Apha, iimpawu ezine ezisisiseko zerediyo zerediyo zerediyo ziya kutolika kwiinkalo ezine: ujongano oluncinci lwerediyo, uphawu oluncinci lwesiginali, kunye nezinto ezibalulekileyo zomjelo, kunye nezinto ezibalulekileyo zokunikwa kwenkqubo yePCB.
Umnxibelelaniso weRediyo yerediyo ye-Dadia Heartionation Ukulinganisa
Ukusasazeka kwentambo ngaphandle kwamacingo kwaye afumana ngokwama-joring ahlulwe ngokwamacandelo amabini: isiseko se-ratenancy kunye nerediyo. Irensiseko yesiseko ibandakanya uluhlu lwe-frequency yemveliso yegalelo le-Transmit yodluliselo kunye nodidi lwendlela yokuphuma komqondiso womsebenzi. I-bandwidth yefreyimu esisiseko ichaza inqanaba lesiseko apho idatha ingena kwinkqubo. Isiseko senziwe rhoqo sisetyenziselwa ukuthembeka komgaqo wedatha kunye nokunciphisa umthwalo omiselwe yindawo yokudluliselwa kwenqanaba lokuhambisa idatha phantsi kwenqanaba lokuhambisa idatha phantsi kwenqanaba lokuhambisa idatha phantsi kwenqanaba lokuhambisa idatha phantsi kwenqanaba lokuhambisa idatha. Ke ngoko, kuninzi oluyisigama lolwazi lobubanzi oluyisiginali kuyadingeka xa uyilo lwesekethe olusisiseko kwi-PCB. Isekethe yerediyo yerediyo yesakhiwo iguqula kwaye iguqule-iguquli-iguqule i-Sprised Basebbal kwijelo elichongiweyo, kwaye liyikhuphele lo mqondiso ungene kwiPrive. Ngokuchasene noko, irediyo yerediyo ye-radicanced inokufumana isiginali evela kwiphakathi, kwaye iguqule kwaye inciphise i-frequency kwisiseko senziwe rhoqo.
I-Transmitter ineenjongo ezimbini zoyilo lwePCB: Eyokuqala kukuba kufuneka zidlulisele amandla athile ngelixa uchitha amandla amancinci anokwenzeka. Okwesibini kukuba abanakuphazamisa ukusebenza kwesiqhelo kokuguqulelwa kweendlela ezikufuphi. Ukuya kuthi ga ngoku umntu ofumanayo, kukho iinjongo ezintathu zokuyila i-PCB: Okokuqala, kufuneka babuyisele imiqondiso encinci; Okwesibini, kufuneka bakwazi ukususa imiqondiso ephazamisayo ngaphandle kwesitishi esifunekayo; kwaye okugqibela, njenge-dismitter, kufuneka basebenzise amandla amancinci kakhulu.
I-Bigring Primer ye-Radia Prequency Sport Ukulinganisa
Umamkeli kufuneka athobele kakhulu imiqondiso emincinci, nokuba kukho imiqondiso enkulu yokuphazamiseka (intengiselwano). Le meko yenzeka xa izama ukufumana umqondiso obuthathaka okanye umgama omde, kunye nokudluliselwa okunamandla okufuphi kusasazwa kwijelo elikufuphi. Umqondiso wokuphazamiseka usenokuba yi-60 ukuya kwi-70 i-DB inkulu kuneso signali, kwaye inokugutyungelwa kwisigaba sokufaka, okanye umamkeli unokufumana ingxolo enkulu ngexesha lokwamkelwa kwezimbonono eziqhelekileyo. Ukuba umamkeli uqhutywa kwingingqi engafakwanga ngumthombo ongenakuphazamiseka ngexesha lokufaka, ziya kwenzeka ezi ngxaki zimbini. Ukuphepha ezi ngxaki, ukuphela komntu omkelweyo kufuneka kube ngumthonyama kakhulu.
Ke ngoko, "ilayini" ikwabalulekile kwi-PCB yoyilo lomva. Kuba umamkeli yisekethe ye-narwband, ukungabinamfanekiselo kulinganiswa ngokulinganisa "ukugqwetha kwemidlalo rhoqo". Oku kubandakanya ukusebenzisa amaza amabini e-sine okanye amaza e-cosine anezantya ezifanayo kwaye abekwe kwibhendi yeziko ukuqhuba umqondiso wegalelo, aze emva koko alinganise imveliso yokuhamba phambili. Ngokubanzi, iziqholo zichitha ixesha elininzi kunye nexabiso eliphantsi lokulinganisa, kuba kufuneka ukubala ukubalwa kwezinto ezininzi zokufumana isisombululo senziwe rhoqo ukuze siqonde ukugqwetha.
