SU1430924A1 - Seismic station - Google Patents

Abstract

The invention relates to seismic exploration and can be used to receive and record seismic signals. The purpose of the invention is to increase the reliability of signal registration and reduce the amount of recorded information due to an instantaneous change of the channel parameters during the registration process and a change in the polling frequency depending on the spectrum of signals. The invention implements a seismic station as a flexible amplifying-transforming system, which allows instantly changing filtering parameters and amplifying channels with wide variation in the sampling frequency. These properties make it possible to use a single seismic station for exploring horizons with different depths in the Egani area. In addition, a seismic station allows for adaptive filtering of waves and provides more accurate recording of seismic field parameters while simultaneously reducing by 2-3 times the amount of information recorded in the digital form. To do this, each channel contains two integrators, two analog memory devices and a totalizing amplifier, and a spectrum generator is connected between the output of the analog-digital converter and the inputs of the recording systems. The spectrum generator contains the summing cells included in the appropriate way, switches, memory registers, arithmetic devices. The filtering and gain parameters are set by the control unit, which contains the registers connected in an appropriate way, the controllable counters, the drivers, the code of the RF code, or the code LF code and gain code encoder. From the output of the control device, the filter and gain parameter codes (RF code, low code, gain code) control the operation of the spectrum generator and register devices ii. 2 hp f-ly, 6 silt ,, 2 tab. Stock (L 4 00 § IS

Description

The invention relates to seismic exploration and can be used to receive and record seismic signals.

The purpose of the invention is to increase the reliability of signal registration and decrease the amount of recorded information due to the instantaneous change of the channel parameters in the process of recording and changing the polling frequency depending on the spectrum of signals.

FIG. 1 shows the seismic station in FIG. 2 - control device; in fig. 3 - spectrum shaper; in fig. 4 - the essence of the filtering process due to signal transformations performed in the seismic station; on . FIG. 5 and 6 - the essence of the formation of the spectrum due to signal transformations carried out in the seismic station.

The station contains seismic receivers 1.1-1.P channels, channel amplifiers 2.1-2.p, two-position switches 3.1-3.p; first 4.1.1-4.p.1 and second 4.1.2-4.p.2 channel integrators, keys 5.1.1-5.p.2, devices 6.1.1-6.p.2 analog memory, 7.1-7.P summing amplifiers, switch 8 channels, MARU 9 amplifier, analog-to-digital converter (ADC 10, a spectrum generator 11, a control device 12, a start input 13, a building moment input 14, synchronizer outputs 15-19, a registration parameter code output 20, a start output 21, a subinterval duration code input 22 la, input 23 of subinterval number code, inverter 24, digital registration device 25, analog registration device 26, time stamp generator 27, shaft subinterface length register 28, subinterval number code register 29, subinterval number code 29, launch driver 30, sync generation logic 31, controllable counters 32 and 33, an RF code encoder 34, an RF code encoder 35, a gain code encoder 36, a switch 37, a chain of summing cells 38.1-38. Paired switch 39, a cell 40, combining the samples of the second chain of summing cells. n, a chain of registers 42.1-42. memory, an arithmetic unit 43, an adder 44, and an arithmetic unit 45.

The seismic station works in the following way.

At outputs 15-18, after turning on, clock signals are constantly generated. The integrators 4 in each channel work alternately: when one is connected to the output of amplifier 2 and conducts integration, the other is disconnected and its capacitor is discharged. Before the end of the integration interval, switch 5 is closed and the corresponding analog memory device 6 is charged up to the output signal of the integrator 4. V the end of the integration interval key 5 is opened. With open keys 5, one 6.1.1 analog memory device stores the integration result at an odd interval, the second 6.1.2 — for even — the memorized signals form, with an accuracy of up to a constant multiplier, depending on the transfer coefficient, a series of average values from the input signal for tight intervals.

The conversion of a signal into a sequence of averages, carried out in a seismic station, provides the following quantization and filtering characteristics.

If the signal has, for example, the form shown in FIG. 4a, and the interval t selected, defining the time scale, the area of each figure formed perpendicularly from the interval borders, the axis t and the segment f (t) on the interval equal to a certain interval from f (t) over the interval. We transform each figure into a rectangle of the same area, replacing the segment f (t) on the interval with a segment straight, parallel to the axis t. Each straight line segment has at least one common point with the replaced f (t) segment inside the interval. The ordinate of the common point is equal to the average of f (t) over the interval

L –F f)

If it is necessary to estimate f (t) by one sample for each interval, the highest probability of the estimate and the minimum of the mean square error is provided if the ordinate of the sample is equal to the average f (t), which takes all the signs of K + t

chen, on the interval f

  1 i (N-t ..

