Topic: Communication Systems
The intermediate frequency of a super-heterodyne receiver is 450 KHz. If it is tuned to 1200 KHz, the image frequency will be
- A. 750 KHz
- B. 900 KHz
- C. 1600 KHz
- D. 2100 KHz
Answer: D. 2100 KHz
Explanation: $f_{image}=f_{s}+2f_{IF} = 1200+2\times450 = (1200+900)kHz=2100kHz$.