulse, at which the passage of the measured pulses occurs.

From the output of the standby generator 9, short pulses generated by the shaper 10 and delayed by a second node 11 of an adjustable delay by a specified amount relative to the front of the reference pulses are fed to the enabling input of the second logical element BAN 8. The shaper 10 short pulses generate 1 pulses that are shorter than the minimum duration of measured pulses. Work pulses block the passage through the logical element BANGE 8 of all pulses from the output of the standby generator 9, the front of which is late relative to the fluctuating front. For the part of the measured pulses arriving at the prohibiting input of the BAN 8 logical element, the front of which is ahead of the front of short pulses at the enable input, the signal of the BAN 8 prevents the signal from the beginning of the front of the short pulse to the moment corresponding to the front of the measured pulse in which complete blocking of the passage of short pulses of the channel of the clock input 2 of the device occurs.

For any fixed delay determined by the first node 3 of the adjustable delay, only the signals whose front is located outside the time window defined by the delay value of the second node 11 of the adjustable delay pass to the input of the strobe pulse generator 6 from the outputs of the logical elements BANKS 5 and 8. Pulse counter 7 counts pulses, fluctuating

The leading front of which is outside the specified time window 0 "/ | . The magnitude of the delay of the first node 3 of the adjustable delay at a predetermined fixed delay of the second node 11 of the adjustable delay achieves minimum readings of the counter 7 pulses. This corresponds to the optimal location of the time window on the fluctuation field, i.e. the position of the maximum density of the fluctuating front of the measured pulses. According to the counter readings obtained over a certain period of time, referred to the specified interval and the frequency of the parcels, the relative average number of pulses, the front fluctuations of which exceed a predetermined value, is determined.

ten

20

invention formula

A device for measuring fluctuations of the pulse front by aut. St. No. 1385098, characterized in that, in order to increase the reliability of measuring the number of pulses whose front fluctuation exceeds a normalized value, it contains a second BAN element and a standby generator containing a series of short pulses connected in series and a second adjustable delay node, while the standby generator input is connected with the input of the waiting reference generator, and the output - with the permissive input of the second element BANGE, prohibiting the input of which is connected to the working input of the device, and the output is connected input strobe pulse generator.

15

Claims (1)

Claim A device for measuring fluctuations of the pulse front according to ed. St. No. 1385098, characterized in that, in order to increase the reliability of measuring the number of pulses, the fluctuation of the front of which exceeds the normalized value, it contains a second element BAN and a standby generator containing serially connected shaper of short pulses and a second node of adjustable delay, while the input of the standby generator is connected with the input of the standby reference generator, and the output with the enabling input of the second BAN element, the prohibiting input of which is connected to the working input of the device, and the output is connected to the strobe generator. Ραδ. imp Imp. by permission Ft. 8) Imp. to ban, (dh. 5) V / x. imp (In.b)