3

For ω1, their l (t) l (t) spectra pa are:

00

l (t) - sincjtdt about

 .-TG / l SCHZ

sin (.

 k-0

00

l (t) (cosotdt

7 C I

.

sinco / 2,

,

where O is the frequency;

t is the time interval; k is the sequence number of the interval,

, 1,200;

tK kf +

+ - coordinate of the middle of the interval.

Each member of the sum in formulas (1) and (2) can be considered as a point on a plane with coordinates 1.k (lk; them) y2j (H, 1a.k) (D

cosutdt Pli t-Ul L. (

  Chi sincotdtj - (

kTi

numerical values of the means defining the corresponding ordinates). Taking into account the coordinate on t, the terms of the sum in formulas (1) and (2) form a sequence of instantaneous samples of the coupling / suppression spectrum at the moments of the midpoints of the intervals. And the sequence of instant samples up to a constant multiplier with amplitude

sinL3 / 2

-: -; c-f ,, forms in sum a quantized representation of the spectral component. If the signal can be decomposed into the sum of any number of components of the form sincdt and coswt, transform - Kt +

f | - f (t) dt should give

point with coordinates f ,, (t. ,, f.,), where

KtvC

H f (t) dt - the numerical value of the average). Since the transformation of each component into an average gives a point with the abscissa t t, an average of the sum, equal to the sum of the averages, must also be on the t t line, perpendicular, recovered from the middle of the interval. Regardless of whether the signal being converted is stationary or not, it can be decomposed into the sum of two signals:

 30924

the left is some signal, the Fourier transform, this signal is expressed by a sequence of samples in

from the midpoints of intervals equal to the average value of the signal to be converted at intervals; the second - the addition of the first, the average value of the second signal for each interval is equal to lu. For the transform function

the sequence of mean values is shown in FIG. 46. A line connecting the sequence of averages in FIG. 46 (triangular IMt5 pulse) is a reaction of an ideal low-pass filter with a linear phase response to a 5-function, and a broken line connecting the sequence of averages in FIG.

20 4a, as the sum of triangular pulses - the form f (t) is ideally limited in frequency.

The higher frequency of the spectrum of the sequence of mean values

25 is found as follows. In the Fourier interval

sous

thirty

f (t) -i-j dwJf (x) cosQ (x-t) dx (3)

the intrinsic integral is an analytical expression of the spectrum component. The dp component of the spectrum is replaced by the expansion on the infinite interval by the sum of the expansions on successive tight intervals. Applying the average theorem, valid for small values of ω and C, we integrate

kcvT

l (t) j f (x) cosw (x-t) dt f (x) ktt-TK -oo

xcosQ (x-t) dt 1 cosc3 (x-t) dx - ™ f7i KCosu; a, -t), (4)

UlI -

where c is the interval defined by the di time scale; 5Qk is the interval sequence number,

ksg- .., -2, -1,0,1, 2, ..., 00

 -kV vt

f (t) dt is the average value of f (t) on the in-th interval of k D, kC + С kC.

We substitute the resulting expression for the spectral component into the Fourier integral and investigate the limit

with

KGL S5O / -i7 f-

f (t)

.f-: i, Jw - / 2

dcO.

(five)

In the formula (5) t kcr + (kOp 0. Average value

ordinate of the middle of the interval) is included

under the sign of the integral of 6E as a constant-in 1,

  r (t) dt and a certain integral

t, and t - as a parameter. Putting down. t. J

, - / h l lt

we obtain the quantized form f (t) as a sequence of instantaneous values in the cross sections x.,. .

 f (t) dt differ by constant

kr1

multiplier --- which can be

Since cosco (tn-t) has

eat

WITH

sincat / 2

taken into account in the channel gain. Integrators 4 and analog storage devices 6 perform two tasks.

lim -5: 79 k ideal low pass filtering

   about v. J, linear phase response and

Г sinQ,

J - „- dQ, (6)

quantization. This ensures a minimum of the mean square error of each sample and a more economical presentation of information than in the Kotelnikov readout theorem. From iZ

foot sinus

25

therefore) C / 2 779-;

. L ((

quantization is the minimum of the average of each representation you are counting

