The digital signals are used for transmission in communication systems. They are
- Aonly of discrete stepwise values.
- Bsound and picture signals in television.
- Ccontinuous variations of current or voltage.
- Dfundamental sine waves.
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Each television channel is allocated a bandwidth of approximately ........?
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View Solution$A$ carrier wave of peak voltage $15 \,V$ is used to transmit a message signal. If the modulation index is $60 \%$, then the peak voltage of the modulating signal is (in $\,V$)
The modulation index for an $A.M.$ wave having maximum and minimum peak-to-peak voltages of $14\,mV$ and $6\,mV$ respectively is:
Which frequency range is allocated for commercial $FM$ radio broadcasting?
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View SolutionOnly $2 \%$ of the optical source frequency is the available channel bandwidth for an optical communication system operating at $1000 \,nm$. If an audio signal requires a bandwidth of $8 \,kHz$,how many channels can be accommodated for transmission?
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