SU402161A1 - DEVICE FOR CONTROL OF AVAILABILITY AND TYPE OF MODULATION AT THE TRANSMITTER OUTPUT - Google Patents

Description

one

The device can be used to monitor the performance of both automated and non-automated radio transmitters in all modes of operation and in all types of modulation of the high-frequency sigal.

A device is known for controlling the presence and type of modulation on the transmitter output, containing at the input a communication element with the transmitter output, and at the output - an ipdaccip block of the presence and type of modulation.

The purpose of the invention is to accelerate the distinguishability of modulation types.

This is achieved by the fact that the output of the communication element of the proposed device is connected to one input additionally by introducing the phase detector directly, and to the other through a delay line, the output of the phase detector being connected to the input of a pulse frequency meter, to the output of which two parallel elements connected in parallel are connected with indicator relays.

The presence of a modulation of the output high-frequency signal of a radio transmitter is detected by the appearance of an interleave component, and the form is registered by the frequency of the output voltage of the phase detector recorded by the display unit of the presence and type of modulation.

The drawing shows a block diagram of the proposed device.

The device contains a transmitter 1, a communication element 2, a delay line 3, a phase detector 4 and a display unit 5 of the display and modulation, containing a nm-frequency frequency meter 6, norm elements 7, 8, and indicator relays 9.

At one of the inputs of the phase detector 4, high-frequency spgnal from the output of transmitter 1 is fed through element 2 of communication, and another

its input is via link 2 and delay delay 3. The detector converts high-frequency TOTHbiii to low frequency, the frequency and frequency of which is determined by the phase, amplitude and frequency relations

components of the spectrum of the signal, as well as detector parameters, and delay parameters. The frequency of the output detector of the detector is determined by the frequency of the mappule cpn in the frequency telegraph mode: the total frequency of manniluy for the first and second channels in the DPT mode (dual frequency telegraph); multiplicity n speed prn fafazovo11 telegraphy; velocity n value of the modified phase during phase modulation;

amplitudes, frequencies, and phases of the components of the modulating signal spectrum in single-pole modes of operation.

The output nanowire detector detects extreme values at maximum

change modulated sigpal parameters. From the detector output, the voltage goes to the display unit 5 of the presence and type of modulation, consisting of a pulse frequency meter 6, threshold elements 7, 8 and indicator relays 9. In the absence of modulation of the output high frequency signal of the non-sensor, the high frequency signals arrive at the second and second inputs but shifted to phase by a delay line, as a result of which a constant potential appears at the detector output, which is detected by block 5 as the absence of modulation of the output high-frequency signal of the radio transmitter. When modulation is present, the output of the frequency meter is removed, the voltage is proportional to the frequency of the output voltage of the detector, which is the hallmark of the type of modulation. The coupling from the output of the frequency meter is applied to the threshold elements 7, 8, one of which suppresses the voltage, the value of which is determined by the frequency of manipulation during telegraphic modulation, and the other - the voltage, the value of which is determined by the frequency of the detector transmission of analog information (telephone mode). From the threshold elements, the voltage is fed to the indicator relays 9, which consist of a time relay and executive relays. The time relay has an adjustable delay and release time, which means that during short pauses in the transmission of information, the operation of the executive relays indicating the absence of modulation is excluded. Indicator relays give signals of the presence and type of modulation of the output signal of a non-transducer. Subject of the Invention A device for coitrol and forcing and modulation at the transmitter output, containing an input element of communication with the transmitter output and, at the output, a display indicating the presence and type of modulation, characterized in that the output of the communication element is connected to one input of the additionally introduced phase detector directly, and to the other via a delay line, the output of the phase detector being connected to the input of a pulse frequency meter, to the output of which two are connected threshold elements connected to indicator relays.