Menu
Home / ECE / Radio Receivers :: Section 1

ECE :: Radio Receivers

Radio Receivers - Section 1
Radio Receivers - Section 2

  1. The noise generated by a resistor depends upon

    2. A.
    its resistance value
    B.
    its operating temperature
    C.
    both its resistance value and operating temperature
    D.
    none of the above

    View Answer

    Workspace

    Discuss Discuss in Forum

  2. In a superheterodyne receiver

    3. A.
    the IF stage has better selectivity than RF stage
    B.
    the RF stage has better selectivity than IF stage
    C.
    the RF stage has same selectivity than IF stage
    D.
    none of the above

    View Answer

    Workspace

    Discuss Discuss in Forum

  3. The function of an AM detector circuit is to

    4. A.
    rectify the input signal
    B.
    discard the carrier
    C.
    provide audio signal
    D.
    all of the above

    View Answer

    Workspace

    Discuss Discuss in Forum

  4. Which of the following should be used in order to prevent overloading or the last IF amplifier in a receiver?

    5. A.
    Variable selectivity
    B.
    Variable sensitivity
    C.
    Double conversion
    D.
    Squelch

    View Answer

    Workspace

    Discuss Discuss in Forum

  5. Most popular IF for receivers tuning to 540 to 1650 kHz is

    6. A.
    433 kHz
    B.
    455 kHz
    C.
    545 kHz
    D.
    555 kHz

    View Answer

    Workspace

    Discuss Discuss in Forum

  6. In a broadcast superheterodyne receiver

    7. A.
    the local oscillator operates below the signal frequency
    B.
    local oscillator frequency is normally double the IF
    C.
    RF amplifier normally works at kHz above the carrier frequency
    D.
    mixer input must be tuned to the signal frequency

    View Answer

    Workspace

    Discuss Discuss in Forum

  7. A duplexer is a device used to

    8. A.
    feed more than one receiver from a single antenna
    B.
    connect two transmitters to the same antenna
    C.
    connect a receiver and a transmitter to the same antenna
    D.
    none of these

    View Answer

    Workspace

    Discuss Discuss in Forum

  8. A heterodyne frequency changer is called a

    9. A.
    Modulator
    B.
    Mixer
    C.
    Demodulator
    D.
    Frequency translator

    View Answer

    Workspace

    Discuss Discuss in Forum

  9. RF amplifiers are used in radio receivers for

    10. A.
    improved image frequency rejection
    B.
    improved rejection of adjacent unwanted signals
    C.
    prevention of re-radiation of the local oscillator through the antenna of the receiver
    D.
    all of the above

    View Answer

    Workspace

    Discuss Discuss in Forum

  10. The sensitivity curve of a standard receiver is represented by

    11. A.
    curve A
    B.
    curve B
    C.
    curve C
    D.
    curve D

    View Answer

    Workspace

    Discuss Discuss in Forum

Java Programming Questions and Answers Interview Questions and Answers