Discussion
Integrating a message before a phase modulator produces
Answer: D
Because frequency is the derivative of phase, integrating first cancels the differentiation implicit in the relationship and the result is frequency modulation. That equivalence is the basis of the Armstrong transmitter, which phase modulates a crystal oscillator and integrates the audio to obtain FM. Amplitude modulation needs a quite different modulator. Doubling an index requires a gain change. And single sideband is an amplitude scheme entirely.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development