V G9 b

f, z: f

to

The resulting formula leads to the same result as the integration of the sine wave and cosine waves of the formulas (1) and (2). For a signal that can be represented by a Fourier integral, the transformation to the mean gives a point with coordinates). The sum on the right side of the formula is a sequence, the members of which together form a time-quantized representation of the signal. In addition, the conversion to the average has one more property: sinQ / fl - the alternation of samples; Vg - the highest frequency of the 30 spectrum). Ideal low frequency filtering with a linear phase characteristic makes it possible to optimally suppress high-frequency noise and specular hours of 2 tons with minimal distortion. The signal conversion into a sequence of partial average or partial sums is carried out by summing amplifiers 7 and summing cells 38 by equalizing the distribution of the dispersion and signal energy in n frequencies. In a seismic station, the output signals of analog channel memory devices, such as 6.1 and 6.2, are fed to the input of a summing amplifier.

on decreasing function, and integral--,

AC 7t whose outputs are connected to the sine, the sine tends to its limit to

 oscillatingly, reaching it for the first time at, 9; FIG. 4c. Therefore ", ..

 sin (7, I sinn, f sinQ, J - ™ dfl- J -jj-dn

OOP with ,, E

The corresponding inputs of the switch are 8 channels. When the keys 5 are open, the signal at the outputs of summing amplifiers 7 is constant and equals, with an accuracy of gQ, to a constant coefficient, the average of the integration results for an odd and even interval, i.e. Partly average by 2. At intervals, when the keys 5 are open, the switch has 8 channels. connects the outputs of the summing amplifiers in series to the input of the amplifier 9 of the MAR and performs the analog-to-digital conversion. The registration cycle begins upon arrival. -I- + 4ll "dJl, / 2. , J-. Si

Lt

The last equality is possible, esf sinn :. J J Oh, therefore, with glory04, H

inside the change intervals

14309246

the signal in FIG. 4a and the shaded part of the area in FIG. 4c is the sum of the spectral components Q. (1.9; Xue J.

5 And the average is -; c- I f (t) dt is equal to the sum J c-g of the instantaneous values of the components

spectrum in section t t ,, for frequencies

 . Average value

n-in 1,

l lt

 f (t) dt differ by constant

kr1

multiplier --- which can be

taken into account in the channel gain. Integrators 4 and analog memory devices 6 perform two tasks.

five

G) C / 2 779;

 L ((

quantization. This ensures a minimum of the mean square error of each sample and a more economical presentation of information than in the Kotelnikov readout theorem. From iZ

 IT - ".1.9 we have.

Vfl

V G9 about b --- - hour-.

tota counts; Vg - higher frequency 0 of the spectrum). Ideal low frequency filtering with a linear phase response makes it possible to optimally suppress high-frequency interferences and specular frequencies with minimal distortion. The signal is converted into a sequence of partial average or partial sums by summing amplifiers 7 and summing cells 38 by equalizing the distribution of the dispersion and signal energy over frequencies. In a seismic station, the output signals of analog channel memory devices, such as 6.1 and 6.2, are fed to the input of a summing amplifier.

-,

7t whose outputs are connected to

The corresponding inputs of the switch are 8 channels. When the keys 5 are open, the signal at the outputs of summing amplifiers 7 is constant and equal to the constant coefficient to the average of the integration results for an odd and even interval, i.e. To a partial average on 2. For intervals when keys 5 are open, the switchboard of 8 channels. connects the outputs of the summing amplifiers in series to the input of the MAR 9 amplifier and performs analog-to-digital conversion. The registration cycle begins after

Neither the active level of the input 13 trigger. The signal at the control output 21 triggers the excitation source, digital and analog recording devices 25 and 26. The signal from the geophone, located near the excitation source, is fed to the input 14 of the excitation moment. The generated clock signal from output 19 triggers amplifier 9 of MARA and A1D1 10. The samples from the output of ADC 10 are fed to the input of the former 11 of the spectrum. The first sample at the output of the spectrum generator 11 determines the excitation moment for the digital and analog recording devices 25 and 26, and thus the delay associated with signal processing by the spectrum generator 11 is taken into account. The chain of summing cells 38.1-38.P increases the order of the sequence of partial sums in such a way that at the output of the first cell 38.1 the channel count is equal to the sum of several samples of the same channel with a shift by one count, for example, the first is the sum of the first, second and third , the second sum of the second, third and fourth, the third - the sum of the third, fourth and fifth, etc., at the output of the second sum of the transmitting cell 38.2 the channel count is equal to the sum of several samples of the same channel received at the input, for example, the first, second third and fourth

xf + t

(k + njT

00

.0

li, 1 f (x) costo (x-t) dx-t- ... -f f (x) coso (x-t) dx

  V & .iiiii-ui

W “

l (t) Z.