Isibonakaliso esincinci esilindelweyo kwi-RF Ukulinganisa
Umamkeli kufuneka aveze kakhulu ukufumana imiqondiso encinci yokufaka. Ngokubanzi, amandla okuphuma komntu ofumanayo anokuba mncinci njenge-1 μv. Imvakalelo yomntwana ofumanayo inqunyelwe ngesandi esiveliswe yisekethe yayo yokufaka. Ke ngoko, ingxolo yinto ebalulekileyo kwi-PCB uyilo lomfumene. Ngapha koko, ukukwazi ukuqikelela ingxolo kunye nezixhobo zokulinganisa kubalulekile. Umzobo 1 yi-superheterodyne eqhelekileyo. Umqondiso ofunyenweyo ucociwe kuqala, kwaye ke umqondiso wegalelo unikezelwa yingxolo yengxolo ephantsi (i-LNA). Emva koko sebenzisa i-oscillator yokuqala yasekhaya (i-LO) ukuxubana nomqondiso wokuguqula lo mqondiso kwi-frequency ephakathi (ukuba). Intsebenzo yengxolo yesekethe yangaphambili ikakhulu ixhomekeke kwi-LN, umxube kunye ne-LO. Nangona uhlalutyo lwengxolo yesiqhelo lunokufumana ingxolo ye-LN, ayisebenzi kumxube kwaye yabona, ngenxa yokuba ingxolo kwezi bhloko ziya kuchaphazeleka kakhulu ngumqondiso omkhulu we-LOR.
Umqondiso wokufaka omncinci ufuna ukuba umamkeli abe nomsebenzi omkhulu, kwaye idla ngokufuna ukufumana inzuzo ye-120 DB. Ngoncedo oluphezulu olunje, nawuphi na umqondiso odityanisiweyo kwimveliso iphela ibuyela kwisiphelo sokuqala kunokubangela iingxaki. Isizathu esibalulekileyo sokusebenzisa i-SuperheterodyE uyilo loyilo kukuba inokusasaza inzuzo kwiindlela ezininzi zokunciphisa ithuba lokudibanisa. Oku kukwenza ukuba i-frequency ye-versive yahluka kwi-frequency yomqondiso wegalelo, enokuthintela imiqondiso enkulu yokubonisa ukuba "ingcolisekile" kwimiqondiso encinci yokufaka.
Ngenxa yezizathu ezahlukeneyo, kwezinye iinkqubo zonxibelelwano ezingenazingcingo, ukuguqulwa ngokuthe ngqo okanye uyilo lweHomodyne Koyilo, umqondiso wegalelo rf uguqulwa ngokuthe ngqo kwi-frequency esisiseko kwinyathelo elinye. Ke ngoko, uninzi lwenzuzo kukwindlela yokuziphatha esisiseko, kwaye imvana ye-LO kunye nomqondiso wegalelo uyafana. Kule meko, impembelelo yenani elincinci lokudibanisa kufuneka iqondwe, kwaye imodeli eneenkcukacha 'yendlela eqingqiweyo "kufuneka isungulwe, kunye ne-pins, kunye ne-vios, kunye nokudibanisa komgangatho.
Ukuphazamiseka kwejelo lomjelo ekufuphi nerediyo kwi-disquency yokulinganisa
Ukugqwetha kwakhona kudlala indima ebalulekileyo kwiswinti. Umgca ongenamgca oveliswe nguStafitter kwisekethe yemveliso inokusasaza i-bandwidth yophawu olugqithisiweyo kwiindlela ezikufuphi. Le phengnomeno ibizwa ngokuba yi "Fipcrallyth". Phambi kokuba i-Storive ifikelela kwi-Amptimimier ye-Amplimifi (PA), bandwidth bawo banqongophele; Kodwa "i-digrimor ye" "-mpotion" kwi-PA iya kubangela ukuba abantu baphendulwe baphinde. Ukuba i-bandwidth ikhule kakhulu, idluliselo ayiyi kuba nakho ukufikelela kwiimfuno zamandla kweziteshi zayo ezikufuphi. Xa udlulisa imiqondiso yemodyuli enemifanekiso, enyanisweni, iziqholo azinakusetyenziselwa ukuqikelela ukukhula okuthe kratya kwe-spectrum. Kuba ukuhanjiswa kweempawu ezili-1 000 (isimboli) mazibekwe ukufumana i-spectrum yommeli, kunye namaza abakhweli abaphantsi kakhulu kufuneka badityaniswe, eziya kwenza uhlalutyo lwe-Spice olungenanto.
