Q117 / 120 · VITEEE 2006 · Physics

The frequency of an FM transmitter without signal input is called

  • A
    the centre frequency
  • B
    modulation factor
  • C
    the frequency deviation
  • Correct answer
    D
    the carrier swing

Solution

In FM, carrier frequency is the constant frequency which is modulated by signal amplitude. It is also called carrier swing. (Centre frequency is $\mathrm{f}_{\mathrm{c}}$ in AM wave, frequency deviation $\delta=\mathrm{f}_{\max }-\mathrm{f}_{\mathrm{c}}$ mod ulation factor $\left.=\frac{\delta_{\max }}{\mathrm{f}_{\mathrm{c}}}\right)$

Hence, the correct answer is option: 'D'.

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