Txhawm rau kom tus txais txais pib lub xov tooj cua, nws yuav tsum tau muab kho rau hauv. Txoj kev uas lub cuab yeej teeb tsa yog nyob ntawm nws cov qauv siv. Muaj cov classic txais, cov ntsuas digital analog, thiab cov digital digital.
Cov Lus Qhia
Kauj ruam 1
Tsis hais txog ntawm tus qauv ntawm tus tau txais, xaiv cov kab uas xav tau ua ntej kho nws. Yog tias cov cuab yeej yog ib leeg-ntaus, koj tuaj yeem hla cov kauj ruam no. Cov kab hluav taws xob ntau tau muab faib ua lub thawb, thawb khawm, nruas. Qee tus neeg txais khoom siv nrog lub pob hluav taws xob txuas nrog kov lossis pseudo-kov tswj hloov chaw hloov. Qhov tom kawg yog feem ntau ntau rau cov khoom siv nrog cov xov tooj digital, tab sis qee zaus xws li kev daws teeb meem tau pom hauv cov khoom txais analog.
Kauj ruam 2
Ntawm qhov analogue tuned receiver, siv lub pob qhov rooj los xaiv qhov chaw nres tsheb hauv ntau. Raws li nws tig, cov xub txav raws lub nplai. Cov nplai tau muab faib ua cov ntu ua kom sib txawv rau ntau qib. Tsom rau thaj chaw uas sib raug mus rau ntau yam suav nrog thaum lub sijhawm. Cov nplai tuaj yeem ua tiav tsis tsuas yog nyob rau hauv cov ntsuas ntau zaus, tab sis tseem nyob ntawm cov khoom ntawm yoj yoj. Txhawm rau suav cov zaus los ntawm cov ntaub ntawv no, siv cov qauv hauv qab no:
F = c / λ, qhov twg F yog qhov zaus, Hz, c yog qhov ceev ntawm lub teeb, 299,792,458 meters ib ob.
Tshaj tawm cov ntaub ntawv thawj zaug hauv SI, thiab qhov tshwm sim yuav ua rau SI units.
Kauj ruam 3
Yog tias tus txais tau yog cov qauv ntawm analog, tab sis nruab nrog lub ntsuas phoo digital, kho nws kom zoo ib yam, tsuas yog nyeem qhov zaus raws li qhov ntsuas digital. Thov nco ntsoov tias tej zaum yuav muaj qeeb me ntsis hauv kev hloov kho lawv. Tseem nco ntsoov tias kev nyeem nplai digital yuav yog qee qhov tsis raug ntawm cov neeg tau txais pheej yig.
Kauj ruam 4
Yog tias tus tau txais lub nruab nrog lub tshuab hluav taws xob tsawg zaus, siv cov khawm khawm kom nkag mus rau nws tus nqi. Ib qho ntawm lawv txo qhov zaus, qhov tod nce nws. Qee tus neeg tau txais cov cuab yeej tseem tau nruab nrog lub pob qhov rooj sib piv - cov pob qhov rooj. Ib qho ntxiv, ntau lub xov tooj ntawm cov khoom siv high-kawg muaj cov keyboards rau ncaj qha nkag.
