1. The line code that has zero dc component for pulse transmission of random binary data is
2. An amplitude modulated signal is given by:
S(t) = 10cos(2π × 106t) + 5cos(2π × 106t)cos(2π × 103t) + 2cos(2π × 106t)cos(4π × 103t)
The effective modulation index is:
S(t) = 10cos(2π × 106t) + 5cos(2π × 106t)cos(2π × 103t) + 2cos(2π × 106t)cos(4π × 103t)
The effective modulation index is:
3. A PLL can be used to demodulate
4. Noise voltage varies in a resistor as
5. Ratio between SNR and $$\frac{{{{\text{E}}_{\text{b}}}}}{{{{\text{N}}_{\text{o}}}}}$$ of a signal is as follows
6. Determine the bandwidth of the FM signal for 5kHz audio signal modulated by a carrier of 50 MHz causing a frequency deviation of 25 kHz?
7. In a super heterodyne receiver, if the intermediate frequency is 10.7 MHz and the carrier frequency is 89.6 MHz, the image frequency is:
8. FM discriminator changes the FM signal into
9. X(t) is a stationary process with the power spectral density Sx(f) > 0 for all f. The process is passed through a system shown below.
Let SY(f) be the power spectral density of Y(t). Which one of the following statements is correct?
Let SY(f) be the power spectral density of Y(t). Which one of the following statements is correct?
10. An AM broadcast station transmits modulating frequencies up to 6 kHz. If the AM station is transmitting on a frequency of 894 kHz, the values for maximum and minimum upper and lower sidebands and the total bandwidth occupied by the AM station are:
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