(k + nl l (n) tr

cto f (x) cos (0 (x-t) dx o2-- 1 - f (ii) dx-j cos (o (x-t) dx

 y y

 . n

(K4-) tr () v () t

0 ° - (- Д- L f (x) dx + ... + - i f (x) dx- f cosco (x-t) dx

 2 JUit. (Btrillb,

.b-l.

Togo; second, third, fourth and pth and so on The signal from the output of one of the summers {their cells through the capacitor 37 enters the input of the cell 40, which combines the samples.

Converting a signal into a sequence of partial averages or partial sums changes its spectrum as follows.

Formula (4) allows to obtain the expression for the spectral component

5 0 5

0

five

(V

l (t) / f (x) cosW (x-t) dx

.

navel

Xt + t

00

...

K - 00

11 - WITH

 TO

(7)

where 1 j f (x) cos (x-t) dx;

.Ik ..jj

n

1 i

TO

n

n. + 1k4.1 +. . . + lk

 -

Sh

"Itlri

.w ,. to

, E. .

partial average; second order partial average; . partial medium, higher order

From formula (7), an expression for the spectral component can be obtained, valid for small ω and C:

(k + njT

.0

 f

.b-l.

00 - “n. , „

% S).

n

. „F, + fi + ... +,

- "" t T.l; .. v ((4П- (

where f

l

partial average.

t P & / 2.

Putting in the formula (8) sinci5 i / 2 P., sinco t / 2 and, using the formula (7),

(eight)

using the same transformations as in the derivation of formula (8), 55 it is possible to obtain another expression for the low-frequency component of the spectrum, valid for small values of &)

oo (t) 2: Kt-OQ 00 H. "

1L +1 +, + HL Kk + k + rn-t

m

sin m (P

 -, ". M -o -X 1„

.f ™ sh7 72-T- ° (

-with

50

 n, tn

. :: „.....;.

T-Ift IL. "

Integrating the CO, we obtain the expression for the low-frequency part of the spectrum f (t)

.. WITH

f (r) - f. - - t siiiw5 / 2

, ir.n.m, ..., l.g J

P,

s1p1 (Og / 2 cosOCt

, - ----- i-UOUJV U e

sin (} f / 2,

. п, „.., е.

. "N, m ,.

Putting in the formula (10) t

cW

We obtain f (t) in a time-quantized form:

, Ch11, t, .. ,, г. «1

sin (oC / 2

P

n, m,.,. Ate

, 1.P1 ...

) ,, ™ ez

 - / 1seu f i. "N.m .... c, h

ni 2 ± Z2T-4- ---- (11)

.ni, ..., lg

 sinitat / 2

sincu

If n, m, ..., l, g are the numbers of the natural row, formula (11) can be transformed into the form:

43092A

 - h

(g) f (Ki

SI

sinio

a

dQ

10 sinO

a

about

  71

4v

K-03K

P

(12)

where fl "T / 2 - 1G - | G0,

V.Ul

35

the components belonging to the sections

H and

  t, occurs with

40

45

50

55

taking into account the mark. Therefore, the frequencies of € 9, 6 are not contributing to the partial amount of 2 counts; "0.4j (fig. 56), frequencies do not contribute to the partial amount of 3. BeG 0.28, 0.4 (Fig. 5c), and so on. (fig. 5d), And the partial average of 2 is, in turn, the sum of the instantaneous values of the spectral components during t for GeCo 0.4 (fig. 56), the partial second order of 2 and 3 is The sum of instantaneous values is4-2.

tants in section t t for 06 o; 0.28 (fig. 5c) and t, d, (fig. 5g-i). As can be seen from fig. 5, the increase in the order of the partial average results in the fact that the distribution of the spectral density and energy over the frequencies practically coincide and are close to uniform, and the spectrum and signal energy are all

narrower frequency band. Values

e.

1 / bc y-, corresponding to the shim frequencies for partial averages

in FIG. 5, summarized in table. Figure 1 shows how the ratio of the sample frequency to the highest frequency of the spectrum increases with, increasing the order of the partial average sequence (due to a decrease in Vg).

