Menu
Home / ECE / Communication Systems :: Section 13

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. An FM signal is modulated by an 8 kHz sine wave and has maximum and minimum frequencies of 100.05 MHz and 99.95 MHz respectively. Its deviation frequency is

    2. A.
    100 kHz
    B.
    100 MHz
    C.
    500 kHz
    D.
    108 kHz

    View Answer

    Workspace

    Discuss Discuss in Forum

  2. Assertion (A): RF tuner is called front end of TV receiver

    Reason (R): RF tuner receives the TV signal and selects the required channel.

    3. A.
    Both A and R are correct and R is correct explanation of A
    B.
    Both A and R are correct but R is not correct explanation of A
    C.
    A is correct but R is wrong
    D.
    A is wrong but R is correct

    View Answer

    Workspace

    Discuss Discuss in Forum

  3. In TV broadcast, UHF range is

    4. A.
    606 - 790 MHz
    B.
    100 - 150 MHz
    C.
    41 - 68 MHz
    D.
    174 - 230 MHz

    View Answer

    Workspace

    Discuss Discuss in Forum

  4. The most commonly used microphone for public address systems is

    5. A.
    carbon
    B.
    crystal
    C.
    moving coil
    D.
    condenser

    View Answer

    Workspace

    Discuss Discuss in Forum

  5. Pre-emphasis and De-emphasis is done by using R-C circuit.

    6. A.
    True
    B.
    False

    View Answer

    Workspace

    Discuss Discuss in Forum

  6. Which of the following is Doppler effect not used?

    7. A.
    CW radar
    B.
    FM radar
    C.
    MTI system
    D.
    Moving target plotting on PPI

    View Answer

    Workspace

    Discuss Discuss in Forum

  7. If the AF voltage is raised to 10 V, while the AM is dropped to 200 Hz, what is the deviation?

    8. A.
    10 kHz
    B.
    15 kHz
    C.
    20 kHz
    D.
    40 kHz

    View Answer

    Workspace

    Discuss Discuss in Forum

  8. In pulse code modulation when the maximum frequency in the signal is fmax the bandwidth required will be

    9. A.
    ≤ p.fmax
    B.
    ≥ p.fmax
    C.
    ≤ (p.fmax)2
    D.
    ≥ (p.fmax)2

    View Answer

    Workspace

    Discuss Discuss in Forum

  9. The oscillator frequency is set for

    10. A.
    best picture
    B.
    max. sound
    C.
    min. sound
    D.
    sound in picture

    View Answer

    Workspace

    Discuss Discuss in Forum

  10. The main advantage of DM over PCM is

    11. A.
    less bandwidth
    B.
    less power
    C.
    simple circuit
    D.
    better S/N ratio

    View Answer

    Workspace

    Discuss Discuss in Forum

Java Programming Questions and Answers Interview Questions and Answers