SU1225028A1 - Device for controlling simplex radio station - Google Patents

Abstract

The invention relates to communication technology and can be used in devices for switching radio stations from transmission to reception. The purpose of the invention is to increase the speed of control. The device contains a block 1 transfer mode

Description

(BBBP), element OR 2, relay 3 with delay for release, key 5 and block 4 of formation of control pauses (BFCV), containing key 6, block 7 voice control (BUG), pulse generator 8, differentiating circuit 9 and comparator 10. With the arrival of a signal from another radio station, a relay 3 is triggered and supplies voltage via the OR 2 element to the BBPP 1 input, which breaks the radio station's switching control circuit. CFPC 4 is connected to the corresponding

The invention relates to communication technology, and more specifically to switching devices of radio stations from transmission to reception.

The purpose of the invention is to increase the speed of control.

The drawing shows a structural electrical circuit of the device.

The proposed device contains a block 1 transmission mode, an element OR 2, a relay 3 with a release delay, a block 4 forming control pauses, keys 5 and 6, a voice control unit, a generator of 8 pulses, a differentiating circuit 9, a comparator 10 ..

The device works as follows.

The input of relay 3 is connected to a corresponding in level receiving point at which the voltage depends on the presence. signal at the input of the reception. Relay 3 operates with the arrival of a signal from another radio station and applies a voltage through the OR element 2 to the input of block I of the transmission mode, which breaks the control circuit of the radio operating mode switching. After the signal at the reception input disappears, the voltage from the input of the IPI 2 element is removed through time t, since the relay 3 is supplied with a release delay. Therefore, this i-station can be switched on for transfer no earlier than tj after the previous one is turned off, if a higher priority radio station does not turn on earlier.

225028

the level of the point amplifier LF operating in the transmission path, since the amplifier LF is usually used alternately in the paths of reception and transmission, then during the control pause, the noise can turn on BUG 7, which doesn’t work the whole CFPC 4. To prevent this, the blocking of the BUG 7 input is introduced by the output impulse output pulse of the comparator 10. The goal is achieved by the introduction of the relay 3, the element OR 2 and the BFCV 4, .1 Cp. f-ly, 1 ill.

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The input of the block 4 forming control pauses is connected via a normally open key 6 to the corresponding level of the amplifier operating in the transmission path. Block 7 srabaty-. if there is an audio voltage at its input, i.e. while pronouncing the speech phrase in front of the microphone. A logical O from the output of block 7 keeps the generator 8 at the time of pronouncing the speech phrase in the inhibited state. In the pause between the phrases, the output of block 7 appears logical. As a result, the generator 8 begins to generate rectangular pulses that arrive at the differentiating circuit 9, from the output of which bipolar pulses corresponding to the front and rear edges of the pulses of the generator 8 are removed, and these bipolar pulses are relatively steep; fronts and exponential trailing fronts,, Comparator 10 is triggered only by pulses corresponding to the leading edge of the generator 8. The trigger threshold of the comparator 10 is set to about half the amplitude of the output pulse of the differentiating circuit 9. At the same time, its time constant is chosen one and a half times longer ; .. By changing the threshold of the comparator 10, you can adjust the duration of the pulse generated by it. Since the low-frequency amplifier is usually used alternately in the reception path and in the transmission path, during control

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Noise pauses noise can turn on block 7, which disrupts the operation of the whole block 4. To prevent this from happening, block input of block 7 is introduced by output pulse 4, i.e. the output pulse of the comparator 10.

Claims (2)

1. A control unit of a simplex radio station containing a blocking transmission mode, the output of which is connected via a key to the transmission input of a radio station, so that, in order to increase control efficiency, a relay is inserted into it the release delay, the OR element, and the block forming the control pauses, with the output Editor L.Povkhan Order 1969/59 Compiled by V. Dmitriev Tehred V. Kadar Corrector Circulation ° 624Subscribe VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 25028 of the radio station reception via series-connected relays with a release delay and the OR element is connected to the control input of the blocking unit from the transmission mode, the low frequency output of the transmitter is connected to the second input of the OR element via a control pause generation unit. 2. The device according to claim 1, TL and - JO, in that the unit for forming control pauses is executed in the form of a serially connected key, a voice control unit, a pulse generator that differentiates 5 cents and a comparator, the output of which is connected to the key input; the input of which and the output of the comparator are respectively the input and output of the block forming the control pauses. Proofreader A. Obruchar