SU1020982A1 - Frequency-modulated signal receiver tuning indicator - Google Patents

Abstract

INDICATOR OF THE SETUP OF THE RECEIVER OF THE FREQUENCY- / JUDULATED) (FM) SIGNAL, containing sequentially amplifying the amplitude detector, a constant-voltage amplifier into the optical pointer, as well as a non-linear unit, connected by an input to the output of the frequency detector, an optical pointer, and a non-linear unit connected to the output jack of the receiver. with. . By the fact that, in order to increase the efficiency of the rariae, between the outgoing amplifier of direct current and its control panel input, the loop consistently dnsf the circuit, the magical element, the threshold element and controlled by: pulse frequency, control input which is connected to the output of the nonlinear unit.

Description

The invention relates to a radioteductor and can be used in communications, broadcasting, and also measuring receivers.

Known indicator fine adjustment priekshika using a pointer (eg magnetoelectric device)

However, the indicated indicator, with an extremely high cost and large dimensions, has low reliability and is due to high sensitivity to mechanical overloads (vibrations)

The closest to the proposed FMR signal tuning setup shows the serially connected amplitude detector DC amplifier and onf.H4eo indicator, and the clock is not the 1st unit connected to the output of the frequency detector of the FM signal receiver la C23.

However, the well-known indicator does not provide the high accuracy of the receiver tuning, since the dependence of the light flux of the optical pointer on; at high levels of the latter, the latter has the character of a curve with saturation. In addition, the sensitivity of the human eye to changes in brightness decreases with increasing $ 5) bone

As a result, the resolution of the indicator is insufficient in those cases when it is necessary to have high tuning accuracy, for example, when receiving stereo & dacha, measurements, etc.). In addition, the effectiveness of a known indicator is subjectively not high enough due to a slight change in the int with the optical detuning indicator.

The purpose of the invention is to increase the resolution and efficiency of the tuning indicator.

The indicated distance is 1%: 1%, which is in the tuning indicator of the receiver of the FM signal containing a sequence. Amplitude detector, direct current amplifier and optical pointer, as well as an incomplete unit; , the threshold of the momentum in terms of the frequency of rea & peetoji w «pu% -.

The control input is connected to the output of the non-linear unit.

The drawing shows a structural electrical circuit of the device. The device contains a series-connected amplitude detector 1, a DC amplifier (UFD) 2 and an optical pointer (OA) 3, as well as a nonlinear unit 4 connected by an input to the output of the frequency detector 5 of the receiver, and an output to the controlled input of the UFD 2 via a controlled frequency generator 6 pulses, the input of which is connected to the output of the UFD 2, through the serially connected diff (phenium circuit 7, rectifier 3 and threshold element 9.

The device works as follows,.

With a fine tuning of the receiver, corresponding to zero of the first frequency detector, the voltage at the output of the nonlinear unit 4 is such that the frequency of the generator is 6 impulses modulating

UPT 2 is maximal and is equal to | several boDs of critical (visibility of flashes) and specific type of op amps, Cyr Neybyt Shoy (depends on indicator sensitivity) mismatch

the frequency of the generator 6 pulses / s decreases sharply - the initial (due to the change in 1 sf of the nonlinear unit) small decrease in the frequency of the hearth pulse for the calculation

During the course of the PFD, a proportional decrease in the ps of the supply voltage and the output of the shteles will result. This causes an additional-decrease in the frequency of the pulse generator. This regenerative

the process ends with a decrease in J {app of the output at the output of the headpiece 8 to some values (which is determined by the horn element 9, then the 1-futian characteristic is shown sharply

it is only detected and indicated by the frequency of the pulse generator on the input connected; with a non-linear block 4, Since a gain can be chosen. a slight, therefore,

in the remaining receiver bandwidth, gre% b occurs (and the setting

This means that with the most advanced receiver of the receiver, the monitor of the tfannuyu tonnaya is reduced to the information infrastructure (sheratora thereby both about the fact itself and about the extent of this analysis).

And {the same illumination of the lighting of the op amps in the dosing of the grain does not change the m63 102O982.,

The burner is chosen optimal for yes. The proposed device allows

the ambient lightness of the ambient light. greatly enhanced crucial way

It will only be stored at the level of the ItSHankaTopa level and its effectiveness

С1е | drove in the path. the disappearance of the pitch most realize vysszhuyu.

for example, with full detuning of the receiver, and therefore,

| 1f1E shaft / optical pointer 3 gaomesh | Shvt sayit sitala

Iig.conditioned by inaccurate customization.

Claims (1)

The FREQUENCY-MODULATED (FM) SIGNAL RECEIVER SETTING INDICATOR, which contains a series-connected amplitude detector, a DC amplifier and an optical pointer, as well as a non-linear unit connected to the output of the frequency detector of the FM signal receiver, also distinguishes it from second to second. I . in order to increase the resolution, a differentiating circuit, a rectifier, a threshold element and a frequency-controlled pulse generator, the control input of which is connected to the output of the nonlinear block, are connected in series between the output of the DC amplifier and its control input.