Computer-Networks

Question 707

Ten signals, each requiring 3000Hz, are multiplexed on to a single channel using FDM. What is the minimum bandwidth required for the multiplexed channel?

Assume that the guard bands are 300 Hz wide.

A	30,000
B	30,300
C	32,700
D	33,000

Computer-NetworksFDMKVS 30-12-2018 Part B

Question 707 Explanation:

Ch1 – gb -ch2-gb-ch3-gb-ch4-gb-ch5-gb-ch6-gb-ch7-gb-ch8-gb-ch9-gb-ch10. Where Ch represents channel and gb means guard bands.
There are total 10 channels and 9 guard bands.Each guard band is 300Hz wide
9 guard band occupies 2700 hz.
10 channels occupies 30000 hz.
So total bandwidth is 32700.

Correct Answer: C

Question 707 Explanation:

Ch1 – gb -ch2-gb-ch3-gb-ch4-gb-ch5-gb-ch6-gb-ch7-gb-ch8-gb-ch9-gb-ch10. Where Ch represents channel and gb means guard bands.
There are total 10 channels and 9 guard bands.Each guard band is 300Hz wide
9 guard band occupies 2700 hz.
10 channels occupies 30000 hz.
So total bandwidth is 32700.