But the attitude --- can be changed for

relationship --- you can change

at

counting down counts, and depending on the tasks to be performed, provide either more economical packaging of information or a more accurate representation of the time interval. The analysis shows that the minimum of the ratio of the modified sample rate to the highest frequency of the spectrum can be obtained if the last stage of the formation of the partial average of g samples is carried out with a shift of the beginning of each subsequent sample by g. With such a partial average generation algorithm, the frequency of counts of the recorded signal is reduced by a factor of g. The values of the ratio of the altered sampling frequency and the higher frequency of the spectrum, obtained as a result of spectrum generation according to FIG. 5, are given in table. 2. The change in the 8 function when converting it into a sequence of partial sums is shown in FIG. 6. As can be seen from FIG. 6, the result of the conversion is the transition of the S -function into a triangular pulse and further into a signal close to a bell-shaped pulse with a simultaneous increase in the level. With a sufficient order of partial sums, their sequence extrapolates the original signal as a sequence of quantized bell-shaped pulses.

In the seismic station, the registration interval is divided into subintervals. The subinterval duration code is received at input 22 from the control computer.

or a set of switches and a Q channel count is added to the output of the adder 44

to the register 28. In the register 29 through the input 23 the code of the number of subintervals is entered. The volume of the counter 32 is determined by the number in the register 28, and the volume of the counter 33 by the number in the register 29. After acting on the input of the signal of the excitation torque to the input of the controlled counter 32, logic signal 31 receives a clock signal and pulses

55

equal to the sum of the instantaneous values of the spectrum components belonging to the frequency interval cOg; j. The control code of the switch 39 and the arithmetic unit 43 is received from the low-code encoder 35 via the output 20 of the registration parameters code. Thus, for each subinterval, the lower frequency of the spectrum of the overflow register of the controlled counter 32 is received at the input of the controlled counter 33, and its code determines the subinterval number. In accordance with the number of the subinterval, the simulator 34 sets a higher frequency code, which from the output 20 of the registration parameters code is fed to the input of the controller 37 and to the control input of the cell 40 combining the samples. Thus, the order of the partial average and the number of samples to be combined, i.e. higher spectral frequency and sample rate for each subinterval. From the output of cell 40, which combines the readings, the signal is fed to the input of the chain of summing 1 cells 41 and to the input of the chain of registers 42 of the network. The chain of sum cells 41 increases the order of the partial average. A chain of memory registers stores a number of the last samples of each channel. The switch 39 is controlled in such a way that the inputs of the adder 44 simultaneously receive samples of the same channel corresponding to the same point in time: to one input there is a count from the output of one of the

memory registers, which is a partial sum, the order of which is determined by the state of the switch 37, to the second input of the adder through the arithmetic unit 43 from the corresponding summing cell 41 count, which is a partial sum of a higher order. The count from memory register 42 is equal to the sum of the instantaneous values of the spectrum components belonging to the frequency interval 0, С0в, 3 The counting from the output of the summing cell 41 is equal to the sum of the instantaneous values of the spectrum components belonging to the frequency interval GO, and) E.,,, multiplied

at a constant coefficient. And

CO with c. The arithmetic unit 43 divides by a constant coefficient, and the adder 44 subtracts the incoming samples. As a result, each

five

equal to the sum of the instantaneous values of the spectrum components belonging to the frequency interval cOg; j. The control code of the switch 39 and the arithmetic unit 43 is received from the low-code encoder 35 via the output 20 of the registration parameters code. Thus, for each subinterval, the lowest frequency of the detected signal is set. From the output of the adder 44, the signal is fed to the input of the arithmetic unit 45, which divides the signal by the number determined by the gain code. The gain code is fed to the control 11111 input of the arithmetic unit 45 through the output 20 of the registration parameter code from the output of the gain code encoder 36 and thus the connected channels switch, MARA amplifier, analog-to-digital converter, digital and analog recording devices, and control device J including

15 drivers, a logic circuit for generating sync signals and controlled counters, characterized in that, in order to increase the reliability of signal registration and reduce 20 the amount of recorded information when operating in a wide range of depths due to instantaneous change of channel parameters during registration and change of survey frequency Depending on the spectrum of signals, each channel contains two integrators with bit switches, two analog memory devices, and a summing amplifier, the integrator inputs

30, through a two-way switch, is connected to the output of the channel amplifier, and the output of each integrator, via a switch, is connected to the input of the corresponding analog paddle device of each subinterval, the threshold of the seismic station is set. The overflow impulse of the controlled counter 33 enters the sync signaling logic 31 and the start-up shaper 30. Under its influence, the flow of the sync-signals to the input of the controlled counter 31 and to the output 19 is stopped. The active level at the start output 21 is removed and the registration cycle ends.

