20-07-2012, 01:59 PM
Terminal – 1 Question paper
12Terminal.docx (Size: 12.53 KB / Downloads: 61)
Part - A
1. What is modulation index? Write the expression for % of modulation in terms of AM wave
2. Compare SSB&VSB
3. A broadcast radio transmitter radiates 15KW, when the modulation percentage is 50. Calculate the carrier power
4. Compare the high level & low level modulation
5. Define phase modulation
6 .Define modulation index
7. Relate the modulation & frequency sensitivity
8. Define VCO
9. Explain Varactor diode
10. Write the disadvantage of balanced slope detector
PART-B
11 . (i)Discuss the type of AM modulator (8)
(ii)A certain transmitter radiates 10KW with the carrier unmodulated and 11KW , when the carrier is
sinusoidal modulated. Calculate the modulation index and percent of modulation .if another
sine wave, corresponding to 60 percent modulation, is transmitted simultaneously determine the
total radiated power (8)