Q. The range of a cordless telephone is about

View solution

Q. An earth mat for a communication tower consists of

View solution

Q. Degaussing in a picture tube means

View solution

Q. The rate at which information can be carried through a communication channel depends on

View solution

Q. Some types of traps used in video IF amplifier of colour TV are

View solution

Q. Direct and reflected sound waves may interfere with each other.

View solution

Q. A carrier is simultaneously modulated by two sine waves having modulation indices of 0.4 and 0.3. The total modulation index will be

View solution

Q. A 1000 kHz carrier is simultaneously modulated with 300 Hz, 800 Hz and 2 kHz audio sine waves. Which of the following frequency is least likely to be present in the output?

View solution

Q. A 400 W carrier is amplitude modulated with m = 0.75. The total power in AM is

View solution

Q. c(t) and m(t) are used to generate an FM signal. If the peak frequency deviation of the generated FM signal is three times the transmission bandwidth of the AM signal, then the coefficient of the term cos [2π(1008 x 10³t)] in the FM signal (in terms of the Bessel Coefficients) is

View solution

Q. Non-coherently detection is not possible for

View solution

Q. Tracking of extra terrestrial objects requires

View solution

Q. Assertion (A): Free space does not interfere with normal radiation and propagation of radio waves

Reason (R): Free space has no magnetic or gravitational fields.

View solution

Q. Which of the following is taken as reference antenna for directive gain?

View solution

Q. Push pull amplifier is

View solution

Q. When the channel is noisy, producing a conditional probability of error p = 0.5; the channel capacity and entropy function would be, respectively,

View solution

Q. In CCIR-B system, the time between start of one H syn. pulse and next is

View solution

Q. Counterpoise is used in coils having

View solution

Q. In standing wave pattern on a transmission line

View solution

Q. If the bandwidth is increased by 2, the γFM γAM (where γ is the ratio of SNR of output to SNR at input, FM is frequency modulation and AM is amplitude modulation) is increased by a factor of

View solution