SU966932A1 - Radio wire adapter - Google Patents

Description

one

This invention relates to radio engineering and can be used in dispatching systems.

A radio conductor adapter is known, containing a serially connected signal amplifier, a matching amplifier, a radio station, a signal level controller, and a first key whose output is connected to the input of a signal amplifier whose output is connected to the serially connected second key, the transmission control unit and the display unit whose output connected to the input of the delay unit and to the control input of the radio station, as well as serially connected receiving amplifier and receiving control unit, the output of which connected to the control “input of the second key 1.

However, in the known device, there is insufficient communication quality.

The purpose of the invention is improving the quality of communication by improving the electrical

The separation between the channels of reception and transmission,

This goal is achieved by the fact that a radiowire adapter containing a serially connected signal amplifier, a matching amplifier, a radio station, a signal level control and a first key, the output of which is connected to the input 10 of the signal body, the output of which is connected to the serially connected second key, the control unit transmission and display unit, the output of which is connected to the input of the delay unit and the control

15 to the input of the radio station, as well as series-connected receiving amplifier and receiving control unit, the output of which is connected to the control input of the second key, are sequentially connected to the OR element and the switch, when , output

The radio station is connected to another input. A switch, whose input is connected to the input of the receiving amplifier, and the output of the receiving control unit is connected to the control input of the first key.

The drawing shows a structural electrical circuit of the proposed device.

The device contains a signal amplifier 1, a matching amplifier 2, a radio station 3, a signal level regulator 4, a switch 5, a switch 6, a transmission control unit 7, a display unit 8, a delay unit 9, a reception amplifier Yu, a reception control unit 11, an OR element

12, switch 13. The device operates as follows.

In the initial state, the transmission channel is opened with key 6, and the reception channel is closed with key t.5.

When a signal is received from a wired line, it is normalized by amplifier 1 and fed to the input of the transmitter's modulator of the radio station 3. through matching amplifier 2. At the same time, the signal through key 6 is fed to the input of transmission control unit 7. Transmission control unit 7 converts a sinusoidal signal into a constant positive voltage (log. 1). The signal from the output of the transmission control unit 7 is fed to the input of the display unit 8 and turns on the antenna relay of the stationary radio station 3. Radio station 3 turns on. transfer mode. From the additional output of the transmission control unit 7 through the OR 12 element, a signal (log. 1) is fed to the switch

13, which was initially opened, and closes it, preventing false triggering of the control unit

11 admission. After termination of the transmitted message, the transmission control unit 7 returns to the initial state. The first input of the element OR 12 receives a signal (log. 1) from the output of the delay block 9 and additionally blocks the input of the receiving channel by closing the switch 13. After a certain time, the circuit returns to its original state. condition. In the reception mode, the signal from the output of the frequency amplifier of the stationary radio station 3 is fed to the input of the receiving amplifier 10 via the open switch 13. The amplified signal from the receiving amplifier 10 passes to the receiving control unit 11. It is similar to transmission control unit 7, C out.

Yes, the receiving control unit 11 receives a positive voltage (log. 1) at the control inputs of keys 6 and 5. The signal is not transmitted to the transmission control unit 7 and the signal goes through the level 4 regulator, the public key 5 enters the wire line.

A chain of delay block 9, element OR 12 is used to increase the stability of the device operation. When switching from a stationary radio station 3 from transfer to receive mode from output 10, the receiver's low-frequency amplifier passes a short but powerful enough pulse. This is due to the fact that at the transitional moment, the cushioning of the receiver does not work immediately, but after a certain time. Under the influence of this signal, the control unit operates with 11 reception, opening the key 5, and the pulse passes to the wire line. The sensitivity of the transmission control unit 7 is large enough, therefore, its false triggering may occur. The circuit of the delay unit 9 and the element OR 12 is designed to prevent the impulse from interfering with the output of the low-frequency amplifier of the radio station 3 to the wire line. To do this, at the moment when the transmission control unit 7 is turned off, the input of the element OR 12 is additionally shunted with a signal from the delay unit 9, closing switch 13 after turning off the antenna relay. Until then, it is closed by a signal from the auxiliary output of the control unit 7, by transmission.

Transmission control unit 7 is turned off only during speech pauses. This is due to the fact that the antenna relay is switched, the response time of which is sufficiently long, and when: tracking each word, speech signals are distorted.

The reception control unit 11 tracks each word, since its speed and key 5 are sufficient to transmit speech information to the line without distortion.

The introduction of the switch 13 at the input of the reception channel allows for improved electrical isolation of the channels. This ensures stable operation, provided that the sensitivity of the transmit and receive control blocks is high.

Claims (1)

Invention Formula Radiowire adapter containing serially connected