SU1285612A1 - Device for measuring telegraphy working rate - Google Patents

Abstract

The invention can be used in training operators to transmit and receive Morse code characters. The purpose of the invention is to reduce the measurement time by displaying the speed of wiring in the pauses of the measured signal. The device contains two pulse drivers 1 and 2 pulses, a pause allocation unit (GDP) 3, a delay element (33) 4, a trigger 5, a key 6, a generator of 7 clock pulses, a shift register (SR) 8, n And 9 elements, a decoder 10, indicator 11 and two elements OR 12 and 13. When there is a pause between Morse code signs, which is 1.5 times longer than the pause between elements of a sign, the output of GDP 3 is affected by the impulse that comes through the element OR 13 to the input of CP 8 and sets it in the initial state, when on all outputs of CP 8 there is zero potential. At the same time on the indicator 11 the digit of the speed of wiring is fixed, fixed on the last pause between the elements of the sign. The goal is achieved by introducing shaper 2, GDP 3, EZ 4, CP 8 and elements OR 12 and 13. Examples of shapers 1 and 2 and GDP 3 are given. 3 Il. g (L

Description

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The invention relates to radio engineering and can be used to measure the speed of wiring during the training of operators in the transmission and reception of signs of Morse code.

The purpose of the invention is to reduce the measurement time by displaying the cabling speed in the pauses of the measured signal.

FIG. 1 shows a structural electrical circuit of the device; in fig. 2 is a structural electrical circuit of the pause allocation unit; in fig. 3 - timing diagrams for the operation of the device.

The device for measuring the speed of wiring contains the first 1 and second 2 pulse shapers, a pause output block 3, a delay element 4, a trigger 5, a key 6, a clock generator 7, a shift register 8, and elements (where n is the number of wiring speed gradations, in this device, p 20), the decoder 10, the indicator 11, the second 12 and the first 13 elements OR.

The pulse former 1 comprises a differentiation element 14, a diode 15 and a single pulse former 16.

Shaper 2 includes a diode 17 and shaper 18 single pulses.

The pause extraction unit 3 includes an inverter 19, a one-shot 20 and an element 21. The second input of the one-shot 20 serves to change the duration of the generated pulses when measuring the wiring speed over 20 groups per minute (there is a switch, which is not shown, in three positions: 10- 20, 17-34 and 30-50 groups per minute).

The device works as follows.

When the power is turned on, the shift register 8 is set to the initial state, the trigger 5 is set to the second position (at the second output, the unit potential). On display 11, 00 are highlighted.

Upon receipt of a Morse code signal (Fig. 3a) from the output of a telegraph key or transmitter (not shown) to the input of differentiation element 14 at the output of the latter due to the leading and trailing edges of the transmitted elements of the sign (points

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dash) a pulse sequence is formed, consisting of positive and negative pulses (Fig. 3B). Diode 15 transmits positive pulses to the driver 16, and diode 17 to shaper 18 transmits negative pulses. At the output of the imaging unit 1, a pulse sequence appears, formed 10 at the leading edge (Fig. 3b), and at the output of the imaging generator 2 - a pulse sequence formed by the falling edge (Fig. 3g) of the transmitted elements of the sign.

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The first pulse from the output of the imaging unit 1 is fed to the 4th delay element and to the first inputs of the And 9 elements. Since there is no logical 1 at the outputs of the shift register 8, then the outputs of the And 9 elements have a zero potential. Pulse delayed by a half-period from the output of the 4-delay element is fed to the input

5 write (second) shift register 8, writing 1 to its first bit (FIG. 3). The pulse from the output of the imager 2, corresponding to the beginning of the pause between the elements of the character 30, translates the trigger 5 into the first

position (fig.Ze). The unit potential from the first output of the trigger 5 enters the control input of the key 6, opens it and provides

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(time marks) from the generator 7 to the shift (third) input of the shift register 8 (fig.Zh). At the same time, 1 recorded in the first bit of the shift register 8, with a clock frequency of 500 Hz, is received sequentially from its output to the second inputs of elements AND 9. At the end of the pause between the elements of the sign on the driver 45, a pulse appears applied to the first inputs of the elements of AND 9. Depending on the length of the pause between the elements of the sign, a single impulse with i-ro

50 of the output of the shift register 8 (where i is any of the outputs from 2 to n) through the element AND 9-, goes to the i-th input of the decoder 10 (figure 3), providing the appearance of digits on its outputs,

55 corresponding to a certain (normalized) duration of the pause between the elements of the sign, which is fixed by the indicator 11 (Fig. 3i). At the same time, this pulse through the OR element 12 enters the second input of the trigger 5 and transfers it to the second position, stopping the supply of a single potential from the first output to the control input of the key 6 and the supply of the unit potential from the second output of the trigger 5 to the indicator 11, ensuring the flashing of the number showing the text transfer rate to the trainee (the number of groups per minute). The same impulse, passed through the element OR 13, arrives at the first input (setting to the initial position) of the shift register 8 and brings it to the initial state.

When the next pause between the elements of the sign arrives, the device works in the same way.

When the pause between the Morse code characters, which is 1.5 times longer than the pause between the elements of the sign, a pulse appears at the output of the block 3 in the pause (Fig. 3k), which through the element OR 13 goes to the first input of the shift register 8 and sets it in the initial state (at all outputs of the register - zero potential). Indicator 11 shows the digit of the speed of wiring fixed by the last pause between the elements of the sign.

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A device for measuring the speed of wiring, containing a series-connected clock generator and a key, the first driver of the pulses, the output of which is connected to the first inputs of the elements And, trigger, decoder, indicator, characterized in that, in order to reduce the measurement time by displaying the speed of wiring in the pauses of the measured signal, a pause separator connected in series is introduced, the input of which is connected to the input of the first pulse generator, the first the OR element and the shift register, the outputs of which are connected to the second inputs of the AND elements, the outputs of which are connected via the decoder to the indicator inputs, a delay element connected between the output of the first pulse shaper and the second input of the shift register, the second pulse shaper connected between the second output of the first pulse shaper and the first trigger input, the first output of which is connected to another input of the key, the output of which is connected to the third input of the shift register, the second element OR, including ny between the outputs of AND gates and the second inputs of the first OR gate and a flip-flop, the second output of which is connected to the other input of the indicator.

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Claims (1)

Formula. From acquisition A device for measuring the telegraphy speed, containing a series-connected clock pulse generator and a key, a first pulse shaper, the output of which is connected to the first inputs of AND elements, a trigger, a decoder, an indicator, characterized in that, with the aim of 10 reducing the measurement time by displaying the telegraphy speed in the pauses of the measured signal, a pause highlighting unit is introduced in series, the input of which · 15th is connected to the input of the first pulse shaper, the first the first OR element and the shift register, the outputs of which are connected to the second inputs of the AND elements, the outputs of which through 20 a decoder are connected to the indicator inputs, the delay element connected between the output of the first pulse shaper and the second input of the shift register, the second pulse shaper connected between the second output the first pulse shaper and the first trigger input, the first output of which is connected to another key input, the output of which 30 is connected to the third input of the shift register, the second OR element, including enny between the outputs of AND gates and the second inputs of the first OR gate and a flip-flop, the second output of which is connected to the other input of the indicator. Figure 2