SU779905A1 - Arrangement for monitoring phasing of transmitting station system - Google Patents

Description

. . . /. This invention relates to the field of (v

phase-measuring technology and can be used to control the installation of phases at the outputs of transmitting stations, working on the addition of a powerful S-channel on the air.

A device for measuring the phase shift is known, which can be used in monitoring the phasing and allowing for one period of the signal under study to measure the phase shift of the radio pulse voltage relative to the continuous reference signal and contains more than two driver, trigger, reference pulse generator, | 5 coincidence circuit and digital reading unit f 1.

The disadvantage of the device is the inability to measure the phase shift between two radio pulses, eg, jO, by the stubs that exist non-simultaneously.

A device for controlling a phasing is known, comprising - two limiter amplifiers, an output driver, a coincidence element, a phase counter, a display unit, and a counting pulse generator t2j.

The disadvantage of the device is a considerable time spent .30

the operator on the phasing of individual systems.

. The purpose of the present invention is to improve the speed of movement of the cont. the role of the phasing of the system of transmitting stations.

The goal is achieved so that the device containing the first and second amplifiers-limiters, the output of the second one is connected to; one of the input of the output driver, the first element of the match, the Phase counter connected to the inputs of the digital display unit and the generator of counting pulses is equipped with a block adjustable delays, Managed inverter, coarse-error exclusion unit, measurement resolution unit, pulse generator, divider, register, subtractive counter, OR element, second match element, a time interval slider and a correction block, the output of the first limit amplifier is connected to one of the inputs of the controlled inverter, the second input of which is connected to the second output of the coarse error exclusion unit, and the output to the first input of the adjustable delay block, the second input of which is RO2 to the first inputs of the coarse error prevention unit and the first element of the match, and to the output of the measurement resolution block, the BTopdro of the amplifier-limiter is connected to the third input of the adjustable delay block and to the second inputs s of the pulse former and the coarse error elimination unit, the third input of which is connected to the fourth input of the delay control unit, the output of which is connected to the first inputs of the subtracting counter and the pulse former, the first and second outputs of which are connected respectively to one of the inputs of the divider and the OR element, the output of the divider through the register is connected to the input of the number of the subtracting adder, the second input of which is connected to the generator with: em pulses and the second inputs of the divider and the first matching element, mp This is connected to the output of the OR element, and the output is connected via the second matching element to the other inputs of the OR element and the output driver, as well as to the fourth input of the coarse error prevention unit, the first and third outputs of which are connected respectively to one of the time interval counter inputs and a phase counter and the first input of the correction unit, the second, third and fourth inputs of which are connected respectively to the output of the time interval counter, to the output of the output driver, to the output of the first element coincide Neither the second input of the time counter intervals, one output of it is connected to the third input of the first element of the match and the other to the second input of the phase counter, the synchronization inputs of the adjustable delay unit, the pulse form, the divider and the register are combined. The drawing shows a block diagram of an apparatus for monitoring the phasing of a system of transmitting stations. The device for controlling the phasing of the transmitting station system contains the first and second amplifiers 1 and 2, a controlled inverter 3, a block with adjustable delay 4, a block for eliminating gross error 5, a block for resolving measurements b, a pulse driver 7, an output driver 8, a divider 9, register 10, subtractive counter 11, the element OR 12, the generator of the counting pulses 13, the first element of the match .14, the second element of the match 15, phase 16, the counter of the time interval 17, the correction correction unit 18 and the digital display unit 19.. The operation of the device is as follows. The input of the first amplifier 1 -g1 is a constant signal, which is repeated with some delays at the outputs of the transmitting stations of the monitored system. The pulse sequence from the output of the amplifier-limiter 1 passes unchanged through the controlled inverter 3 to the first input of the adjustable overhead unit 4, and from the output of the amplifier-limiter 2 enters the fifth input of the block 4.; - To memorize the phase of the reference PS, it is enough to determine and then periodically; reproduce time interval t messda with positive pulse fronts of sequences. To reduce the effect of interference, the interval must be determined as an average value over a certain number of periods of the signal under study. In the case of a small shift between pulses, it is possible that, due to the influence of interference, the interval f is determined as the average value between the quantities, some of which are close to b, and the other part to the period of the sines under study. Consequently, the determined value will have some random value. It is necessary to determine and exclude cases leading to the specified result. After receiving the command Start operation, register 10, divider 9 and pulse generator 7 are reset, and in block 4 a sequence of pulses is generated, the positive edges of which are delayed. In accordance with the telegraph signal at the input of the measuring resolution biv unit, depending on the communication conditions, the BRI b outputs to the second input of the RH4 4 a signal permitting the measurement. This signal is emitted over time, when the information inputs of the device receive signals from the same wireless telegraphic signal and reach the required level. During the time of the impact on the second input of the block 4 of the signal permitting the measurement, a sequence of pulses is fed to the first input of the pulse shaper 7. At the output of the shaper 7 n pulses are generated. During the duration of these pulses supplied to the first input of the divider 9 with the division factor n, the second input of the register 10 is allowed to pass the counting pulses coming from the generator of counting pulses 13 to the second input of the divider .9. The frequency of the counting pulses is much higher than the frequency of the studied signals. Thus, in register 10, a number is recorded corresponding to an average delay of positive pulse fronts. Until the end of the nth pulse at one output of the driver 7, the signal from the other output of it, through the element OR 12. : To the third input of the detracting counter 11, allows a parallel census of the contents of the register 10 to the counter 11. Starting from the moment the n-th pulse ends, the signal to the input of the limiting amplifier 2 from the reference transmitting station is not needed.

