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In which of the modulation, the waveform is modified resulting in a signal where each quarter cycle is transposed.(a) AM(b) FM(c) PM(d) TMI had been asked this question in a job interview.My question is from Demodulation of DSB-SC in chapter Double Sideband Suppressed Carrier Modulation of Analog Communications

Answer»

Correct answer is (d) TM

The explanation is: In TM, the message signal is modulated by inserting inflections in the original waveform. The waveform is MODIFIED resulting in a modulated signal where each QUARTER cycle is TRANSPOSED in MODULATION process.



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