Q.

If a frequency multiplier has a multiplication factor of 10, then the increase in noise level due to frequency multiplication is:

A. 10 db
B. 20 db
C. 25 db
D. 15 db
Answer» B. 20 db
Explanation: for a frequency multiplier, the increase in noise power is given by 20 log n, where n is the multiplication factor of the multiplier. substituting in the below equation, increase in noise level is 20 db.
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