After the positive edge of a pulse arrives from the sequence used to store the phase at the first input of the subtracting counter 11 and as a result of the counting pulses at its second input, the subtraction is recorded from the number written to counter 11. At the moment all the bits of the counter 11 are set to zero state, at the output of the second element of coincidence 15, a pulse is generated, which acts through the element OR 12 on the third input of counter 11, causing a census of the contents of register 10 to counter 11. Hereinafter described the process is periodically repeated.

Then, instead of the signal from the output of the reference station, the input of the limiter 2 is given to the signal from the output of the station, the dephasing of which relative to the reference station is to be measured. If the signal phase is close to the reference phase, then as a result of interference, the time interval corresponding to the measured skewing may correspond either to a value close to 0, or to the period of the signal under study. The average value of this time interval for a certain number of periods of the signal under study may be a random value, which explains the possibility of occurrence of measurement errors. It is necessary to exclude such cases. After receiving the measurement command and the resolution signal from the output of block 6,: 4 reduces the delay of the positive edge of one pulse from the sequence used to store the phase of the reference PS. As a result, one of the pulses from the output of the second element of coincidence 15 will come to the fourth input of block 5 with one increment by a certain amount. If during the time more than doubled: the time from the moment of arrival of this pulse, a positive front arrives at the second input of block 5, this becomes the possibility of a gross error in the measurement. To eliminate the possibility of such an error, a corresponding signal is output to the first input of Correction Block 18 from the third output of Block 5, and a constant signal is sent to the control input of Inverter 3, leading to the inversion of the pulse sequence passing to the first input of Block 4. As a result

Such an inversion, a change in the position in time of the pulses at the output of the second element of coincidence 15 corresponds to the 180 phase shift of the signal from the reference station. After the end of the process of determining the possibility of gross error, the signal from the first output of block 5 permits the recording of counting pulses, which arrive at the second inputs of the time interval counter 17 and the phase counter 16 during the time of issuing the permission signal to the first input of the first coincidence element 14. Counting pulses the second input of the counter 17 is received directly from the output of the second element 14, and to the second input of the counter

5 16 come through the block 18, but only during the duration of the pulses coming from the output of the imaging unit 8 to the third input of the unit 18. The starting impulses of the output of the imaging unit 8

0 corresponds to the beginning of the pulses at its first input, and the end corresponds to the positive front at its second input.

