Mita sabawa

Frequency - wannan shi ne daya daga cikin halaye na mawadãta daga cikin oscillations wani jiki yawa game da ta nufin darajar. A kimiyyar lissafi, akwai mutane da yawa irin na vibrations na daban-daban yanayi, misali, da hawa da sauka a cikin electromagnetic filin. Bugu da kari ga maras wata-wata electromagnetic taguwar ruwa na halitta asalin, akwai hawa da sauka, da ya faru na wanda aka bai da nufin mutum ya warware takamaiman matsaloli tasowa daga bukatun mutum aiki. Mafi sau da yawa ta wajen oscillatory matakai magance batutuwan da suka shafi makamashi da canja wurin da / ko bayanai, watau Yana da yake a sadarwar, rediyo, talabijin da kuma aiki, da dai sauransu

Kan aiwatar da watsa bayanai , ya hada da shirye-shiryen da m makamashi filin da ta daidaitowa na amfani siginar da aka samar da wani watsawa m mita tare da ayyana siga dabi'u - amplitude da mita. A farko siga ne kunnen doki da makamashi filin, da kuma kayyade watsa nesa, da kuma na biyu - da addressee. A wannan mataki da muka yi kawai m sigina, yin rawar da "m" data.

The bayanai abun ciki na makamashi filin da aka gabatar a cikin siginar da wani daidai canji wani na sigogi. A yi, amfani da daban-daban zabin gyara da filin sigogi - da kuma wannan tsari shine ake kira daidaitowa m mita. A wannan yanayin, da canji ne amfani m, ko da mawadãta daga m mita karkacewa. A mataki na zama rediyo akai-akai amfani da amplitude daidaitowa, inda bayanai da aka dauke a cikin mawadãta daga m sigina. A canje-canje a cikin m mawadãta daidaito
Bayani maimaita analog sigina. A mabukaci na'am da sigina
tushen da m mita, sa'an nan allocates demodulator žunsa
bayani. A low mitoci, har zuwa short-kalaman zangon, ta amfani kawai amplitude daidaitowa. Its main hasara ne da canji a cikin mawadãta daga m mita, saboda abin da sigina - amo rabo, wani muhimmin nuna alama daga cikin ingancin sadarwar tashar da aka rage.

Har ila yau, da amplitude daidaitowa, domin yada bayanai amfani da mita a da mita sabawa da ake amfani. A amfani da mita
daidaitowa - mafi girma amo rigakafi, don haka masu sana'a
Communications tsarin da ake amfani da musamman chastotnomodulirovannye sakonni. Misali na aikace-aikace na irin wannan sakonni - VHF rediyo, talabijin, musamman sadarwa.

Karkacewa - matsakaicin m mita canji dangi zuwa ga talakawan na da darajar. Da bakan da mita-modulated m oscillation dogara da mawadãta daga cikin amfani siginar da mawadãta ba bambanta, inda dangane da kwanciyar hankali ne ya fi yadda da farko.

da m mita domin mita daidaitowa na'urorin da ake kira modulators sigina. Rawar da suka taka a cikin riwayar da sigina na rediyo - da janareta iko watsawa m mita. Kayyade mita sabawa
bukatun ga da nisa daga cikin bandwidth na biyu da watsawa da karɓa.

Tun da babban bukata ce ga wani sadarwar tashar - watakila mafi m watsa daga cikin asali sigina, da bandwidth na shigar-fitarwa haihuwarka na mai karɓar kuma watsawa dole a kalla biyu da tamanin da asali siginar bandwidth. Duk da haka, a nan dole mu yi duba ga "zinariya nufin", saboda Sanadin karkacewa a kan watsawa gefen za a iya hade da parasitic oscillations lalacewa ta hanyar extraneous radiation biyu pickups, da kuma halittar katsalandan, kamar yadda hanya daya na mu'amala da irin wannan murdiya na siginar - ƙuntatawa na game da bandwidth. Yawancin magana game da dangantakar da ke tsakanin babban
Karkacewa halaye - da rocking band nisa na da bakan da daukar kwayar cutar sigina.

Idan daidaitowa fihirisa da babbar daraja duka biyu sigogi, wanda
halin da mita sabawa, suna da a} alla guda girma. A sabawa auna a raka'a mita Hz.