Makasitomala ambiri amafunsa FMUSER nthawi zonse zamavuto okhudzana ndi ma transmitter. Pakati pawo, nthawi zonse amatchula mawu opotoka. Ndiye kupotoza ndi chiyani? Chifukwa chiyani pali kupotoza? Ngati mukupanga wayilesi ya FM ndipo mukuyang'ana katswiri Wotumiza wailesi ya FM, mutha kupeza malangizo ofunikira patsamba lino.

Timasangalala

Kodi Audio Distortion ndi chiyani?

Mwaukadaulo, kupotoza ndiko kupatuka kulikonse mu mawonekedwe a audio waveform pakati pa mfundo ziwiri panjira yolumikizira. Mukhozanso kumvetsetsa kuti kupotoza ndiko kusintha mawonekedwe oyambirira (kapena makhalidwe ena) a chinthu.

M'mawu, kupotoza ndi amodzi mwamawu ofala kwambiri kuposa momwe anthu ambiri amazindikira akamagwiritsa ntchito.

Mukulankhulana ndi zamagetsi, kumatanthauza kusintha mawonekedwe a mafunde a chizindikiro chonyamula chidziwitso mu chipangizo chamagetsi kapena njira yolumikizirana, monga siginecha yoyimira mawu kapena kanema woyimira chithunzi.

Pakujambula ndi kusewera, kupotoza kumatha kuchitika pazigawo zingapo pamakina omvera. Ngati ma frequency amodzi (mawu oyesera) akuseweredwa m'dongosolo ndipo zotulukapo zimakhala ndi ma frequency angapo, kupotoza kopanda mzere kudzachitika. Ngati kutulutsa kulikonse sikuli kolingana ndi mulingo wa siginecha yoyikidwa, ndi phokoso.

Nthawi zambiri, zida zonse zomvera zidzasokonezedwa pamlingo wina. Zida zokhala ndi zosavuta zopanda malire zidzatulutsa kusokoneza kosavuta; Zida zovuta kwambiri zimapanga zosokoneza zovuta zomwe zimakhala zosavuta kumva. Kusokoneza kumachuluka. Kugwiritsa ntchito zida ziwiri zopanda ungwiro mosalekeza kumapangitsa kuti makutu asokonezeke kwambiri kuposa kugwiritsa ntchito chipangizo chilichonse chokha.

Njira yosokoneza ma sigino amawu imakhala yofanana ndi pomwe chithunzi chikudutsa pagalasi lakuda kapena lowonongeka, kapena chithunzicho chitadzaza kapena "chowonekera".

Poganizira kumvetsetsa kumeneku, pafupifupi makina aliwonse amawu (kufanana, kuponderezana) ndi njira yosokoneza. Zina zimakhala zabwino. Mitundu ina ya kupotoza (harmonic kupotoza, aliasing, kudula, crossover kupotoza) amaonedwa kuti ndi osafunika, ngakhale kuti nthawi zina amagwiritsidwa ntchito bwino ndi kuonedwa ngati chinthu chabwino.

N'chifukwa Chiyani Kusokoneza Kuli Kofunika?

Kupotoza nthawi zambiri sikufunikira, choncho akatswiri amayesetsa kuthetsa kapena kuchepetsa. Komabe, nthawi zina, kusokoneza kungafunike, mwachitsanzo, kusokoneza kumagwiritsidwanso ntchito ngati nyimbo, makamaka pa magitala amagetsi.

Kuonjezera phokoso kapena zizindikiro zina zakunja (kung'ung'udza, kusokoneza) sikuganiziridwa kuti ndizosokoneza, ngakhale kuti mphamvu ya kusokoneza kwa quantization nthawi zina imaphatikizidwa ndi phokoso. Ma metrics apamwamba omwe amawonetsa phokoso ndi kupotoza amaphatikizapo chiŵerengero cha signal-to-noise ratio and distortion (SINAD) chiŵerengero ndi kusokoneza kwathunthu kwa harmonic kuphatikiza phokoso (THD+N).

M'machitidwe ochepetsera phokoso, monga dongosolo la Dolby, chizindikiro cha audio chiyenera kutsindika, ndipo mbali zonse za chizindikirozo zimasokonezedwa mwadala ndi phokoso lamagetsi. Ndiye ndi symmetrically "osapotozedwa" pambuyo kudutsa phokoso njira kulankhulana. Kuthetsa phokoso mu chizindikiro analandira.

