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Module 1: Analog Modulation

20252m

VSB modulation is mainly used in
(i) AM radio
(ii) FM radio
(iii) TV video transmission
(iv) Satellite uplink

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Answer

Correct Option: (iii) TV video transmission

Explanation

VSB compromises: one sideband fully + vestige of other. Bandwidth fm+fvf_m+f_v (fv≈0.75f_v\approx0.75 MHz). SSB filter too sharp for video 4.24.2 MHz, DSB wastes 8.48.4 MHz. VSB saves ~50% vs DSB with practical filter.

TV video uses VSB (AM-VSB). AM radio uses AM, FM radio uses FM, satellite uses FM.

Final Answer

TV video → Option (iii).

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