Q. In a picture tube, the video signal is applied to

View solution

Q. If frames are repeated at 60 Hz and each frame has 525 lines, the time for scanning one horizontal line (for progressive scanning and no interlacing) is about

View solution

Q. The name modem is a contraction of terms modulator demodulator.

View solution

Q. The use of SSB

View solution

Q. Video signals are transmitted through

View solution

Q. A TV receiver has 20 kV EHT supply and total beam current (for 3 electron guns) of 1500 μA. The power handled by IHVT is

View solution

Q. Full duplex operation

View solution

Q. In a tape recorder the erase head is

View solution

Q. Consider the following statements as regards advantages of CCD sensors as camera pick up tube

1. High sensitivity
2. Good spectral response
3. Image lag absent

Out of the above which are correct

View solution

Q. Some desirable features of a computer communication network are

1. It should accept an intended transmission without excessive delay
2. The data arriving at a receiving point should be processed rapidly
3. When a transmission calls for a response, the delay of response should be minimum.

Which of the above are true?

View solution

Q. Television transmission is by

View solution

Q. In the television system in India, the aspect ratio is

View solution

Q. In high power radars, which of the following are used for switching?

View solution

Q. A remote control for TV uses

View solution

Q. In the FM wave described by equation v = 15 sin (4 x 10⁸ t + 3 sin 1100 t), the carrier frequency and signal frequency respectively are

View solution

Q. In the television system in India, the odd and even fields are scanned

View solution

Q. Consider the following:

1. A signal f(t) and its Hilbert transform fh(t) have the same energy density spectrum
2. A signal f(t) and its Hilbert transform, fh(t) have the same auto correlation function
3. A signal f(t) and its Hilbert transform are mutually orthogonal

Which of the above are true?

View solution

Q. Vidicon and plumbicon operate on the principle of

View solution

Q. A TV receiver has a width of 60 cm. The aspect ratio is 4/3. The required EHT supply is about

View solution

Q. The typical squelch circuit

View solution