SU30163A1 - Device for synchronization of mechanisms in the transmitter and receiver to images - Google Patents

Description

The invention relates to devices for synchronizing mechanisms in the transmitter and the image receiver, using two radio transmitters, whose carrier frequencies, after multiplying accordingly, give sonic beats. In the proposed device, the received tone signal is used to operate the Lakura wheels, which rotate the receiving and transmitting mechanisms,

The drawing shows a diagram of the proposed device.

Assuming that radio broadcasting of images is usually accompanied by radio telephone transmission, the invention aims to use a joint action of the carrier frequencies of both transmitters, both images and telephony, for the purpose of synchronizing transmitter motors and receivers.

The general mathematical dependence characterizing this method can be represented as:

kNp - mNv n or

 - kNp n (I)

(302)

Where:

Np is the carrier frequency of the telephone.

transmitter,

The NV-TO of the image transmitter, k and t-integers, the p-frequency of the beats feeding the Lakura wheel (500-2000 p / s).

The described synchronization method belongs to the group of forced synchronization systems, and the characteristic feature of this invention is the absence of an additional generator of synchronizing signals.

A prerequisite for the use of this synchronization system is the lack of a telephone transmitter

intense harmonic - go or

- for now. In transmitters, the 3rd order harmonic is most easily eliminated, then the most convenient ratio of frequencies of a telephone transmitter and an image transmitter should be considered a 1: 3 ratio, i.e. in formula 1 you need to put and.

Transmitters for telephony and television are common. The general scheme of the receiving device, using the proposed synchronization method, is presented in the attached drawing.

The receiver is divided into two AB parts, operating from one or two antennas. High-frequency oscillations in the image receiver, amplified by amplifier a, Detected and amplified at low frequency c, drive the light relay d of the receiver. The oscillations of the telephone transmitter, having passed the same way, are received by the reproducer F.

From the amplifier a, the high frequency passed through the buffer e (for example, one step of the amplification of high frequency) acts inductively on the unconfigured circuit p of the lamp detector q. The frequency of the telephone transmitter ie amplifier / is high, the buffer has passed and multiplied, according to

The above considerations, three times in the same circuit; & the detector.

The resulting beats are detected by detector g, filtered by filter g tuned to frequency n, and amplified by a low-frequency amplifier are applied to the electromagnets of the S Lakura wheel.

The subject of the patent.

A device for synchronizing the mechanisms in the transmitter and the image receiver, using two radio transmitters, whose carrier frequencies, after appropriate multiplication, give sound beats, characterized in that the received tone signal is used, after amplification and passing through the filters, for. the work of the wheels Lakura, rotating receiving and transmitting mechanisms.