Electronics and Communication Engineering - Communication Systems - Discussion
Discussion Forum : Communication Systems - Section 25 (Q.No. 4)
4.
An FM radio receiver which is tuned to a 91.6 MHz broadcast station may receive an image frequency of __________ MHz.
Discussion:
7 comments Page 1 of 1.
Tamzilan said:
8 years ago
Option A is correct.
FM Intermediate frequency 10.7 MHz.
Here FM receiver tuned frequency is 91.6 MHz.
Receiver tuned frequency - Intermediate frequency = Signal frequency.
91.6 - 10.7 = 80.9 MHz.
Image frequency = Signal frequency + 2 * Intermediate frequency.
80.9 + 2 * 10.7 = 102.3 MHz.
FM Intermediate frequency 10.7 MHz.
Here FM receiver tuned frequency is 91.6 MHz.
Receiver tuned frequency - Intermediate frequency = Signal frequency.
91.6 - 10.7 = 80.9 MHz.
Image frequency = Signal frequency + 2 * Intermediate frequency.
80.9 + 2 * 10.7 = 102.3 MHz.
Surampudi joseph said:
1 decade ago
Answer: IF intermediate frequency : 10.7MHz.FM receiver operates 88-108MHz.FM local oscillator operates 98.7-118.7MHz.
Tuned frequency is 91.6MHz and corresponding oscillator frequency is 102.3MHz. Then image frequency is 102.3+10.7 MHz = 113MHz.
Tuned frequency is 91.6MHz and corresponding oscillator frequency is 102.3MHz. Then image frequency is 102.3+10.7 MHz = 113MHz.
Rajeev said:
1 decade ago
Hi @Joseph,
How you got this corresponding oscillator frequency is 102.3MHz? Could please explain in steps?
How you got this corresponding oscillator frequency is 102.3MHz? Could please explain in steps?
Divya said:
9 years ago
The typical value of the intermediate frequency of FM is 10.7MHz.
That is why we took it.
That is why we took it.
Vini said:
1 decade ago
If 10.7 mhz image frequency = 91.6+2*10.7 = 113.
Merwan said:
3 years ago
Hanks for explaining @Tamzilan.
Sujata said:
1 decade ago
How this answer come?
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