Discussion
Which measurement would fail to distinguish narrowband PM from AM?
Answer: D
A magnitude spectrum shows three lines in both cases and hides the phase relationship that separates them. The envelope trace settles it at once, since AM's varies and PM's does not. A power measurement distinguishes them too, because AM's total rises with modulation while PM's does not. And limiting destroys an AM signal while leaving PM intact. Choosing a measurement that responds to the actual difference is the point, and it is why magnitude-only displays can mislead.
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