Q.

The disadvantage of preset equalizer is that

A. it doesnot requires initial training pulse
B. time varying channel degrades the performance of the system
C. all of the mentioned
D. none of the mentioned
Answer» B. time varying channel degrades the performance of the system
Explanation: the disadvantage of preset equalization is that it requires an initial training period that must be invoked at the start of any new transmission. also time varying channel can degrade system performance due to isi, since the tap weights are fixed.
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