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Which of the following is a disadvantage of tone-in-band SSB system?

Which of the following is a disadvantage of tone-in-band SSB system? Correct Answer Generation and reception of signal is complicated

Tone-in-band SSB systems has the advantage of maintaining the low bandwidth property of the SSB signals, while at the same time providing good adjacent channel protection. The tone in band system employs feedforward automatic gain and frequency control to mitigate the effects of multipath induced fading.

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