SU1451871A1 - Frequency manipulator - Google Patents
Frequency manipulator Download PDFInfo
- Publication number
- SU1451871A1 SU1451871A1 SU874243148A SU4243148A SU1451871A1 SU 1451871 A1 SU1451871 A1 SU 1451871A1 SU 874243148 A SU874243148 A SU 874243148A SU 4243148 A SU4243148 A SU 4243148A SU 1451871 A1 SU1451871 A1 SU 1451871A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- frequency
- input
- control
- phase detector
- output
- Prior art date
Links
- 230000002441 reversible effect Effects 0.000 claims abstract 4
- 230000036039 immunity Effects 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
Landscapes
- Mobile Radio Communication Systems (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
Изобретение относитс к радиотехнике и может использоватьс в передатчиках многоканальной св зи. Цель изобретени - уменьшение внепо- лосных излучений. Манипул тор содержит опорнй г-р , фазовьм детектор 2, фильтр 3 нижних частот, г-р 4, управл емый напр жением, блок 5 управлени частотой, делитель 6 частоты с переменным коэф. делени . Введены блок 7 управл емой задержки и реверсивный счетчик (PC) 8. В соответствии с выбранной величиной сдвига D блок 5 формирует из входного телеграфного сигнала (ТС) управл ющее напр жение, поступающее на г-р 4 и осуществл ющее изменение его частоты. Закон изменени управл ющего напр жени может повтор ть закон изменени входного ТС или же отличатьс от него наличием скруг- лений на фронтах, позвол ющих уменьшить интенсивность внеполосного излучени у частотно-манипулированно- го сигнала (ЧМС) Благодар использованию PC 8, тактируемого , и управл емого ТС, а также блока 7, позвол ющего формировать требуемую при данной позиции ТС частоту на входе фазового детектора 2, кольцо фазовой автоподстройки частоты в устр-ве стабилизирует несущую частоту ЧМС на выходе г-ра 4 при малых частотных сдвигах (D ). Это повышает помехоустойчивость линии св зи. 2 ил. SS (ЛThe invention relates to radio engineering and can be used in multi-channel communication transmitters. The purpose of the invention is to reduce out-of-band emissions. The manipulator contains a reference switch, phase detector 2, low pass filter 3, turn 4, voltage controlled, frequency control block 5, frequency divider 6 with variable coefficient. division. A control delay block 7 and a reversible counter (PC) 8 are entered. In accordance with the selected shift value D, block 5 forms a control voltage from the input telegraph signal (TC), which arrives at r-4 and changes its frequency. The law of variation of the control voltage may repeat the law of variation of the input TC or may differ from it by the presence of roundings at the fronts, which make it possible to reduce the intensity of out-of-band radiation from the frequency-manipulated signal (HMS) due to the use of PC 8, clocked and controlled of the vehicle, as well as of unit 7, which allows forming the frequency required at a given position of the vehicle at the input of the phase detector 2, the phase-locked loop of the device in the device stabilizes the carrier frequency of the HMS at the output of r-4 at small frequencies Different shifts (D). This increases the noise immunity of the communication line. 2 Il. SS (L
Description
иand
о ниthey
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU874243148A SU1451871A1 (en) | 1987-05-13 | 1987-05-13 | Frequency manipulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU874243148A SU1451871A1 (en) | 1987-05-13 | 1987-05-13 | Frequency manipulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1451871A1 true SU1451871A1 (en) | 1989-01-15 |
Family
ID=21303548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU874243148A SU1451871A1 (en) | 1987-05-13 | 1987-05-13 | Frequency manipulator |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU1451871A1 (en) |
-
1987
- 1987-05-13 SU SU874243148A patent/SU1451871A1/en active
Non-Patent Citations (1)
| Title |
|---|
| Патент FR № 2250226, кл. Н 03 С 3/16, 1976. * |
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