Koma kupotoza sikovomerezeka kwambiri panthawi ya msonkhano chifukwa tikufuna kuti phokoso likhale lachilengedwe momwe tingathere. Mwachitsanzo, m’nyimbo, kupotoza kukhoza kupereka mikhalidwe ina ku chida, koma pakulankhula, kupotoza kungachepetse kwambiri kumveka bwino.

Kupotoza ndikupatuka kuchokera pamapindikira omveka bwino. Kusokoneza kumapangitsa kuti mawonekedwe a audio waveform asinthe, zomwe zikutanthauza kuti zomwe zimatuluka zimakhala zosiyana ndi zomwe zalowetsedwa.

Pofuna kupewa kupotoza, kupanga makina a zipangizo zomwe zimagwiritsidwa ntchito ndizofunikira kwambiri. Nthawi zonse gwiritsani ntchito cholimba komanso chokhazikika kuti mupewe kupotoza. Kugwiritsa ntchito zida zamagetsi ndikofunikira. Chiyerekezo cha ma sign-to-phokoso ndi mawonekedwe osunthika ayenera kukhala abwino kwambiri, osachepera mtundu wa CD, kuti igwire bwino ntchito.

Kuphatikiza apo, olankhula abwino kwambiri okhala ndi zosokoneza pang'ono amafunikira kuti ntchito monga kuletsa kwa echo zitha kugwira ntchito momwe zimayembekezeredwa.

N'chiyani Chimayambitsa Kusokoneza?

Pamene kutulutsa kwa chipangizo chomvera sikungathe kutsata zomwe zalowetsedwa bwino komanso molondola, chizindikirocho chidzasokonezedwa. Zida zamagetsi zoyera (ma amplifiers, DACS) zamaketani athu amawu nthawi zambiri zimakhala zolondola kwambiri kuposa zida za electroacoustic (zotchedwa transducers). Zomverera zimasintha ma siginecha amagetsi kukhala zoyenda zamakina kuti apange mawu, monga okamba - ndi mosemphanitsa, ngati maikolofoni. The kusuntha mbali ndi maginito zinthu za transducer kawirikawiri kwambiri nonlinear kunja yopapatiza ntchito osiyanasiyana. Komabe, mukakankhira chipangizo chamagetsi kuti chikweze chizindikirocho kuposa mphamvu yake, zinthu posachedwapa ziyamba kuipa.

Zotsatirazi ndi zomwe zimayambitsa kusokonekera:

• Ma transistors/machubu ofooka
• Zozungulira mochulukira
• Zotsutsa zosalongosoka
• Kulumikizana kotayikira kapena ma capacitor otayikira
• Kufananiza kolakwika kwa zida zamagetsi pa PCB

Kusokoneza kumagwiritsidwa ntchito mwaluso popanga nyimbo, koma ndi mutu wathunthu pawokha. Zomwe tikuyang'ana apa ndikuti kusokonekera pakutulutsa mawu - komwe kumadziwikanso kuti njira yosewera - kumatanthauza momwe mumamvera kudzera pa okamba kapena mahedifoni. Pakutulutsa mawu molondola, ichi ndiye cholinga chachikulu chazinthu za Hi-fi. Kupotoza kulikonse kumaonedwa kuti ndi koipa. Cholinga cha opanga zipangizo ndi kuthetsa kupotoza momwe angathere.

Mitundu Yakusokoneza

• The matalikidwe kapena nonlinear kupotoza
• Kusokoneza pafupipafupi
• Kusokoneza kwa gawo
• Wolokani kupotoza
• Kupotoza kosatsatana
• Kusokoneza pafupipafupi
• Kusintha kwa gawo

Wopanga Ma Transmitter Otsika Otsika Kwambiri a FM

Monga m'modzi mwa otsogola kwambiri padziko lonse lapansi zida zoulutsira wailesi opanga ndi ogulitsa, FMUSER yapereka bwino mawayilesi owulutsa masauzande ambiri ochokera kumaiko opitilira 200 padziko lonse lapansi okhala ndi ma transmitters amphamvu amphamvu kwambiri a FM, makina otumizira ma antenna a FM, ndi mayankho athunthu a mawayilesi, kuphatikiza chithandizo chaukadaulo pa intaneti ndi ntchito zonse zogulitsa pambuyo pogulitsa. . Ngati mukufuna chidziwitso chilichonse chokhudza kukhazikitsidwa kwa wayilesi, chonde omasuka lumikizanani ndi FMUSER ndipo tikuyankhani posachedwa!