Which of these communications are not digital
A. PPM
B. PCM
C. PWM
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Which one of the technique involves signal composed of light beams ?
The Nyquist sampling interval, for the signal sinc (700 t) + sinc (500 t) is
In case of data transmission, which one of the following system will give maximum probabilityof error ?
The noise at the input to an ideal frequencydetector is white. Detector is operating above threshold. Power spectral density of noise atoutput is
The capacity of an analog communicationchannel, with 4 kHz bandwidth and 15 is valueof SNR, is
Noise has greatest effect in a communicationsystem when it interfere with signal.
A system has a receiver noise resistance of 50W.It is connected to an antenna with an input resistance of 50W. The noise figure of the system is
Which one of the following types of noise gains importance at high frequency
Most usefull approach to radar system formonitoring the speed of moving vehicle is
Which one of the following circuits transmits twomessage simultaneously in one direction
The most probable bandwidth of a transponderin a satelite communication system is
The blind speed of an MTI radar can be avoidedby changing the
25 docs|23 tests
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25 docs|23 tests
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