Discussion
An intermediate frequency amplifier gives \( 60 \ \mathrm{dB} \) of gain and the mixer has \( 6 \ \mathrm{dB} \) of conversion loss. The net gain from mixer input to detector is
Answer: D
Gains and losses add in decibels once the sign is respected:
\[ -6 + 60 = 54 \ \mathrm{dB} \]
giving 54 dB. Adding without regard to sign gives 66 dB, and the remaining options multiply or divide quantities that should be added. Working in decibels reduces a cascade to arithmetic, but only if a loss is entered as a negative gain, which is the single convention the notation depends on.
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