At the time of filling the counter 17

5 to the second input of block 18, a signal is received, by which the pulses to the second input of counter 16 begin to pass continuously, but with a frequency two times less than the second input of counter 17. During the refill time of counter 17 with a capacity of 3.6-10 ( where K is a positive integer), on counter 16, an additional 1.8-10 pulses will pass, and in the case

5, the filling of the counter 16 with a capacity of 3, its bits are set to the initial (zero) state and the recording of pulses continues. The signal at the second input of block 18

0 at the moment of refilling the counter 17, results in the delivery to the third input of the first section 1: a 14 of a signal prohibiting the passage of counting pulses to its output. The number recorded in the three decimal places of the 5 dach counter 16 is displayed with the help of the digital display unit 19 and corresponds in degrees to the phasing of the measured station relative to the reference one. Skew measurement

0 of this station is terminated, the signal from its output to the input of the limiter 2 stops, the measurement command is stopped at the same time, as a result of which block 5 is set to its initial state, and the signal from its first output sets counters 16 and 17 to initial ones (zero ) State After applying to the input limiter 2 signal from the output

0 stations, the deformation of which is required to measure, the signal increases, the measurement is resumed and the measurement process is repeated.

The application of the invention will allow automatic control.

Claims (2)

5 phasing system of transmitting stations, working in telegraph modes in the presence of significant noise interference in the transmission channels of the signal from the outputs of the transmitting stations to the input of the equipment. Automating the monitoring process reduces operator loading, eliminates the possibility of subjective errors, and reduces the monitoring time of the PS-PS system, which is of great importance in the case of contacting the system before the communication session. The invention The device for monitoring the phasing of the system of the transmitting stations, containing the first and second amplifiers-limiting devices, the second one connected to one of the inputs of the output driver, the first matching element, a phase counter, connected to the digital inputs of the digital display unit and the counting pulse generator, This is due to the fact that, with the purpose of increasing speed, it is equipped with an adjustable delay unit, an inverter controlled, a unit for eliminating a gross error, a measurement resolution unit, a driver pulses, a divider, a register, a subtractive counter, an OR element, a second coincidence element, a time interval counter, and a correction input unit, the output of the first amplifier limiting device connected to one of the inputs of the controlled inverter, the second input of which is connected to the second output block of the elimination of a gross error, and the output with the first input of an adjustable delay block, the second input of which is connected to the first inputs of the elimination block of a gross error Tig of the first match element and to the output of the measurement resolution block, the OUTPUT the second limiting amplifier is connected to the third input of the adjustable delay unit and to the second inputs of the pulse shaper and the coarse error prevention unit, the third input of which is connected to the fourth input of the adjustable delay unit, the output of which is connected to the first inputs of the detracting counter and the pulse shaper, first and second. The swarm outputs of which are connected dooTo, respectively, to one of the inputs of the divider and the element OR, the output of the divider is connected through a register to the input of the number of the subtracter, the second input of which is connected to the counting pulse generator and the second inputs of the divider and the first match element, the third to the output of the OR element, and output - via the second element of the match, connected to the other inputs of the OR element and the output shaper, as well as to the fourth input of the coarse error exclusion unit, the first and third outputs of which are connected according to But with one of the inputs of the Time Interval counter, and the phase counter and the first input of the correction block, the second, third and fourth shoots of which are connected respectively to the output of the time counter, to the output of the Former, to the output of the first coincidence element and the second input, a time counter, one output of which is connected to the third frequency of the first element of coincidence, and the other to the second input of the phase counter, the synchronization inputs of the adjustable delay unit, pulse generator, deductor and registers merged. Sources of information taken into account during the examination 1. USSR author's certificate No. 359619, Cl. G 01 R 25/04, 1972. 2. Questions of radio electronics, series TRS 1976, No. 5, p, 177.