NZART Amateur Examination                     page 6          NZARTX07 Security code 249733

  1. The frequency stability of a receiver is its ability to:
    1. stay tuned to the desired signal
    2. track the incoming signal as it drifts
    3. provide a frequency standard
    4. provide a digital readout

  2. The stage in a superhet receiver with a tuneable input and fixed tuned output is the:
    1. RF amplifier
    2. mixer stage
    3. IF amplifier
    4. local oscillator

  3. If the carrier insertion oscillator is counted, then a single conversion superhet receiver has:
    1. one oscillator
    2. two oscillators
    3. three oscillators
    4. four oscillators

  4. In the transmitter block diagram shown, the "oscillator":
    1. is variable in frequency
    2. generates an audio frequency tone during tests
    3. uses a crystal for good frequency stability
    4. may have a calibrated dial

  5. In the transmitter block diagram shown, the "oscillator" is:
    1. an audio frequency oscillator
    2. a variable frequency RF oscillator
    3. a beat frequency oscillator
    4. a variable frequency audio oscillator
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