Electronics and Communication Engineering - Communication Systems

1. 

Chrome signals in PAL colour television system consist of

A. R - Y and B - Y signal
B. V and U signals
C. I and Q signals
D. R - Y and G - Y signals

Answer: Option B

Explanation:

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2. 

In TV system in India, each frame is divided into

A. 625 horizontal lines
B. 525 horizontal lines
C. 425 horizontal lines
D. 325 horizontal lines

Answer: Option A

Explanation:

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3. 

In PAL system

A. phase of U signal is reversed on alternating lines
B. phase of V signal is reversed on alternating lines
C. phases of both U and V signals are reversed on alternating lines
D. none of the above

Answer: Option B

Explanation:

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4. 

Among the various modulation systems, the most favoured from the point of linearity of modulation and efficiency is

A. anode or collector modulation
B. central grid modulation
C. screen grid modulation
D. modulated oscillators

Answer: Option A

Explanation:

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5. 

The phase of colour subcarrier burst in PAL is along the axis at

A. +180°
B. -180°
C. ±180°
D. ±45°

Answer: Option C

Explanation:

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