SU120232A1 - Device for radio monitoring of simplex operation of ST-35 devices - Google Patents

Description

Operation of the ST-35 over shortwave radio lines is often unstable due to the presence of interference and fading. This necessitates reverse calibrations and re-transmissions that slow down radio communications.

In the proposed device, the radio operator of the transmitting station receives a reverse control of his work, taking into account the distortions in the radio link, which allows him to repeat distorted groups without need to request. For this purpose, it is proposed to use an additional relay at the receiving end, the winding of which is connected in series with the electromagnet, and the contact system is connected to the transmission circuit, which simultaneously performs the reverse transmission of the signal. In this case, for blocking the relay when transmitting current-free parcels, a capacitor charged with a rectified operating current is used.

FIG. 1 shows a simplified diagram of the transmit-receive path; in fig. 2 - schematic diagram of the device.

The transmitting and receiving path consists of a transmitter / and receiver 2 of the ST-35 apparatus, a relay 3 of the device for the radio control of the radio transmitter 4, the radio receiver 5 and the linear battery 6, as well as similar elements of the correspondent (marked with the same numbers with schtrich).

When the devices are at rest, the current passage in the circuit corresponds to the usual "duplex ST-35" mode with one device. When one of the devices starts to work, for example, the left one, the starting impulse transmitted by radio gives a currentless impulse at the receiving end. The winding of the relay 3 de-energizes, as a result of which the relay is activated and the transmitter circuit of the right station} breaks. This pulse is transmitted over the radio and is received by the receiver of the left station 5. In order for the relay 3 of the left station to not work in turn (which would lead to communication failure), it is held by a capacitor charged from the operating current rectifier.

No. 120232-2

The main elements of the device are the selenium bridge 7 and the capacitors 8 n 9. The selenium bridge 7, the windings of the relay 10 and the capacitor 8 are designed to lock the relays for the duration of the current P0 | The winding // is magnetic. Winding 12 is included in the operating current circuit. The terminal 13 connects the transmitter's manipulation line, and the terminal 14 connects the receiver's manipulation. The capacitor 9, together with the resistance 15, form a spark-suppressing circuit.

This scheme ensures the stable operation of the radio monitoring device, allowing you to the radio operator of the transmitting station to monitor the quality of radiogram transmissions on the radio link.

Subject invention

Claims (2)

1. A device for radio monitoring of simplex operation of ST-35 devices, characterized in that, in order to transfer telegrams faster in radio interference conditions, a polarized relay is used, the windings of which are included in the receiving electromagnet circuit, and the contact system is connected in series with the transmitter of the device CT-35, due to which the reception and retransmission of the control of its work are simultaneously perceived. 2. The device according to claim 1, exe; n; With the aim of blocking the relay during the transmission of current-free parcels, the variable component of the current, which appears during the operation of the transmitter of the ST-35 apparatus, is rectified selenium bridge and holds the relay bark in a position that ensures the preservation of the transmission chain. Fig 2