Menu
Home / ECE / Communication Systems :: Section 14

ECE :: Communication Systems

Communication Systems - Section 1
Communication Systems - Section 2
Communication Systems - Section 3
Communication Systems - Section 4
Communication Systems - Section 5
Communication Systems - Section 6
Communication Systems - Section 7
Communication Systems - Section 8
Communication Systems - Section 9
Communication Systems - Section 10
Communication Systems - Section 11
Communication Systems - Section 12
Communication Systems - Section 13
Communication Systems - Section 14
Communication Systems - Section 15
Communication Systems - Section 16
Communication Systems - Section 17
Communication Systems - Section 18
Communication Systems - Section 19
Communication Systems - Section 20
Communication Systems - Section 21
Communication Systems - Section 22
Communication Systems - Section 23
Communication Systems - Section 24
Communication Systems - Section 25
Communication Systems - section-26
Communication Systems - Section-27

  1. Chrome signals in PAL colour television system consist of

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

    View Answer

    Workspace

    Discuss Discuss in Forum

  2. In TV system in India, each frame is divided into

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

    View Answer

    Workspace

    Discuss Discuss in Forum

  3. In PAL system

    4. 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

    View Answer

    Workspace

    Discuss Discuss in Forum

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

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

    View Answer

    Workspace

    Discuss Discuss in Forum

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

    6. A.
    +180°
    B.
    -180°
    C.
    ±180°
    D.
    ±45°

    View Answer

    Workspace

    Discuss Discuss in Forum

  6. Which of the following is correct (fm is maximum usable frequency, S is speed and G is width of air gap)?

    7. A.
    fm = (S) (2G)
    B.
    C.
    D.
    G = (fm)(S)

    View Answer

    Workspace

    Discuss Discuss in Forum

  7. If the transmitted pulse power of a radar is Pt (peak value) and the antenna is isotropic, the power density at a distance r is

    8. View Answer

    Workspace

    Discuss Discuss in Forum

  8. In a hi-fi system the frequency response over the audio frequency range should be within

    9. A.
    ± 10 dB
    B.
    5 dB
    C.
    2 dB
    D.
    1 dB

    View Answer

    Workspace

    Discuss Discuss in Forum

  9. Multiplex techniques are used for

    10. A.
    low density communications
    B.
    low density point-to-point communications
    C.
    high-density point-to-point communications
    D.
    all of the above

    View Answer

    Workspace

    Discuss Discuss in Forum

  10. In delta modulation, the output signal to quantization noise ratio S0/Nq is (N is the number of bits)

    11. A.
    N2
    B.
    N3
    C.
    N2
    D.
    N3

    View Answer

    Workspace

    Discuss Discuss in Forum

Java Programming Questions and Answers Interview Questions and Answers