SU571827A1 - Method of recording and reproducing broadband signals on magnetic record carrier - Google Patents
Method of recording and reproducing broadband signals on magnetic record carrierInfo
- Publication number
- SU571827A1 SU571827A1 SU7602357837A SU2357837A SU571827A1 SU 571827 A1 SU571827 A1 SU 571827A1 SU 7602357837 A SU7602357837 A SU 7602357837A SU 2357837 A SU2357837 A SU 2357837A SU 571827 A1 SU571827 A1 SU 571827A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- recording
- signal
- spectrum
- frequency
- record carrier
- Prior art date
Links
Description
(54) СПОСОБ ЗАПИСИ И ВОСПРОИЗВЕДЕНИЯ ШИЮКОПОЛОСНЫХ СИГОАЛОВ НА МАГНИТНОМ НОСИТЕЛЕ(54) METHOD OF RECORDING AND REPRODUCTION OF SHOCK-BAND SIGOALS ON A MAGNETIC MEDIA
вашюго сигнала формируют однопопосный радиосигтал , ширина спектра которого соответствует ширине полосы пропускани цепи головка-магштна neiiia-головка, а область девиации располагают ниже верхней частоты характеристики этой же цепи, при воспроизведении же исходную информацию восстанавливают путем переноса спектра воспроизводимого (жгнала.Your signal is formed by a single-pole radio signal, the spectrum width of which corresponds to the bandwidth of the neiiia-head head – magnetic circuit, and the deviation area is located below the upper frequency characteristics of the same circuit, while reproducing the original information is restored by transferring the reproducible spectrum.
Способ по сн етс эпюрами, приведенными на чертеже.The method is explained in the diagrams shown in the drawing.
Записьшаемый сигнал (эпюра 1) имеет спектр S с верхней граничной частотой f i. Этот сигнал модулируетс с частотой fo, котора больше частоты fi. После модул ции модулироваш1ьга сигнал получает девиацию At мгновенной частоты и спектр Sj (зшора 2). Радиосигнал пропускают через фильтр с козффнциентом передачи /Гф (жюра 3), имек ций граничную частоту f. Получают спектр 8} (эпюра 4). Использу гетеродинирование преобразуют радиосигнал с спектром 8з в сигнал со спектром 84 при частоте гетеродина f з (эпюра 5). Таким образом, радиосигнал со спектром 84 переходит в область более низких частот (зпюра 6). Гранична частота фильтра выбираетс ближе к нижнему значению мгновенной частоты f модулированного сигнала, чем к верхней частоте сигнала, частота же гетеродина выбираетс ближе к граничной тастоте фильтра. Запнсьшаемьш радиосипш поступает в канал записи-воспроизведени аппарата магнитной записи, имеющий коэффициент передачи К цепи головка-магнитна лента-головка с граничной частотой ff (зпюра7). При воспроизведении осуществл ют перенос спектра воспроизведенного сигнала 85 (зпюра 8), наприлтер, путем гетеродинировани с частотой f (эпюра 9) в сигнал со спектром 8б (зпюра 10) дл последующей коррекции и амплитудного ограничени , после которого получают сигнал со спектром 8 (эпюра 11) и дл получени спектра 83 демодулированного сигнала (зпюра 12).The recorded signal (plot 1) has a spectrum S with an upper cutoff frequency f i. This signal is modulated with a frequency fo, which is greater than the frequency fi. After modulating the modular signal, the deviation At is obtained at the instantaneous frequency and the spectrum Sj (zhor 2). The radio signal is passed through a filter with a transfer transfer factor / Gf (Jury 3), measurements of the cutoff frequency f. A spectrum of 8} is obtained (plot 4). Using heterodyning, a radio signal with a spectrum of 8z is converted into a signal with a spectrum of 84 at a heterodyne frequency of f 3 (plot 5). Thus, the radio signal with a spectrum of 84 is transferred to the region of lower frequencies (band 6). The limiting frequency of the filter is chosen closer to the lower value of the instantaneous frequency f of the modulated signal than to the upper frequency of the signal, while the frequency of the local oscillator is chosen closer to the boundary value of the filter. The radio beacon enters the recording-reproduction channel of the magnetic recording apparatus, which has a transmission coefficient K of the head-magnetic tape-head circuit with the cut-off frequency ff (7). During reproduction, the spectrum of the reproduced signal 85 (spine 8), for example, is transferred by heterodyning at a frequency f (plot 9) into a signal with a spectrum of 8b (spine 10) for subsequent correction and amplitude limitation, after which a signal with a spectrum of 8 (plot 11) and to obtain the spectrum 83 of the demodulated signal (see 12).
Таким образом,. помимо увеличени объемаIn this way,. in addition to increasing the volume
записьшаемой информации уве;шшваетс отноиюние сигнал/шум и полосы записьшаемых частот, что повышает достоверность записываемых и воспроизводимых широкополосных сигналов.The recorded information increases the signal-to-noise ratio and the bands of the recorded frequencies, which increases the reliability of the recorded and reproducible broadband signals.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU7602357837A SU571827A1 (en) | 1976-05-10 | 1976-05-10 | Method of recording and reproducing broadband signals on magnetic record carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU7602357837A SU571827A1 (en) | 1976-05-10 | 1976-05-10 | Method of recording and reproducing broadband signals on magnetic record carrier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU571827A1 true SU571827A1 (en) | 1977-09-05 |
Family
ID=20660494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU7602357837A SU571827A1 (en) | 1976-05-10 | 1976-05-10 | Method of recording and reproducing broadband signals on magnetic record carrier |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU571827A1 (en) |
-
1976
- 1976-05-10 SU SU7602357837A patent/SU571827A1/en active
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