The main advantage of a seismic station is to increase the reliability of research due to the following factors. The applied time quantization, when each sample represents the average value of the signal in the middle of the interval, provides the maximum accuracy of the estimate of each sample, and therefore the maximum accuracy of the total recorded in the quantized waveform. There is no transient in the seismic channel distorting the recorded signal. Eliminating information redundancy by shaping the spectrum ensures independence from the excitation conditions. Whatever the distribution of the energy of a source-excited signal in the recorded frequency band, the signal processing algorithm in

2g ports, the outputs of the analog memory devices are connected to the inputs of a summing amplifier, the output of which is connected to the corresponding input of the channel switch, and between the output of the analog-digital converter and the inputs of the recording systems a spectrum driver is connected, the control input of which is connected to the output of the registration parameters code of the device The upstream station reduces the result of the registration to the case, as if the signal were excited with a uniform distribution of energy over the frequencies, and the medium would interact with all the components the spectrum of the detected frequency band is the same as with the average frequency.

The seismic station provides a significant reduction in the number of recorded and processed information due to a more economical digital presentation of information and the possibility of changing the sample rate during the recording cycle in accordance with the changing spectrum. In addition, the processing eliminates

the need for deconvolution and reverse filtering.

Claims (1)

Invention Formula 1. A seismic station containing seismic receivers by the number of channels, channel amplifiers, channel integrators, ambassadors. 2g ports, the outputs of the analog memory devices are connected to the inputs of a summing amplifier, the output of which is connected to the corresponding input of the channel switch, and between the output of the analog-digital converter and the inputs of the recording systems a spectrum driver is connected, the control input of which is connected to the output of the registration parameters code of the device up45 2, the Seismic Station according to claim 1, wherein the shaper of the spectrum generator contains a chain of at least two 5Q included summing cells, a switch and a cell combining counts, a chain of at least two serially-connected memory registers, a second chain of at least two aftergroup-related summing cells, a paired switch, an arithmetic unit, an adder, and a second arithmetic unit; the input is the first of the series connected. ;. The summing cells are connected to the output of the analog-digital converter, and the outputs of the last ones from the chain of pyroupix cells are connected to the inputs of the switch, the output of which is connected to the input of the combining samples of the cell, the control input of which is connected to the input of the switch of the control device, and output with parallel-connected inputs of the chain of memory registers and the second chain of sequentially-connected summing cells, outputs of the chain of memory registers and outputs of the second chain of sum the cells are connected to the corresponding inputs of the paired switch, one output of which is connected to one input of the adder, and the second output through an arithmetic device to the second input of the adder, the output of the adder is connected to the input of the second arithmetic device, the output of which is connected to the inputs of the registration devices, and the control input a paired switch connected to the control input of the first arithmetic unit and code output The registration parameters of the control gain device, whose bit outputs are equal, the control input of the second is connected to the output of the parameter code of the arithmetic unit as well as the registration of the control unit.   b l and c a 1 iiLZIIIZrEIilliHJjiErEIEilli: sixteen five dinene with the output of the control device registration parameter code. 3. The seismic station of claim 1, wherein the control device uses a subinterval duration register, a subinterval number register, two controllable counters, a high frequency code coder, a low frequency code coder, and a gain code coder, and controllable counters are connected in series, the input of the first is connected to the logic circuit of the formation of clock signals, the output of the second is connected to the logic circuit of the formation of clock signals and the driver of the start of the excitation source and recording devices, i The control of the first counter is connected to the outputs of the bits of the register of the code of the duration under the slots, the control input of the second counter is connected to the outputs of the bits of the register of the number of sub 5 intervals, the outputs of the bits of the second controlled counter are connected to the parallel inputs of the corresponding bits of the RF code coder, the encoder LF Code and Code Encoder 0 Table 2 Run ucmot HUKa Air 1 /four P g 22 28 23 29 i3 thirty 21 f 15 W / G G. 19 32 34 33 35 36 20 2 FROM 38.i - 38.2 M.i 41. n 42.1 42.P Fig.Z 38J 3 &. / 40 43 44 45 h code Code gain code ng1 VC - V From the progress of ZOycmpoucm yes about the deer To registration devices 5G 6G 7G 8) 4 fP (9) de Jff (e} fde 0 Q D6 rW to f (e} fde f in 0, 5 in w1ct4 ff (8) c / e ° 0.5 Q at, / g5 fn9) de, Gt5 lU (dfde at / L - F (dMv) oh g  , fF (9) de n ms) fd9 WFW F (Q) d9 Tnefde 0.2 in 5