Xa kuziwa ekugcineni ukuhlambuluka komsindo, kukho iinkalo ezahlukeneyo ezimele zijonge kwaye ziqwalaselwe. Nangona uncinci owaziwa ngabaninzi, ukuphambana kwe-Intermodulation Distortion (okufingqiweyo njenge-IMD) kunokuba yinto eqhoshayo xa ibuyisela intloko yayo embi, ecacileyo. Ngokungafani nezinye iindidi zokuphazamiseka okuhlobene nomculo, Ukuphambana kwe-Intermodulation kubonakala kakhulu kwindlebe kwaye kungaba yinto enzima kunzima ukunciphisa iinkqubo zomsindo.
Yintoni Ukuphazamiseka Kwempahla?
Ukuphazamiseka kwe-Intermodulation kufumaneka njengemplifier okanye ukuchazwa kwangaphambili kwe-amplifier (kodwa kunokukhona kwezinye izixhobo zomsindo ezifana nezithethi, iiCD / iDVD / abadlali beendaba, njl.) Ezenza ukuba ii-non-harmoniic frequencies zongezwe kumqondiso wokufaka. Ifana ne-Total Total Harmonic Distortion , Ukuphazamiseka kwe- Intermodulation kulinganiswa kwaye kuboniswe njengepesenti yembonakalo yokuvelisa. Kwaye kunye neNombolo eHlaleni yeHarmonic, amanani aphantsi angcono ekusebenzeni ngcono.
Ukuphazamiseka kwe-Intermodulation kuyenzeka xa izibonakaliso ezimbini okanye ngaphezulu zixutywe kwidivaysi engenzi-linear amplifier. Ngamanye amathoni asebenzisana nomnye, avelise i-amplitudes (okanye i-modulated). Oku kubangela ukwakheka kwee-frequencies-ezidla ngokuba zibizwa ngokuthi "amabhande emacaleni" - engabonakali kwisignali sokuqala. Ekubeni ezi zikhundla ze-sideband zikhupha kwixabiso kunye nokuhluka kweetoni zangaphambili, zithathwa njengento engekho i-harmoniki kwaye ingathandeki kakhulu ngenxa yobume obungabonakaliyo.
Ngokomzekelo, sitsho ukuba isixhobo esisodwa sidlala inqaku kwaye sikhiqiza i-frequency frequency ye-440 Hz. Ii-Harmonic frequencies (iindidi eziphindaphindiweyo zezinto ezisisiseko) esinye isixhobo senzeke kwi-880 Hz, 1220 Hz, 1760 Hz, njalonjalo. Ukuba i-amplifier yenza i-frequency non-harmoniki ye-300 Hz kunye ne-frequency frequency ye-440 Hz, i-frequency frequency ye-740 Hz iya kuphinda ikhutshwe (440 Hz + 300 Hz), kwaye i-740 Hz ayikho i-harmoniki ye-440 Hz. Ngaloo ndlela, kuthiwa i-Intermodulation Distortion kuba iphakathi kwamaharmonic frequencies.
Kutheni ukuphazamiseka kwe-Intermodulation kubalulekile
Ekubeni ukuHlukana kwe-Intermodulation akuhambelani (kungekhona i-harmoniki), kuyimilinganiselo engakumbi. Yaye xa ikhona, kulula kakhulu ukuyithatha ngeendlebe kunokugqithisa kwe-harmonic, ekubeni i-harmonics ikhona ngokubanzi kwiimpawu zomsindo. Kodwa kumanqanaba amancinci aphantsi kunye / okanye ngomculo olula, ukuPhambuka kwe-Intermodulation akunakwenzeka. Iitoni ezahlukileyo zisenokuva ngokucacileyo. Kodwa xa ivolumu ikhuphukela kwindawo apho kungabikho ulayini phakathi kwe-amplifier, ukuguqulwa kunye nesizukulwana esingathandekiyo sobunzima bomdaka okanye ukutshatyalaza uphawu lwangaphambili.
Esi siphumo siphinde sihlanganiswe kunye neengoma zomculo eziyinkimbinkimbi (umz. Orchestra) apho kukho intsebenziswano enkulu phakathi kwazo zonke ii-frequencies. Kwaye isiphumo singabakho ukudala isandi somsindo esiphumelela ngokukhawuleza iinkcukacha zeengcamango kunye nokuchaneka. Eyona nto, ukuphambuka kwe-Intermodulation kukukhokelela kumculo onqambileyo, ogqithisiweyo, okanye ongenampilo. Okona kunzima, yonke into iyandiva ikhuni kwaye / okanye iphosakeleyo.
Nangona kunjalo, njengoko kuHlukaniswa kweHarmonic epheleleyo, ukuPhambuka kwe-Intermodulation ngokuqhelekileyo kuncinci kangangokuthi akupheli. Uninzi lwama-amplifiers lanamhlanje luyilwe ngokwaneleyo ukwenzela ukuba ukuPhambuka kwe-Intermodulation kungabalulekanga. Khawukhumbule nje ukuba iindlebe zakho zingumgwebi ongcono wekhwalithi ephilileyo, ngoko musa ukugweba izinto kuphela ngeenkcukacha zokuPhathwa kweModemu.