NZART Amateur Examination                     page 6          NZARTX07 Security code 268509

  1. If two receivers are compared, the more sensitive receiver will produce:
    1. more than one signal
    2. less signal and more noise
    3. more signal and less noise
    4. a steady oscillator drift

  2. A stage in a receiver with input and output circuits tuned to the received frequency is the:
    1. RF amplifier
    2. local oscillator
    3. audio frequency amplifier
    4. detector

  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 "Morse key":
    1. turns the DC power to the transmitter on and off
    2. allows the oscillator signal to pass only when the key is depressed
    3. changes the frequency of the transmitted signal when the key is depressed
    4. adds an 800 Hz audio tone to the signal when the key is depressed

  5. The following signal can be amplified using a non-linear amplifier:
    1. SSB
    2. FM
    3. AM
    4. DSBSC
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