Q. During amplitude modulation, the phase angle of the modulating voltage changes by

View solution

Q. The image frequency of a superheterodyne receiver is

View solution

Q. Image frequency rejection mainly depends upon

View solution

Q. Which of the following is most likely to be found in an SSB transmitter?

View solution

Q. Which one of the following frequency bands is allocated by ITU (International Telecomm. Union) for DBS - (Direct Broadcast service) also referred as DTH - (Direct to Home service)?

View solution

Q. FM broadcast lies in which band?

View solution

Q. Which colour picture tube uses slotted aperture mask?

View solution

Q. If the circumference of a spherical target is between 1 to 10 wavelength in a radar system, the situation is called

View solution

Q. The complete video signal consists of

View solution

Q. Transit time is considered as significant at

View solution

Q. In a colour TV receiver, AGC adjusts the gain of

View solution

Q. In pulse transmitter the ratio of time on to time off is called

View solution

Q. A MASER is a

View solution

Q. Which one of the following is correct?

View solution

Q. A paraboloid reflector has mouth diameter D meters, wavelength λ meters. Its beam width φ is equal to

View solution

Q. A balanced modulator circuit uses

View solution

Q. In a television camera tube, scanning of a picture is done

View solution

Q. In communication receivers the fidelity is provided by

View solution

Q. A signal having uniformly distributed amplitude in the interval (- V to + V) is to be encoded using PCM with uniform quantization. The signal to quantization noise ratio is determined by

View solution

Q. Bipolar signalling uses the following bits

View solution