Nws txoj haujlwm yog los ua ke cov teeb liab video (VIDEO) thiab lub teeb liab suab (AUDIO) yog hloov kho rau hauv qhov chaw ruaj khov ntawm lub xov tooj cua zaus zaus oscillation teeb liab, video yog AM modulation, thiab lub suab yog FM modulation.
Digital TV modulators tau siv dav hauv kev hloov pauv ntawm digital cable TV pem hauv ntej-kawg los hloov cov suab thiab video teeb liab mus rau hauv xov tooj cua zaus teeb liab. Lub tswv yim suab thiab video teeb liab tuaj yeem hloov kho tsis tu ncua los ntawm kev hloov kho sab nraud, tso cai rau cov tswv yim ntawm 0.7 ~ 1.4V video teeb liab qhov chaw teeb liab thiab 0.775V± 10dB suab teeb liab. Nyob rau hauv ib txwm muaj qhov sib txawv ntawm qhov sib txawv, lub modulator tseem tuaj yeem hloov kho tsis tu ncua sab nraud. Cov duab tso zis yog zoo. Cov khoom siv ntau zaus synthesis technology nrog siab zaus stability.
