Vim li cas modem hu ua modulator thiab demodulator?

Cov txheej txheem:

Vim li cas modem hu ua modulator thiab demodulator?
Vim li cas modem hu ua modulator thiab demodulator?

Video: Vim li cas modem hu ua modulator thiab demodulator?

Video: Vim li cas modem hu ua modulator thiab demodulator?
Video: Muaj tsis ntshai tuag 7/1/2018 2024, Kaum ib hlis
Anonim

Modem luv rau "Modulator-Demodulator." Nws yog cov khoom siv kho vajtse uas tso cai rau lub khoos phis tawj lossis lwm yam khoom siv, xws li router lossis hloov pauv, txuas rau Is Taws Nem Nws hloov pauv lossis "modulates" cov teeb liab analog ntawm lub xov tooj lossis cable xaim. rau cov ntaub ntawv digital (1s thiab 0s) uas lub computer paub tau.

modem modulator-demodulator siv rau dab tsi?

A modulator-demodulator, los yog ib qho yooj yim modem, yog ib qho khoom siv kho vajtse uas hloov cov ntaub ntawv los ntawm hom digital, npaj rau kev sib txuas lus ncaj qha ntawm cov khoom siv nrog cov xov tooj tshwj xeeb, rau hauv ib qho tsim nyog rau qhov nruab nrab kis xws li xov tooj lossis xov tooj cua.

modem tseem npe nws hom dab tsi?

Muaj peb hom modem: cable, digital subscriber line (DSL) thiab dial-upIb lub cable modem siv coaxial cables uas txuas rau sab nraum qab ntawm modem thiab cov bolt zoo li qhov hluav taws xob hauv koj phab ntsa lossis ntawm koj lub thawv cable. Hom modem no muab kev kub ceev internet rau koj lub cuab yeej.

Puas yog modem yog ADC?

Modem qee zaum hu ua tus Analog-Digital Converter (ADC) lossis Digital-Analog Converter (DAC).

Puas yog lub modem modulate?

Lub khoos phis tawj ntawm koj kawg xav tau lub modem txhawm rau hloov kho nws cov teeb liab(ntxiv rau saum lub xov tooj analog teeb liab) kom lawv tuaj yeem taug kev hauv xov tooj ib yam li mloog koj lub suab.

Pom zoo:

Puas yog modulator thiab demodulator tib yam?

Puas yog modulator thiab demodulator tib yam?

Modulation thiab demodulation Modulation yog txheej txheem ntawm encoding cov ntaub ntawv hauv lub teeb liab kis tau tus mob, thaum demodulation yog txheej txheem ntawm extracting cov ntaub ntawv los ntawm cov teeb liab kis . Qhov txawv ntawm tus modulator thiab tus demodulator yog dab tsi?

Ntev npaum li cas yog coj los ua kab hnub thoob ntiaj teb thiab vim li cas?

Ntev npaum li cas yog coj los ua kab hnub thoob ntiaj teb thiab vim li cas?

Lub Hnub Nyoog Thoob Ntiaj Teb, tsim nyob rau xyoo 1884, hla mus rau nruab nrab-Pacific Dej hiav txwv thiab kwv yees ua raws 180 degrees longitude kab sab qaum teb-sab qab teb ntawm lub ntiaj teb. Nws nyob ib nrab ntawm lub ntiaj teb los ntawm qhov tseem ceeb meridian-lub zero degrees longitude tsim nyob rau hauv Greenwich, England, nyob rau hauv 1852 .

Vim li cas thiab vim li cas thiaj txhais tau?

Vim li cas thiab vim li cas thiaj txhais tau?

Txhua qhov laj thawj thiab qhov laj thawj, ib yam li hauv Nws tau mus rau qhov laj thawj thiab yog li ntawm lub koom haum kev saws me nyuam txoj cai thiab cov txheej txheem. Cov lus no niaj hnub no yog redundancy vim yog vim li cas thiab yog li ntawd txhais tau tib yamYav tas los, txawm li cas los xij, vim li cas thiaj qhia qhov laj thawj rau qee yam thiab yog li ntawd nws los ua li cas.

Puas knitting thiab crocheting tib yam yog vim li cas los yog vim li cas tsis?

Puas knitting thiab crocheting tib yam yog vim li cas los yog vim li cas tsis?

Knitting thiab crocheting is similar, tseem txawv. Ob qho khoom siv tes ua siv xov paj los ua cov khoom, tab sis knitting yog ua tiav nrog ob rab koob thiab cov stitches yog loops. Crocheting, ntawm qhov tod tes, yog ua tiav nrog ib qho crochet nuv thiab cov stitches zoo li cov pob me me .

Yuav sau li cas vim li cas thiab yog vim li cas?

Yuav sau li cas vim li cas thiab yog vim li cas?

Kev txhais ntawm yog vim li cas thiab (tus) yog li ntawd: yog vim li cas rau ib yam Nws piav qhia vim li cas thiab yog li ntawd ntawm tus nqi nce . Yuav ua li cas thiab yog vim li cas? Txhua qhov laj thawj thiab qhov laj thawj, ib yam li hauv Nws tau mus rau qhov laj thawj thiab yog li ntawm lub koom haum kev saws me nyuam txoj cai thiab cov txheej txheem.